Large Truck Crash 
Causation Study 

Codebook 

June 2006 
US Department of Transportation 


TABLE OF CONTENTS 

Introduction .....................................................................................................................................1

Case selection and sampling weights..............................................................................................1

Structure of data files.......................................................................................................................2

Sources of Data ...............................................................................................................................3

Documentation provided by codebook.............................................................................................4
Airbags Data Set.................................................................................................................5
Brakes Data Set................................................................................................................12
CargoShiftAssessments Data Set.....................................................................................18
CDCCrush Data Set..........................................................................................................26
Crash Data Set..................................................................................................................40
CrashAssessment Data Set..............................................................................................49
CrashDiscussion Data Set................................................................................................58
DMVViolation Data Set .....................................................................................................59
DriverAssessment Data Set..............................................................................................66
DriverDecisionAggression Data Set..................................................................................84
DriverDrugs Data Set........................................................................................................94
DriverHealth Data Set.......................................................................................................96
DriverRecognitionDistraction Data Set ...........................................................................104
DriverSleep Data Set ......................................................................................................112
Environment Data Set.....................................................................................................125
Events Data Set..............................................................................................................138
FactorAssessment Data Set...........................................................................................144
GeneralVehicle Data Set ................................................................................................164
HazMat Data Set.............................................................................................................196
HazMatinsp Data Set......................................................................................................198
Injuries Data Set..............................................................................................................200
JackknifeAssessments Data Set.....................................................................................209
MCMISdriverData Data Set ............................................................................................214
MCMISviolation Data Set................................................................................................218
NonMotorists Data Set....................................................................................................221
Occupants Data Set........................................................................................................230
Overview Data Set..........................................................................................................256
PARViolations Data Set..................................................................................................272
SaferAuthorityStatus Data Set........................................................................................275
SaferCarrier Data Set......................................................................................................276
SaferCrashSummary Data Set .......................................................................................284
SaferDriverCrashReport Data Set ..................................................................................287
SaferDriverInspection Data Set ......................................................................................297
SaferDriverViolation Data Set.........................................................................................303
SaferInspectionsSummary Data Set...............................................................................305
SaferInsurance Data Set.................................................................................................314
SaferReview Data Set.....................................................................................................317
SafeStat Data Set ...........................................................................................................320
TruckExterior Data Set....................................................................................................326
TruckInspection Data Set................................................................................................337
TruckUnits Data Set........................................................................................................339
VehicleEvents Data Set..................................................................................................354

LTCCS Codebook  June2006 Table of Contents  i 


VehicleExterior Data Set.................................................................................................360
Generalized Estimated Sampling Errors......................................................................................375
Index............................................................................................................................................379

LTCCS Codebook  June2006 Table of Contents  ii 


Introduction 
This report documents the September 30, 2005, version of the Large Truck Crash Causation Study 
(LTCCS) data set. The U.S. Department of Transportations (DOT) Federal Motor Carrier Safety 
Administration (FMCSA) and National Highway Traffic Safety Administration (NHTSA) conducted a 
multiyear, nationwide study of factors that contribute to truck crashes. The report summarizes all 
the information in each of the 43 data files that comprise the LTCCS data set. 

Case selection and sampling weights 

The LTCCS was conducted at 24 data collection sites in 17 States by researchers from NHTSAs 
National Automotive Sampling System (NASS) and State truck inspectors. Data were collected on 
crashes from 2001 through 2003. Crashes were sampled for the LTCCS in two stages. The 
sampling structure used the existing structure of NHTSAs National Automotive Sampling System 
Crashworthiness Data System (NASS CDS). That is, cases were sampled from sites that are part 
of the NASS CDS system. The first stage of sampling is the selection of primary sampling units 
(PSUs), which are geographic areas. The PSUs were sampled from 12 strata, which were larger 
geographic areas classified by four geographic regions (northeast, midwest, south, and west) and 
three categories of population density (central city, large county, and group of counties). Two PSUs 
were sampled from each of the 12 strata, to make 24 sampling sites. 

The second stage of sampling is to select crashes occurring within each sampled PSU. Crashes 
were eligible for sampling if they met the following two criteria: 

1. The crash involved at least one large truck, defined as a truck with a gross vehicle weight 
rating (GVWR) of 10,001 pounds or more. 
2. The crash involved at least one fatality, incapacitating, or non-incapacitating but evident 
injury. 
Injuries were classified using the KABCOU injury severity scale. Table 1 shows the available levels. 
In that scale, crashes eligible for sampling included a K, A, or B injury. 

Table 1 KABCOU Injury Scale 

Code Definition 
K Fatal injury 
A Incapacitating Injury 
B Non-Incapacitating Injury 
C Possible Injury 
O No Injury 
U Unknown 

In each data file, the variables PSU and PSUStrata identify the PSU and PSU selection stratum 
respectively, and the variable RATWeight contains the correct case weight to produce nationally 
representative estimates. The Large Truck Crash Causation Study Analytical Users Manual 
provides a complete description of the sample design and calculation of sampling weights. 
The data files provided here include both cases with valid, nonzero weights and cases with zero 
weights. The cases with zero weights either are from the pilot phase of the project or are cases that 
were sampled but later found to not meet the selection criteria. They are included for clinical 
analysis or as anecdotal data. They should not be included in estimates of nationally-representative 
results. In most software systems that support the use of a weighting variable, these cases will be 
dropped from a weighted (nationally-representative) analysis since the weight variable, RATWeight, 
is set to zero for the nonsample cases. 

LTCCS Codebook Introduction  1 


Structure of data files 

The LTCCS data is supplied in 43 data sets. The data were originally collected using a complex 
relational data system, and then formatted into analysis data sets which preserve many aspects of 
the original relational design. Table 2 identifies the data files, the level at which the data in each file 
were collected, and the variable names that can be used to uniquely identify a record in each data 
file. The level at which the data are recorded simply corresponds to the entity each record in the 
particular data file pertains to. Some files have one record per crash, one record per vehicle, or one 
record per driver. Other data files contain information at a more detailed level and may have 
multiple records per vehicle. For example, the Brakes data file includes one record for each axle on 
the truck combination. Since truck combinations sampled for the LTCCS included up to 11 axles, 
some trucks have eleven records in the Brakes file. 

Table 2 LTCCS Data Files 

Data set name 
# 
records 
# 
records 
with 
nonzero 
weights Level Unique record identifier 
AIRBAGS 857 797 Airbag CaseID, VehicleNumber, 
AirbagNumber 
BRAKES 5,283 4,798 Brake CaseID, VehicleNumber, and Axle 
CRASH 1,070 963 Crash CaseID 
DRIVERDRUGS 1,458 1,330 Drug CaseID, VehicleNumber and 
DrugName 
EVENTS 2,777 2,535 Event CaseID and EventSequence 
HAZMAT 57 51 Hazardous material CaseID, VehicleNumber and Material 
HAZMATINSP 4,107 3,517 Hazardous material 
inspection 
CaseID, VehicleNumber and 
HMIInspection 
CDCCRUSH 3,973 3,630 Impact 
CaseID, VehicleNumber, 
EventNumber and ImpactNumber or 
CaseID, VehicleNumber, 
EventNumber and PositionNumber 
INJURIES 8,937 8,295 Injury CaseID, VehicleNumber, 
OccupantNumber, and InjuryNumber 
SAFERDRIVERINSPECTION 795 778 Inspection CaseID, VehicleNumber, and 
SDIDate 
NONMOTORISTS 53 41 Nonmotorist CaseID and NonMotoristNumber 
OCCUPANTS 3,014 2,761 Occupant CaseID, VehicleNumber and 
OccupantNumber 
VEHICLEEXTERIOR 921 838 Passenger vehicle CaseID and VehicleNumber 
SAFERDRIVERCRASH-REPORT 215 213 Previous crash CaseID, VehicleNumber, and 
SCDDate 
SAFERREVIEW 1,581 1,480 Review CaseID, VehicleNumber and 
ReviewDate 
TRUCKEXTERIOR 1,241 1,123 Truck CaseID and VehicleNumber 
TRUCKUNITS 2,179 1,972 Truck unit CaseID, VehicleNumber and 
TUNPosition 
CARGOSHIFTASSESSMENTS 2,284 2,078 Vehicle CaseID and VehicleNumber 
CRASHASSESSMENT 2,284 2,078 Vehicle CaseID and VehicleNumber 
CRASHDISCUSSION 2,284 2,078 Vehicle CaseID and VehicleNumber 
ENVIRONMENT 2,284 2,078 Vehicle CaseID and VehicleNumber 
FACTORASSESSMENT 2,284 2,078 Vehicle CaseID and VehicleNumber 
GENERALVEHICLE 2,284 2,078 Vehicle CaseID and VehicleNumber 
JACKKNIFEASSESSMENTS 2,284 2,078 Vehicle CaseID and VehicleNumber 
OVERVIEW 2,284 2,078 Vehicle CaseID and VehicleNumber 

LTCCS Codebook Introduction  2 


Data set name 
# 
records 
# 
records 
with 
nonzero 
weights Level Unique record identifier 
VEHICLEEVENTS 2,284 2,078 Vehicle CaseID and VehicleNumber 
DRIVERASSESSMENT 2,284 2,078 Vehicle/Driver CaseID and VehicleNumber 
DRIVERDECISION-AGGRESSION 2,284 2,078 Vehicle/Driver CaseID and VehicleNumber 
DRIVERHEALTH 2,284 2,078 Vehicle/Driver CaseID and VehicleNumber 
DRIVERRECOGNITION-
DISTRACTION 2,284 2,078 Vehicle/Driver CaseID and VehicleNumber 
DRIVERSLEEP 2,284 2,078 Vehicle/Driver CaseID and VehicleNumber 
MCMISDRIVERDATA 1,016 927 Vehicle/Driver CaseID and VehicleNumber 
SAFERAUTHORITYSTATUS 605 560 Vehicle/Driver CaseID and VehicleNumber 
SAFERCARRIER 796 742 Vehicle/Driver CaseID and VehicleNumber 
SAFERINSPECTIONS-SUMMARY 796 742 Vehicle/Driver CaseID and VehicleNumber 
SAFERINSURANCE 605 560 Vehicle/Driver CaseID and VehicleNumber 
SAFESTAT 1,882 1,787 Vehicle/Driver CaseID and VehicleNumber 
DMVVIOLATION 4,712 4,277 Violation CaseID, VehicleNumber, and 
ViolationNumber 
MCMISVIOLATION 4,309 3,907 Violation CaseID, VehicleNumber and Code 
PARVIOLATIONS 1,945 1,816 Violation CaseID, VehicleNumber and 
PARViolationCode 
SAFERDRIVERVIOLATION 643 643 Violation CaseID and VehicleNumber* 
TRUCKINSPECTION 3,241 3,008 Violation CaseID, VehicleNumber, TINPosition 
and TINViolationCode 
SAFERCRASHSUMMARY 2,784 2,596 Year CaseID, VehicleNumber and 
SCSYear 
* One record per violation but no unique record identifier. 

The identifier variables can be used to link the data sets together to permit analyses that use 
information from more than one data set. A unique CaseID variable is assigned to each crash. 
Within each crash, each vehicle is assigned a unique value, stored in the VehicleNumber variable. 
A unique OccupantNumber is assigned to each occupant of a specific vehicle. Thus, the 
combination of CaseID, VehicleNumber, and OccupantNumber uniquely identifies a specific 
individual. To link information on drivers in the DriverAssessment file to vehicle characteristics in 
the GeneralVehicle file, one would join records that match on CaseID and VehicleNumber. 

Sources of Data 

The information in most of the data files was collected by NHTSA researchers and State truck 
inspectors at the crash scene and in subsequent investigation and assessment. Data in some of 
the data files was linked in from administrative data sets. 

Data in two data sets, MCMISDriverData and MCMISDriverViolation were linked in from the Motor 
Carrier Management Information System (MCMIS) Crash and MCMIS Inspection files, respectively. 
The MCMIS Crash file contains records of crashes reported by the States. All crashes must be 
reported that include either a truck with a GVWR over 10,000 pounds or a gross combination 
weight rating over 10,000 pounds, or a bus designed to transport more than eight people including 
the driver, or a vehicle displaying a hazardous materials placard, and the crash includes either a 
fatality, a person injured and transported for immediate medical attention, or a vehicle towed due to 
disabling damage. All such crashes must be reported by the States to the MCMIS Crash file, 
though it is known that during the data collection phase of the LTCCS, a significant number of 
qualifying crashes were not reported. The MCMIS Inspection file includes records of all vehicle 
inspections conducted by FMCSA, including roadside inspections, compliance reviews, and other 
inspections. 

LTCCS Codebook Introduction  3 


Data in ten data sets, all of which are named with the prefix SAFER-, are linked in from the 
FMCSAs Safety and Fitness Electronic Records System database. The SAFER system is used to 
evaluate the fitness of motor carriers subject to FMCSA regulation and contains information on the 
carriers fitness status, historical information on previous crashes, inspections, violations, and 
previous safety reviews of the carrier. The data files contain only records of cases that could be 
matched to records in the SAFER system. Information about prior crashes and violations can also 
be found in the GeneralVehicle data file and the DMVViolation data file. 

Documentation provided by codebook 

This codebook provides a complete listing of every variable and every code level in each data file 
(except for the record identifier variables that are repeated in each data file). For each variable in a 
data file, the codebook provides the distribution of records, the code values stored in the data file, 
the label associated with each code value, the data storage type, the storage length of the variable, 
and the format entry, if any. The codebook documents all records in the file. The records are not 
weighted but are raw counts of the number of records. The data files include both the pilot and 
nonsample records, which have a zero for the RATWeight variable, and case records, which have a 
valid RATWeight greater than zero. 

Figure 1 Codebook Listing Example 

Figure 1 provides an example of an entry for the BrakeType variable in the Brakes data file. 

1. The name of the variable in the SAS file. 
2. The name of the format associated with the variable. This format is stored in the 
FORMATS.SASB7CAT file that is supplied along with the SAS data files. Not all variables 
have associated formats in the FORMATS.SASB7CAT file. 
3. The storage type of the variable. Data are stored either as Numeric or Char (character) 
data. 
4. The storage length in bytes for the variable. Storage of numeric variables range in length 
from three to eight bytes. Character variable storage lengths vary between one and 21,000, 
which is used to store the researchers case narrative in the CrashDiscussion data file. 
5. The frequency distribution (N) and percentage distribution (Prcnt) of the code levels 
recorded for each variable. 
6. The code value stored in the data file. This is the actual value stored. In the case of Char 
variables that do not have an associated format, the codebook shows asterisks (*) for the 
code that is stored, and the stored character string is shown as the Label. 
7. The label for each code value. 
LTCCS Codebook Introduction  4 


Codebook - Airbags Data Set 

Airbags Data Set 

The Airbags data set contains all the airbag-related information for each of the vehicles involved in 
the crash. This material is provided as one record per airbag. 

The Airbags data set contains the variables CaseID, PSU, PSUStrat, RATWeight, VehicleNumber 
and AirbagNumber. AirbagNumber is assigned to each airbag in the vehicle. Each record is uniquely 
identified by CaseID, VehicleNumber and AirbagNumber. CaseID and VehicleNumber should be 
used to merge the Airbag data set with vehicle level data sets. CaseID, VehicleNumber and 
AIROccupantNumber should be used to merge the Airbags data set with the Occupant data set. 

Format 

Type 

Length

Variable Name 

BEST8 

Numeric 

8

AirbagNumber 

Definition: Identifies the number of the airbag in the vehicle. 

N 

Prcnt 

Code 

Label
586 68.4 1 1 
227 26.5 2 2 

23 2.7 3 3 
14 1.6 4 4 
2 0.2 5 5 
2 0.2 6 6 
1 0.1 7 7 
1 0.1 8 8 
1 0.1 9 9 
Format 

Type 

Length

Variable Name 

OT54F 

Numeric 

8

OccupantNumber 

Definition: Represents the occupant associated with this air bag, identified by their occupant 

number. 
N Prcnt Code Label 
648 75.6 1 1 
133 15.5 2 2 
76 8.9 99 Unknown 

Format 

Type 

Length

Variable Name 

OT60F 

Numeric 

8

SeatRow1

Definition: Identifies an air bag deployment that occurred in the first row of seats in the vehicle. 

N Prcnt Code Label 
855 99.8 1 First row 
2 0.2 9 Unknown 

LTCCS Codebook Airbags Data Set  5 


Codebook - Airbags Data Set 
Variable Name Format Type Length 
SeatLocation1 OT61F Numeric 8 

Definition: Identifies the seat location in the first row of the vehicle where an air bag deployment 

occurred. 
N Prcnt Code Label 
648 75.6 1 First location 
207 24.2 3 Third location 
2 0.2 9 Unknown 

Variable Name 

Format 

Type 

Length 

OT60F 

Numeric 

8

SeatRow2

Definition: Identifies an air bag deployment that occurred in the second row of seats in the vehicle. 

N Prcnt Code Label 
6 0.7 1 First row 
851 99.3 9 Unknown 

Variable Name 

Format 

Type 

Length 

OT61F 

Numeric 

8

SeatLocation2 

Definition: Identifies the seat location in the second row of the vehicle where an air bag deployment 

occurred. 
N Prcnt Code Label 
5 0.6 1 First location 
1 0.1 3 Third location 
851 99.3 9 Unknown 

Variable Name 

Format 

Type 

Length 

ML92F 

Numeric 

8

AirbagLocation 

Definition: Identifies the location of a particular air bag. 
N 

Prcnt 

Code 

Label
578 67.4 1 Steering Wheel Hub
116 13.5 2 Top Instrument Panel

74 8.6 3 Mid Instrument Panel 
2 0.2 4 Bottom Instrument Panel 
33 3.9 5 Seat Back 
9 1.1 6 Door 
5 0.6 7 Roof Side Rail 
1 0.1 98 Other 
39 4.6 99 Unknown 
LTCCS Codebook Airbags Data Set  6 


Codebook - Airbags Data Set 
Variable Name Format Type Length 
AirbagStatus ML91F Numeric 8 

Definition: Documents the availability of the air bag. 
N 

Prcnt 

Code 

Label
782 91.2 1 Airbag Available

1 0.1 3 Airbag not reinstalled 
74 8.6 9 Unknown if airbag available for this crash 
Variable Name 

Format 

Type 

Length 

ML211F 

Numeric 

8

AirbagType 

Definition: Describes the type of air bag present. 
N 

Prcnt 

Code 

Label
311 36.3 1 Orig. man. installed sys.

2 0.2 3 Replacement Air Bag
520 60.7 4 Unknown Type
1 0.1 8 No air bag available 
23 2.7 9 Unknown 
Variable Name 

Format 

Type 

Length 

ML291F 

Numeric 

8

Depowered 

Definition: Indicates whether or not the vehicle was equipped with a redesigned air bag for this 
location. Redesigned air bags include second-generation air bags, next-generation air bags, Air Bag 
II, advanced air bags, and other innovative systems that have been developed to make use of air bag 
protection technology. 

N 

Prcnt 

Code 

Label
373 43.5 0 Not Redesigned
381 44.5 1 Redesigned

24 2.8 2 Advanced (specify) 
1 0.1 70 No air bag available for this crash 
78 9.1 99 Unknown 
Format 

Type 

Length

Variable Name 

ML212F 

Numeric 

8

Deployment 

Definition: Describes when in the crash sequence the air bag deployed. 

N Prcnt Code Label 
383 44.7 1 Deployed during crash (as a result of impact) 
4 0.5 3 Deployed, details unknown 

LTCCS Codebook Airbags Data Set  7 


Codebook - Airbags Data Set 

N 

Prcnt 

Code 

Label 

2 0.2 4 Deployed as a result of a non-collision event during accident 
425 49.6 7 Not deployed 
1 0.1 70 No airbag functional for this crash 
42 4.9 99 Unknown if deployed 
Variable Name 

Format 

Type 

Length 

ML160F 

Numeric 

8

AirbagFailure 

Definition: Documents whether or not something abnormal has occurred to the air bag system. It 
may not necessarily mean that the air bag system was defective. 

N 

Prcnt 

Code 

Label
746 87.0 0 No

7 0.8 1 Yes (specify) 
1 0.1 70 Airbag not available 
9 1.1 79 Unknown if available
94 11.0 99 Unknown 
Variable Name 

Format 

Type 

Length 

ML489F 

Numeric 

8

SwitchType 

Definition: Describes the type of air bag cutoff switch present in the vehicle. 
N 

Prcnt 

Code 

Label
766 89.4 0 None present

14 1.6 1 Originally equipped 
1 0.1 3 Switch present, type unknown 
76 8.9 9 Unknown if switch present 
Variable Name 

Format 

Type 

Length 

ML490F 

Numeric 

8

SwitchStatus 

Definition: Describes the status of the airbag cutoff switch at the time of the crash. 
N 

Prcnt 

Code 

Label 

12 1.4 0 Switch On/Automatic
766 89.4 7 None present
51 6.0 8 Unknown if switch present 
28 3.3 9 Switch status unknown 
LTCCS Codebook Airbags Data Set  8 


Codebook - Airbags Data Set 

Format 

Type 

Length

Variable Name 

ML164F 

Numeric 

8

FlapsOpen 

Definition: Documents whether or not the air bag properly opened at its tear points. A designated 
tear point is a weakened area of the flap material designed to allow the air bag easy escape from its 
storage area during deployment. Some air bags in the seat cushion and seat back may not have 
cover flaps, but will deploy through a seam that separates during the air bag deployment. 

N 

Prcnt 

Code 

Label 

5 0.6 0 No
322 37.6 1 Yes
419 48.9 60 Not deployed
10 1.2 69 Unknown if deployed 
1 0.1 70 No airbag available for this crash 
10 1.2 79 Unknown
90 10.5 99 Unknown if flaps/seams opened at tear points 
Variable Name 

Format 

Type 

Length 

ML163F 

Numeric 

8

FlapsDamaged 

Definition: Indicates whether or not the air bag cover flaps sustained damage during deployment. 
Normal separation/tearing at the designated tear points does not constitute damage. 

N 

Prcnt 

Code 

Label
316 36.9 0 No

6 0.7 1 Yes (specify)
419 48.9 60 Not deployed
10 1.2 69 Unknown if deployed 
1 0.1 70 No airbag available for this crash
105 12.3 99 Unknown if airbag module cover flaps opened at tear points 
Variable Name 

Format 

Type 

Length 

ML158F 

Numeric 

8

AirbagDamage 

Definition: Documents any damage to the air bag during the crash sequence. 
N 

Prcnt 

Code 

Label
295 34.4 0 Not Damaged

1 0.1 1 Ruptured 
4 0.5 2 Cut 
9 1.1 3 Torn 
1 0.1 4 Punctured 
4 0.5 5 Burned 
2 0.2 6 Abraded
419 48.9 60 Not deployed
LTCCS Codebook Airbags Data Set  9 


Codebook - Airbags Data Set 

N 

Prcnt 

Code 

Label 

17 2.0 69 Unknown if deployed 
1 0.1 70 No airbag available for this crash 
2 0.2 88 Other damage (specify) 
1 0.1 95 Damaged, details unknown
101 11.8 99 Deployed, unknown if damaged 
Format 

Type 

Length

Variable Name 

ML223F 

Numeric 

8

DamageSource 

Definition: Documents the source of damage to the air bag during the crash sequence. This 
variable is related to the variable Was There Damage To The Air Bag? 

N 

Prcnt 

Code 

Label 

3 0.4 5 Fire in vehicle 
1 0.1 6 Thermal burns 
8 0.9 7 Windshield 
3 0.4 8 Rescue or emergency efforts
295 34.4 50 Not Damaged
65 7.6 59 Deployed, unknown if damaged
419 48.9 60 Not deployed
17 2.0 69 Unknown if deployed 
1 0.1 70 No airbag available for this crash 
2 0.2 88 Other damage source (specify) 
43 5.0 99 Damaged, unknown source 
Format 

Type 

Length

Variable Name 

ML215F 

Numeric 

8

PriorCrashes 

Definition: Documents whether the vehicle had been in any previous crashes (that may or may not 
have involved air bag deployment). 

N 

Prcnt 

Code 

Label
148 17.3 1 No previous crashes

6 0.7 2 Previous crash(es) without deployment(s) 
1 0.1 3 One previous crash with deployment 
3 0.4 8 Previous crashes, unknown deployment status 
699 81.6 9 Unknown 
LTCCS Codebook Airbags Data Set  10 


Codebook - Airbags Data Set 
Variable Name Format Type Length 
PriorMaintenance ML165F Numeric 8 

Definition: Indicates whether or not the air bag had received any maintenance or service work prior 
to the crash. 

N 

Prcnt 

Code 

Label
138 16.1 0 No
719 83.9 9 Unknown 

Variable Name 

Format 

Type 

Length 

ML162F 

Numeric 

8

CDC 

Definition: Indicates the CDCs delta V rating for the impact associated with this air bags 
deployment. 

N 

Prcnt 

Code 

Label
270 31.5 1 Highest Delta V

41 4.8 2 Second Highest Delta V 
1 0.1 3 Other delta V (specify) 
5 0.6 9 Unknown
413 48.2 60 Not deployed
17 2.0 69 Unknown if deployed 
1 0.1 70 No airbag available for this crash
109 12.7 99 Deployed, unknown event 
Variable Name 

Format 

Type 

Length 

ML214F 

Numeric 

8

ContactOther 

Definition: Documents whether another occupant (besides the intended occupant) contacted this 
particular air bag. 

N 

Prcnt 

Code 

Label
336 39.2 0 No

4 0.5 1 Yes (specify)
419 48.9 60 Not deployed
10 1.2 69 Unknown if deployed 
1 0.1 70 Airbag not functional (disconnected or not reinstalled) 
15 1.8 79 Unknown 
72 8.4 99 Deployed, unknown if other occupant contact to airbag 
LTCCS Codebook Airbags Data Set  11 


Codebook - Brakes Data Set 

Brakes Data Set 

The Brakes data set contains information about the brake equipment on the vehicles. It is broken out 
by axle, which becomes part of the unique key of this data set. This material is provided as one 
record per axle for each truck involved in the crash for which brakes have been coded. 

The Brakes data set contains the variables CaseID, PSU, PSUStrat, RATWeight, and 
VehicleNumber. CaseID, VehicleNumber, and Axle uniquely identify each record in this data set. 
CaseID and VehicleNumber should be used to merge the Brakes data set with vehicle level data 
sets. 

Format 

Type 

Length

Variable Name 

BEST8 

Numeric 

8

Axle 

Definition: Identifies the axle to which the brake information is related.
N 

Prcnt 

Code 

Label 
1,186 22.4 1 1 
1,186 22.4 2 2 
1,032 19.5 3 3 
891 16.9 4 4 
791 15.0 5 5 

87 1.6 6 6 

49 0.9 7 7 

30 0.6 8 8 

15 0.3 9 9 

8 0.2 10 10 

8 0.2 11 11 

Variable Name 

Format 

Type 

Length 

ML538F 

Numeric 

8

BrakeType 

Definition: Documents the type of brake system present at a particular axle. 
N 

Prcnt 

Code 

Label 
4,910 92.9 1 Air 
205 3.9 2 Hydraulic 

40 0.8 3 Electric
128 2.4 9 Unknown 

LTCCS Codebook Brakes Data Set  12 


Codebook - Brakes Data Set 

Format 

Type 

Length

Variable Name 

OT4F 

Numeric 

8

BRAPosition 

Definition: Identifies on which unit of the truck configuration a particular axle is located.
N 

Prcnt 

Code 

Label 
3,215 60.9 1 First Unit 
1,623 30.7 2 Second Unit 

120 2.3 3 Third Unit 

325 6.2 9 Unknown 

Format 

Type 

Length

Variable Name 

ML535F 

Numeric 

8

ABSInstalled 

Definition: Indicates whether or not ABS is available at a particular axle. 
N Prcnt Code Label 
2,537 48.0 0 No 
1,588 30.1 1 Yes 
1,158 21.9 99 Unknown 
Variable Name 
ABSFunctional 
Format 
ML536F 
Type 
Numeric 
Length 
8 

Definition: Indicates whether or not the ABS is functioning properly at a particular axle. 

N Prcnt Code Label 
2,270 43.0 0 No 
1,192 22.6 1 Yes 
1,821 34.5 99 Unknown 

Variable Name 

Format 

Type 

Length 

ML537F 

Numeric 

8

AdjustorType 

Definition: Indicates the type of brake adjustment system that is present at a particular axle. 

N Prcnt Code Label 
1,616 30.6 1 Man 
2,405 45.5 2 Auto 
1,262 23.9 99 Unknown 

LTCCS Codebook Brakes Data Set  13 


Codebook - Brakes Data Set 

Format 

Type 

Length 

OT5F14.2 

Numeric 

8

ChamberSize 

Definition: Documents the size of the brake chamber for the braking system at a particular axle. 
N 

Prcnt 

Code 

Label 

1 0.0 1.83 1.83 
3 0.1 2.06 2.06 
1 0.0 10.8 10.80 
1 0.0 11.43 11.43 
2 0.0 13.3 13.30 
2 0.0 13.34 13.34 
12 0.2 14.45 14.45 
6 0.1 14.5 14.50 
35 0.7 16.19 16.19 
21 0.4 16.2 16.20 
6 0.1 16.27 16.27 
3 0.1 16.5 16.50
200 3.8 17.2 17.20
12 0.2 17.21 17.21
399 7.6 17.22 17.22
1 0.0 17.7 17.70 
2 0.0 18 18.00 
2 0.0 18.3 18.30 
2 0.0 18.33 18.33
187 3.5 18.34 18.34
66 1.2 18.4 18.40 
5 0.1 20 20.00 
3 0.1 20.5 20.50
151 2.9 20.55 20.55
1,892 35.8 20.56 20.56 
868 16.4 20.6 20.60 

2 0.0 20.64 20.64 
3 0.1 22.86 22.86 
6 0.1 22.9 22.90 
5 0.1 24 24.00 
2 0.0 27.94 27.94 
47 0.9 30 30.00 
1 0.0 30.48 30.48 
5 0.1 38.1 38.10 
3 0.1 40.64 40.64 
17 0.3 41.9 41.90 
9 0.2 41.91 41.91 
LTCCS Codebook Brakes Data Set  14 


Codebook - Brakes Data Set 

N 

Prcnt 

Code 

Label 

10 0.2 45.7 45.70 
3 0.1 45.72 45.72 
2 0.0 50.8 50.80 
4 0.1 60.96 60.96 
18 0.3 76.2 76.20
263 5.0 8887 Not Applicable
515 9.7 9994 Not Examined
485 9.2 9999 Unknown 
Format 

Type 

Length

Variable Name 

ML539F 

Numeric 

8

ChamberType 

Definition: Documents the type of chamber for a braking system at a particular axle. 
N 

Prcnt 

Code 

Label 

1 0.0 1 A 6-15/16 1-3/8 
4 0.1 3 C 8-1/16 1-3/4 
1 0.0 8 C-6 4-1/2 1-1/4 
4 0.1 9 C-9 5-1/4 1-3/8 
20 0.4 10 C-12 5-11/16 1-3/8 
55 1.0 11 C-16 6-3/8 1-3/4
623 11.8 12 C-20 6-25/32 1-3/4
241 4.6 13 C-24 7-7/32 1-3/4
3,024 57.2 14 C-30 8-3/32 2 

10 0.2 15 C-36 9 2-1/4 
2 0.0 16 D-30 8-1/8 2-1/4 
4 0.1 17 DISC NA 
28 0.5 18 ELEC NA
156 3.0 19 HYDR NA
2 0.0 20 L-16 6-3/8 2.0 
13 0.2 21 L-20 6-25/32 2.0 
22 0.4 22 L-24 7-7/32 2.0 
5 0.1 23 L-24* 7-7/32 2.5 
68 1.3 24 L-30 8-3/32 2.5 
1 0.0 25 MM 8-1/8 2-1/4 
1 0.0 29 R-20 5-15/16 2 
6 0.1 30 R-24 6-13/32 2 
2 0.0 31 R-30 7-1/16 2-1/4 
27 0.5 34 WEDG 5/16 5/16 
43 0.8 88 Not Applicable
920 17.4 99 Unknown 
LTCCS Codebook Brakes Data Set  15 


Codebook - Brakes Data Set 

Format 

Type 

Length

Variable Name 

ML531F 

Numeric 

8

StrokeType 

Definition: Indicates whether a particular chamber type is categorized as long or short.
N 

Prcnt 

Code 

Label
218 4.1 1 Long

3,738 70.8 2 Short 
822 15.6 3 Not Examined 
505 9.6 9 Unknown 

Format 

Type 

Length

Variable Name 

OT6F14.2 

Numeric 

8

LeftLength 

Definition: Documents the length (in centimeters) of the left brake chamber at a particular axle. This 
value is measured and provided by the FMCSA Truck Inspector. 

N 

Prcnt 

Code 

Label 

7 0.1 0 0.00 
20 0.4 0.13 0.13 
2 0.0 0.16 0.16 
1 0.0 0.19 0.19 
1 0.0 0.24 0.24 
4 0.1 0.25 0.25 
11 0.2 0.32 0.32 
2 0.0 0.35 0.35 
1 0.0 0.40 0.40 
1 0.0 0.48 0.48 
------------------------------
1 0.0 10.48 10.48 
1 0.0 12.90 12.90 
3 0.1 13.96 13.96 
1 0.0 14.52 14.52 
1 0.0 15.32 15.32 
1 0.0 16.13 16.13
265 5.0 8887 Not Applicable
68 1.3 9992 Inoperable
965 18.3 9994 Not Examined
167 3.2 9999 Unknown 
LTCCS Codebook Brakes Data Set  16 


Codebook - Brakes Data Set 

Format 

Type 

Length

Variable Name 

OT6F14.2 

Numeric 

8

RightLength 

Definition: Documents the length (in centimeters) of the right brake chamber at a particular axle. 
This value is measured and provided by the FMCSA Truck Inspector. 

N 

Prcnt 

Code 

Label 

8 0.2 0 0.00 
1 0.0 0.01 0.01 
21 0.4 0.13 0.13 
3 0.1 0.16 0.16 
1 0.0 0.19 0.19 
4 0.1 0.25 0.25 
2 0.0 0.29 0.29 
12 0.2 0.32 0.32 
2 0.0 0.35 0.35 
2 0.0 0.40 0.40 
------------------------------
1 0.0 13.96 13.96 
1 0.0 14.28 14.28 
1 0.0 14.52 14.52 
2 0.0 14.59 14.59 
1 0.0 15.32 15.32 
1 0.0 16.13 16.13
263 5.0 8887 Not Applicable
60 1.1 9992 Inoperable
963 18.2 9994 Not Examined
165 3.1 9999 Unknown 
LTCCS Codebook Brakes Data Set  17 


Codebook - CargoShiftAssessments Data Set 

CargoShiftAssessments Data Set 

The CargoshiftAssessments data set contains detailed information on cargo shift events for all 
vehicles in the crash. Cargo shift is a pre-crash event. One record of this information is stored for 
each vehicle. 

The CargoshiftAssessments data set contains the variables CaseID, PSU, PSUStrat, RATWeight, 
and VehicleNumber. CaseID and VehicleNumber uniquely identify each record in this data set and 
should be used to merge the CargoshiftAssessments data set with other vehicle level data sets. This 
data set also contains the following variables: 

Format 

Type 

Length

Variable Name 

ML1609F 

Numeric 

8

ACSType 

Definition: Documents the occurrence of a precrash cargo shift and the type of freight that shifted. 
The cargo shift must occur prior to any impact event. 

N 

Prcnt 

Code 

Label
909 39.8 0 No pre-crash cargo shift

5 0.2 2 Bulk freight (containerized) 
10 0.4 3 Bulk freight (not containerized) 
14 0.6 4 Large objects (solids) 
10 0.4 6 Tank -liquids
1,300 56.9 77 Not applicable
4 0.2 88 Other (specify) 
32 1.4 99 Unknown 
Format 

Type 

Length

Variable Name 

ML1607F 

Numeric 

8

ACSLocation 

Definition: Establishes the vehicle location at the start of the cargo shift sequence. 
N 

Prcnt 

Code 

Label
909 39.8 0 No pre-crash event

40 1.8 1 On roadway 
2 0.1 2 On shoulder 
1 0.0 3 On roadside 
1,297 56.8 7 Not applicable 
35 1.5 9 Unknown 
LTCCS Codebook CargoShiftAssessments Data Set  18 


Codebook - CargoShiftAssessments Data Set 
Variable Name Format Type Length 
MovementCount BEST8 Numeric 8 

Definition: Documents the number of circumstances that were identified in which the cargo shift 
event occurred. This variable refers to the movements of the vehicle prior to the cargo shift. 

N 

Prcnt 

Code 

Label 
2,241 98.1 0 0 

6 0.3 1 1 
27 1.2 2 2 
9 0.4 3 3 
1 0.0 4 4 
Variable Name 

Format 

Type 

Length 

AP2U 

Numeric 

8

CauseCount 

Definition: Documents the number of circumstances associated with a cargo shift that were coded 
for this vehicle. Refers to the possible causes of the cargo shift. 

N 

Prcnt 

Code 

Label 
2,241 98.1 0 0 

31 1.4 1 1 
8 0.4 2 2 
2 0.1 3 3 
2 0.1 99 99 
Variable Name 

Format 

Type 

Length 

ML1608F 

Numeric 

8

ACSSpillage 

Definition: Establishes the occurrence of cargo spillage during the precrash phase. 
N 

Prcnt 

Code 

Label
909 39.8 0 No pre-crash cargo shift

10 0.4 1 Yes (specify) 
34 1.5 2 No 
1,295 56.7 7 Not applicable 
36 1.6 9 Unknown 
LTCCS Codebook CargoShiftAssessments Data Set  19 


Codebook - CargoShiftAssessments Data Set 
Variable Name Format Type Length 
ACSConstant AP1U Numeric 8 

Definition: Establishes whether or not the driver is attempting to maintain a constant velocity at the 
time that the cargo begins to shift. (This variable was originally an attribute choice under the variable 
Circumstances In Which Event Occurred.) 

N Prcnt Code Label 
2,265 99.2 0 Absent 
19 0.8 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

ACSCurve 

Definition: Establishes whether or not the driver is traversing a curve at the time that the cargo 
begins to shift. (This variable was originally an attribute choice under the variable Circumstances In 

Which Event Occurred.) 
N Prcnt Code Label 
2,254 98.7 0 Absent 
30 1.3 1 Present 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

ACSTurn 

Definition: Establishes whether or not the driver is attempting to turn at the time that the cargo 
begins to shift. (This variable was originally an attribute choice under the variable Circumstances In 

Which Event Occurred.) 
N Prcnt Code Label 
2,276 99.6 0 Absent 
8 0.4 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

ACSLightBraking 

Definition: Establishes whether or not the driver is decelerating using light braking effort at the time 
that the cargo begins to shift. While the term light braking is a subjective evaluation, it generally 
implies that the level of braking is less than the level typically associated with a normal traffic stop. 
(This variable was originally an attribute choice under the variable Circumstances In Which Event 

Occurred.) 
N Prcnt Code Label 
2,282 99.9 0 Absent 
2 0.1 1 Present 

LTCCS Codebook CargoShiftAssessments Data Set  20 


Codebook - CargoShiftAssessments Data Set 
Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8 

Definition: Establishes whether or not the driver is accelerating at the time that the cargo begins to 
shift. (This variable was originally an attribute choice under the variable Circumstances In Which 

ACSAccelerating 

Event Occurred.) 
N Prcnt Code Label 
2,280 99.8 0 Absent 
4 0.2 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

ACSAvoidance 

Definition: Establishes whether or not the driver initiates a precrash avoidance maneuver at or prior 
to the time that the cargo begins to shift. (This variable was originally an attribute choice under the 
variable Circumstances In Which Event Occurred.) 

N Prcnt Code Label 
2,277 99.7 0 Absent 
7 0.3 1 Present 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

OtherMovement 

Definition: Establishes whether or not the driver/vehicle action or velocity is not described by the 
other cargo shift occurrence variables. (This variable was originally an attribute choice under the 
variable Circumstances In Which Event Occurred and was the Other (specify): attribute choice.) 

N Prcnt Code Label 
2,279 99.8 0 Absent 
5 0.2 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

ACSDecelerating 

Definition: Establishes whether or not the driver is decelerating and decelerates solely by reducing 
throttle input at the time that the cargo begins to shift. (This variable was originally an attribute choice 
under the variable Circumstances In Which Event Occurred.) 

N 

Prcnt 

Code 

Label 
2,284 100.0 0 Absent 

LTCCS Codebook CargoShiftAssessments Data Set  21 


Codebook - CargoShiftAssessments Data Set 

Format 

Type 

LengthVariable Name 

AP1U 

Numeric 

8

ACSModerateBraking 

Definition: Establishes whether or not the driver is decelerating using a moderate level of braking 
effort at the time that the cargo begins to shift. A moderate level of braking effort generally implies 
that the level of braking effort is similar to the level typically associated with a normal traffic stop. 
(This variable was originally an attribute choice under the variable Circumstances In Which Event 

Occurred.) 
N Prcnt Code Label 
2,281 99.9 0 Absent 
3 0.1 1 Present 

Format 

Type 

LengthVariable Name 

AP1U 

Numeric 

8

ACSHeavyBraking 

Definition: Establishes whether or not the driver is decelerating using a heavy level of braking effort 

(e.g. panic stop) at the time that the cargo begins to shift. The vehicle will typically experience wheel 
lock-up in this circumstance; however, wheel lock is not a requirement for using this designation. 
(This variable was originally an attribute choice under the variable Circumstances In Which Event 
Occurred.) 
N 

Prcnt 

Code 

Label 
2,277 99.7 0 Absent 

7 0.3 1 Present 
Format 

Type 

LengthVariable Name 

AP1U 

Numeric 

8

ACSStraight 

Definition: Establishes whether or not the driver is traversing a straight roadway segment at the 
time that the cargo begins to shift. (This variable was originally an attribute choice under the variable 
Circumstances In Which Event Occurred.) 

N 

Prcnt 

Code 

Label 
2,278 99.7 0 Absent 

6 0.3 1 Present 
LTCCS Codebook CargoShiftAssessments Data Set  22 


Codebook - CargoShiftAssessments Data Set 

Format 

Type 

LengthVariable Name 

AP1U 

Numeric 

8

ImproperGeneralLoading 

Definition: Establishes whether or not the cargo shift is associated with improper loading of general 
freight cargo. Usually, the cargo is not properly balanced during the loading process (e.g. large boxes 
on top of small boxes, inappropriate gaps between cargo units, etc.). This element is also used when 
the freight is not properly distributed over the length of the cargo area. (This variable was originally an 
attribute choice under the variable Cargo Shift Associated With.) 

N Prcnt Code Label 
2,282 99.9 0 Absent 
2 0.1 1 Present 

Format 

Type 

LengthVariable Name 

AP1U 

Numeric 

8

ImproperBulkLoading 

Definition: Establishes whether or not the cargo shift is associated with improper loading of bulk 
freight cargo. Usually, the cargo consists of one or several large items that are not properly balanced. 
(This variable was originally an attribute choice under the variable Cargo Shift Associated With.) 

N 

Prcnt 

Code 

Label 
2,281 99.9 0 Absent 

3 0.1 1 Present 
Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

SparseTieDowns 

Definition: Establishes whether or not the cargo shift is associated with an inadequate number of tie 
downs used. This circumstance is most typically associated with bulk freight items. (This variable 
was originally an attribute choice under the variable Cargo Shift Associated With.) 

N Prcnt Code Label 
2,268 99.3 0 Absent 
16 0.7 1 Present 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

WeakTieDowns 

Definition: Establishes whether or not the cargo shift is associated with inadequate strength of the 
tie downs that are used. This circumstance is most typically associated with bulk freight items. (This 
variable was originally an attribute choice under the variable Cargo Shift Associated With.) 

N Prcnt Code Label 
2,275 99.6 0 Absent 
9 0.4 1 Present 

LTCCS Codebook CargoShiftAssessments Data Set  23 


Codebook - CargoShiftAssessments Data Set 
Variable Name Format Type Length 
OtherSolids AP1U Numeric 8 

Definition: Establishes whether or not the cargo shift (solid freight) is associated with a specific 
factor that is not covered under the loading or securement variables. (This variable was originally an 
attribute choice under the variable Cargo Shift Associated With.) 

N Prcnt Code Label 
2,273 99.5 0 Absent 
11 0.5 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

Sloshing 

Definition: Establishes whether or not the cargo shift (liquids) is associated with liquid slosh due to 
the truck carrying less than a full load. This affects vehicle stability. (This variable was originally an 
attribute choice under the variable Cargo Shift Associated With.) 

N Prcnt Code Label 
2,274 99.6 0 Absent 
10 0.4 1 Present 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

BaffleFailure 

Definition: Establishes whether or not the cargo shift (liquids) is associated with a baffle failure that 
affects vehicle stability. (This variable was originally an attribute choice under the variable Cargo 

Shift Associated With.) 
N Prcnt Code Label 
2,284 100.0 0 Absent 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

CompartmentFailure 

Definition: Establishes whether or not the cargo shift (liquids) is associated with a failure of a 
partition for at least one of the vehicles compartments. This failure subsequently affects vehicle 
stability. (This variable was originally an attribute choice under the variable Cargo Shift Associated 
With.) 

N 

Prcnt 

Code 

Label 
2,284 100.0 0 Absent 

LTCCS Codebook CargoShiftAssessments Data Set  24 


Codebook - CargoShiftAssessments Data Set 
Variable Name Format Type Length 
TankFailure AP1U Numeric 8 

Definition: Establishes whether or not the cargo shift (liquids) is associated with a tank failure (e.g. 
seam failure). The failure may or may not affect vehicle stability. (This variable was originally an 
attribute choice under the variable Cargo Shift Associated With.) 

N 

Prcnt 

Code 

Label 
2,284 100.0 0 Absent 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

OtherLiquids 

Definition: Establishes whether or not the cargo shift (liquid freight) is associated with a specific 
factor that is not covered under the other liquid cargo shift variables. (This variable was originally an 
attribute choice under the variable Cargo Shift Associated With.) 

N 

Prcnt 

Code 

Label 
2,284 100.0 0 Absent 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

OtherCargos 

Definition: Establishes whether or not the cargo type is neither solid nor liquid (e.g. grains, bulk 
powders, etc.) and the vehicle experiences a cargo shift. (This variable was originally an attribute 
choice under the variable Cargo Shift Associated With.) 

N Prcnt Code Label 
2,282 99.9 0 Absent 
2 0.1 1 Present 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

UnknownCause 

Definition: Establishes whether or not there is insufficient information to determine if a cargo shift 
occurred. (This variable was originally an attribute choice under the variable Cargo Shift Associated 

With.) 
N Prcnt Code Label 
2,282 99.9 0 Absent 
2 0.1 1 Present 

LTCCS Codebook CargoShiftAssessments Data Set  25 


Codebook - CDCCrush Data Set 

CDCCrush Data Set 

The CDCCrush data set contains detailed information about the crush profile for each impact, coded 
to a vehicle damaged in the crash. This material is provided as one record per unit/event/deformation 
location for any vehicle involved in the crash. 

The CDCCrush data set contains the variables CaseID, PSU, PSUStrat, RATWeight, 
VehicleNumber, EventNumber and ImpactNumber. EventNumber identifies a particular event in a 
sequence in the accident. ImpactNumber identifies each particular impact in the crush profile for a 
vehicle. CaseID, VehicleNumber, EventNumber and ImpactNumber uniquely identify each record in 
this data set. (Each record can also be uniquely identified by CaseID, VehicleNumber, EventNumber 
and PositionNumber.) CaseID and EventNumber should be used to merge the CDCCrush data set 
with the Events data set. CaseID and VehicleNumber should be used to merge the CDCCrush data 
set with vehicle level data sets. CaseID, VehicleNumber and PositionNumber should be used to 
merge the CDCCrush data set with the TruckUnits data set. 

Format 

Type 

Length

Variable Name 

BEST8 

Numeric 

8

EventNumber 

Definition: Identifies a particular event in a sequence in the accident. 
N 

Prcnt 

Code 

Label 
1,742 43.8 1 1 
986 24.8 2 2 
530 13.3 3 3 
295 7.4 4 4 
163 4.1 5 5 
103 2.6 6 6 

55 1.4 7 7 

29 0.7 8 8 

17 0.4 9 9 

11 0.3 10 10 

5 0.1 11 11 

7 0.2 12 12 

5 0.1 13 13 

5 0.1 14 14 

1 0.0 15 15 

1 0.0 16 16 

1 0.0 19 19 

1 0.0 20 20 

2 0.1 21 21 

2 0.1 22 22 

1 0.0 23 23 

2 0.1 24 24 

2 0.1 25 25 

1 0.0 26 26 

1 0.0 27 27 

1 0.0 32 32 

LTCCS Codebook CDCCrush Data Set  26 


Codebook - CDCCrush Data Set 

N 

Prcnt 

Code 

Label 

1 0.0 33 33 
1 0.0 34 34 
1 0.0 39 39 
1 0.0 41 41 
Variable Name 

Format 

Type 

Length 

BEST8 

Numeric 

8

PositionNumber 

Definition: Identifies the unit number on the vehicle associated with a CDC/TDC. For example, a 
truck-trailers power unit would be Position Number 1, and the first trailer would be Position Number 
2. A passenger vehicle would be assigned Position Number 1. 

N Prcnt Code Label 
3,433 86.4 1 1 
514 12.9 2 2 
26 0.7 3 3 

Variable Name 

Format 

Type 

Length 

$1 

Char 

1

DCType 

Definition: Indicates whether the deformation classification is related to a car or a truck.
N 

Prcnt 

Code 

Label 
3,973 100.0 T T 

Format 

Type 

Length

Variable Name 

ML33F 

Numeric 

8

ObjectContactClass 

Definition: Describes the category of object involved in a particular impact to a vehicle.
N 

Prcnt 

Code 

Label 

2,617 65.9 1 Vehicle 

480 12.1 2 Noncollision 

726 18.3 3 Collision with Fixed Object 

141 3.5 5 Collision with Nonfixed Object 

3 0.1 6 Unknown event or object 
6 0.2 7 Other event (specify) 
LTCCS Codebook CDCCrush Data Set  27 


Codebook - CDCCrush Data Set 

Format 

Type 

Length

Variable Name 

ML34F 

Numeric 

8

CDCObjectContact 

Definition: Identifies the object that was contacted for this event/impact.
N 

Prcnt 

Code 

Label 

1,791 45.1 1 Vehicle#1 
406 10.2 2 Vehicle#2 
206 5.2 3 Vehicle#3 
121 3.0 4 Vehicle#4 

41 1.0 5 Vehicle#5 
29 0.7 6 Vehicle#6 
6 0.2 7 Vehicle#7 
1 0.0 18 Vehicle#18 
2 0.1 19 Vehicle#19 
5 0.1 21 Vehicle#21 
2 0.1 22 Vehicle#22 
3 0.1 24 Vehicle#24 
1 0.0 27 Vehicle#27 
2 0.1 28 Vehicle#28 
1 0.0 30 Vehicle#30
312 7.9 31 Overturn->rollover(excludes end-over-end)
126 3.2 34 Jackknife
29 0.7 35 Other intraunit damage (specify) 
13 0.3 38 Other noncollision (specify) 
13 0.3 41 Tree(<= 10 cm in diameter) 
43 1.1 42 Tree(> 10 cm in diameter) 
9 0.2 43 Shrubbery or bush 
23 0.6 44 Embankment 
24 0.6 45 Breakaway pole or post (any diameter) 
34 0.9 50 Nonbreakaway pole or post (<=10cm in diameter) 
38 1.0 51 Nonbreakaway pole or post(>10 cm but <= 30 cm in diameter) 
13 0.3 52 Nonbreakaway pole or post(>30 cm in diameter) 
6 0.2 53 Nonbreakaway pole or post(diameter unknown)
189 4.8 54 Concrete traffic barrier
6 0.2 55 Impact attenuator
157 4.0 56 Other traffic barrier(includes guardrail) (specify)
32 0.8 57 Fence 
18 0.5 58 Wall 
4 0.1 59 Building 
14 0.4 60 Ditch or culvert 
19 0.5 61 Ground 
2 0.1 62 Fire hydrant 
LTCCS Codebook CDCCrush Data Set  28 


Codebook - CDCCrush Data Set 

N 

Prcnt 

Code 

Label 

27 0.7 63 Curb 
30 0.8 64 Bridge 
24 0.6 68 Other fixed object (specify) 
1 0.0 69 Unknown fixed object 
23 0.6 70 Pass. car,light truck,van,or other vehicle not in-transport 
1 0.0 71 Medium/heavy truck or bus not in-transport 
38 1.0 72 Pedestrian 
8 0.2 73 Cyclist or cycle 
1 0.0 75 Vehicle occupant 
1 0.0 76 Animal 
8 0.2 77 Train 
4 0.1 78 Trailer, disconnected in transport 
36 0.9 79 Object fell from vehicle in-transport 
21 0.5 88 Other nonfixed object (specify) 
6 0.2 98 Other event (specify) 
3 0.1 99 Unknown event or object 
Variable Name 

Format 

Type 

Length 

BEST8 

Numeric 

8

ForceDirection 

Definition: Indicates the direction of force exerted upon the vehicle by an object. If the force is 
applied directly upon the center of the front bumper, the force of direction is said to be 0. The 
direction of force rotates to the right around the vehicle in increments of 10 degrees, circling around 
the vehicle until it returns to the front (360 degrees). This value is used to create the variable Clock 
Force. 

N 

Prcnt 

Code 

Label
658 16.6 0 0 
220 5.5 10 10
110 2.8 20 20
104 2.6 30 30

27 0.7 40 40 
31 0.8 50 50 
21 0.5 60 60 
39 1.0 70 70 
54 1.4 80 80
118 3.0 90 90
33 0.8 100 100 
21 0.5 110 110 
18 0.5 120 120 
5 0.1 130 130 
13 0.3 140 140 
27 0.7 150 150 
LTCCS Codebook CDCCrush Data Set  29 


Codebook - CDCCrush Data Set 

N 

Prcnt 

Code 

Label 

56 1.4 160 160 

99 2.5 170 170 
305 7.7 180 180 

85 2.1 190 190 

57 1.4 200 200 

20 0.5 210 210 

24 0.6 220 220 

11 0.3 230 230 

13 0.3 240 240 

15 0.4 250 250 

27 0.7 260 260 
129 3.2 270 270 

60 1.5 280 280 

31 0.8 290 290 

40 1.0 300 300 

20 0.5 310 310 

34 0.9 320 320 

76 1.9 330 330 
120 3.0 340 340 
306 7.7 350 350 
575 14.5 888 888 
371 9.3 999 999 

Format 

Type 

Length

Variable Name 

BEST8 

Numeric 

8

ClockForce 

Definition: Identifies the direction from which the principal force is applied for a particular impact. 
The direction of force is based on the face of a clock (e.g. an impact to the front bumper is classified 
as 12) and is the first two columns of each impacts CDC/TDC. 

N 

Prcnt 

Code 

Label
575 14.5 0 0 
233 5.9 1 1 

86 2.2 2 2 
200 5.0 3 3 

43 1.1 4 4 

96 2.4 5 5 
483 12.2 6 6 
101 2.5 7 7 

37 0.9 8 8 
213 5.4 9 9 

88 2.2 10 10
223 5.6 11 11

LTCCS Codebook CDCCrush Data Set  30 


Codebook - CDCCrush Data Set 

N 

Prcnt 

Code 

Label 
1,166 29.3 12 12 
149 3.8 13 13 

3 0.1 26 26 

4 0.1 32 32 

1 0.0 46 46 

3 0.1 52 52 

3 0.1 61 61 

2 0.1 63 63 

1 0.0 64 64 

1 0.0 66 66 

1 0.0 68 68 

2 0.1 69 69 

2 0.1 70 70 

7 0.2 71 71 

5 0.1 81 81 

5 0.1 82 82 

3 0.1 83 83 

1 0.0 86 86 

1 0.0 88 88 

1 0.0 89 89 

1 0.0 90 90 

10 0.3 92 92
223 5.6 99 99 

Variable Name 

Format 

Type 

Length 

ML82F 

Numeric 

8

OverrideDesc 

Definition: Indicates that this vehicle overrode or underrode another vehicle. Override is coded 
when this vehicle overrides (i.e. goes on top of) the bumper of another vehicle, and underride is 
coded when this vehicle underrides (i.e. goes below) the bumper of another vehicle. For 
override/underride in combination cases (CDS/Truck cases), the attribute Medium/heavy truck or 
bus override is used. 

N 

Prcnt 

Code 

Label 
3,374 84.9 1 None 

3 0.1 2 Override 

4 0.1 3 Underride 

88 2.2 4 Medium/heavy truck or bus over
130 3.3 11 Underride, compartment intrusion

77 1.9 12 Underride, no compartment intrusion 

6 0.2 13 Underride, compartment intrusion unknown 
229 5.8 14 Override, motor vehicle in transport

LTCCS Codebook CDCCrush Data Set  31 


Codebook - CDCCrush Data Set 

N 

Prcnt 

Code 

Label 

7 0.2 15 Override, motor vehicle not in transport 
55 1.4 16 Unknown 
Variable Name 

Format 

Type 

Length 

$OT8F 

Char 

1

DeformLocation 

Definition: Documents the initial plane of contact to the vehicle and represents the general area of 
the vehicle. This is the third column in a coded CDC/TDC. 

N 

Prcnt 

Code 

Label 

43 1.1 9 Unknown
528 13.3 B Back of unit w/ cargo area
42 1.1 C Rear of cab 
21 0.5 D Back -rear of tractor 
1,538 38.7 F Front 
838 21.1 L Left Side 
712 17.9 R Right Side 
157 4.0 T Top 

48 1.2 U Undercarriage 
46 1.2 V Front of cargo area 
Format 

Type 

Length

Variable Name 

$50 

Char 

50

DeformLong 

Definition: Documents the lateral or longitudinal area of the vehicle that contains the contact 
deformation. This is the fourth column in a coded CDC/TDC.

N 

Prcnt 

Code 

Label
370 9.3 * 9 Unknown

13 0.3 * B Rear Section
102 2.6 * B Side Rear -left or right
69 1.7 * B Side rear of cab to rear of trailer/cargo area 
24 0.6 * C Center -front or rear 
76 1.9 * D Distributed -(F+P+B) 
1,250 31.5 * D Distributed -side or end 
6 0.2 * F Front Section 
61 1.5 * F Side Front -frontof windshield 
81 2.0 * F Side Front -left or right 
20 0.5 * K Side(P + W)
373 9.4 * L Left -front or rear
12 0.3 * P Center Section 
63 1.6 * P Side cab 
53 1.3 * P Side center section L or R 
LTCCS Codebook CDCCrush Data Set  32 


Codebook - CDCCrush Data Set 

N 

Prcnt 

Code 

Label
310 7.8 * R Right -front or rear

14 0.4 * S Side(F + P + W)
299 7.5 * T Trailer
37 0.9 * W Side rear of cab to rear of tractor
397 10.0 * Y Side (F + P) OR End (L + C)
18 0.5 * Y Side Front/Center Section (F+P)
315 7.9 * Z Side (P + B) OR End (C + R)
10 0.3 * Z Side Center/Rear Section(P+B) 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Format 

Type 

Length

Variable Name 

$50 

Char 

50

DeformVertical 

Definition: Documents either the vertical or lateral area of the vehicle that contains the contact 
deformation. The vertical location is used for vertical planes (F, B, L, R) and the lateral location is 
used for horizontal planes (T, U). This is the fifth column in a coded CDC/TDC. 

N 

Prcnt 

Code 

Label
388 9.8 * 9 Unknown
450 11.3 * A All
453 11.4 * A Top to Bottom of vehicle / no wheels

20 0.5 * B Belt Line and above 
5 0.1 * C Center
108 2.7 * D Distributed
958 24.1 * E Everything below belt line
846 21.3 * E belt line and below
133 3.3 * F Belt line/below on trailer
42 1.1 * G Belt line and above 
30 0.8 * H Top of frame to top 
49 1.2 * H Top of frame to top of vehicle 
40 1.0 * L Frame --top of frame,frame, bottom of frame 
13 0.3 * L Left
202 5.1 * L Low -top of frame, frame, and bottom of frame 
60 1.5 * M Middle --top of frame to belt line or hood 
10 0.3 * R Right 
5 0.1 * T Everything above cab 
16 0.4 * T Trailer
122 3.1 * W Below undercarriage level ( wheels and tires only)
16 0.4 * Y Left and Center (L+C) 
7 0.2 * Z Right and Center(R+C) 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

LTCCS Codebook CDCCrush Data Set  33 


Codebook - CDCCrush Data Set 

Format 

Type 

Length

Variable Name 

$OT7F 

Char 

1

DeformDistribution 

Definition: Documents the general type of damage distribution for the impact. This classification 
provides a qualitative description of the type of damage sustained by the vehicle. This is the sixth 
column of a coded CDC/TDC. 

N 

Prcnt 

Code 

Label
461 11.6 9 Unknown

34 0.9 A Overhanging Structure
230 5.8 E Corner
4 0.1 K Conversion in Impact Type
190 4.8 N Narrow Impact Area
314 7.9 O Rollover (include side)
11 0.3 R Override
196 4.9 S Sideswipe
22 0.6 U No residual deformation 
2,511 63.2 W Wide Impact Area 
Format 

Type 

Length

Variable Name 

$OT9F 

Char 

10

DeformExtent 

Definition: Documents the extent of damage for the impact. The extent of residual deformation is 
classified using a nine-zone extent system. Extent is a mathematical determination of which zone the 
crush extends into, beginning with Zone 1. This is the seventh column of a coded CDC/TDC. 

N 

Prcnt 

Code 

Label
457 11.5 0A 0A

67 1.7 0B 0B 
17 0.4 0C 0C 
13 0.3 0D 0D 
10 0.3 0X 0X 
47 1.2 Eight Eight 
94 2.4 Five Five
158 4.0 Four Four
118 3.0 Nine Nine
1,069 26.9 One One 

98 2.5 Seven Seven
127 3.2 Six Six
413 10.4 Three Three
623 15.7 Two Two
662 16.7 Unknown Unknown 
LTCCS Codebook CDCCrush Data Set  34 


Codebook - CDCCrush Data Set 

Format 

Type 

Length

Variable Name 

$15 

Char 

15

DeformCode 

Definition: Identifies the direction from which the principal force is applied for a particular impact. 
The direction of force is based on the face of a clock (e.g. an impact to the front bumper is classified 
as 12) and is the first two columns of each impacts CDC/TDC. 

N 

Prcnt 

Code 

Label 

4 0.1 * 00999999 
1 0.0 * 00999O03 
1 0.0 * 00999O99 
2 0.1 * 009T9999 
1 0.0 * 00B9990A 
3 0.1 * 00B99999 
1 0.0 * 00BDAW03 
1 0.0 * 00BDAW99 
1 0.0 * 00BDEW99 
1 0.0 * 00BDFW0A 
------------------------------
1 0.0 * 99RW9999 
1 0.0 * 99RYAN01 
1 0.0 * 99RZEW09 
1 0.0 * 99RZEW99 
1 0.0 * 99TDDW08 
1 0.0 * 99U99901 
1 0.0 * 99U99999 
1 0.0 * 99UT9W99 
1 0.0 * 99V99999 
1 0.0 * 99VT990X 
Note: Asterisk in code column indicates that stored value is the same as the value in the label column. 

Format 

Type 

Length

Variable Name 

BEST8 

Numeric 

8

ImpactNumber 

Definition: Identifies each particular impact in the crush profile for a vehicle. 

N 

Prcnt 

Code 

Label 

1,799 45.3 1 1 
831 20.9 2 2 
374 9.4 3 3 
153 3.9 4 4 

50 1.3 5 5 
23 0.6 6 6 
12 0.3 7 7 
5 0.1 8 8 
726 18.3 9 9 
LTCCS Codebook CDCCrush Data Set  35 


Codebook - CDCCrush Data Set 

Variable Name 

Format 

Type 

Length 

$50 

Char 

50

DamageLocation 

Definition: Describes the location of the direct damage on the vehicle for each impact. This 

information is used to determine the CDC/TDC for the impact. 

N 

Prcnt 

Code 

Label 

1 0.0 * #3 axle left wheel 
1 0.0 * #4 and #5 left side wheels 
1 0.0 * #4 inside wheel right 
1 0.0 * #4 outside wheel right 
1 0.0 * -begins LF corner inward 
1 0.0 * 0 TO 120 CM FROM RIGHT REAR BC 
1 0.0 * 0 TO 140 CM FROM RIGHT REAR BC 
1 0.0 * 0 TO 170 FROM FRT LEFT BC 
1 0.0 * 0 TO 70 CM FROM FRONT RIGHT BC 
1 0.0 * 0-110 CM FORWARD FRT AXLE 
------------------------------
1 0.0 * wheel/axle damage 
4 0.1 * whole front 
2 0.1 * whole front bumper 
1 0.0 * whole front end 
1 0.0 * whole left side and roof 
1 0.0 * whole left side of vehicle 
1 0.0 * whole rear bumper guard 
1 0.0 * whole right side 
1 0.0 * whole underguard 
1 0.0 * windshield 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Format 

Type 

Length

Variable Name 

$50 

Char 

50

FieldLocation 

Definition: Describes the location of the Field L on the vehicle. Field L represents direct and induced 
deformation. This information is used to determine the CDC/TDC for the impact. 

N 

Prcnt 

Code 

Label 

1 0.0 * #3 axle left wheel 
1 0.0 * #4 & #5 left side wheels 
1 0.0 * #4 inside wheel right 
1 0.0 * #4 outside wheel right 
1 0.0 * #7 right tire 
1 0.0 * ----
LTCCS Codebook CDCCrush Data Set  36 


Codebook - CDCCrush Data Set 

N 

Prcnt 

Code 

Label 

1 0.0 * 0-110 CM FORWARD FRT AXLE 
1 0.0 * 0-110 CM FWD FRT AXLE 
1 0.0 * 0-290 CM BEHIND FRT AXLE 
1 0.0 * 0-60CM FROM RT RR CORNER OF TRAILER 
------------------------------
2 0.1 * whole front 
11 0.3 * whole front bumper 
2 0.1 * whole front end 
1 0.0 * whole left side and roof 
1 0.0 * whole left side of vehicle 
1 0.0 * whole rear 
2 0.1 * whole rear bumper 
1 0.0 * whole rear bumper guard 
1 0.0 * whole right side 
1 0.0 * whole underguard 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Variable Name 

Format 

Type 

Length 

$50 

Char 

50

MaxCrushLocation 

Definition: Describes the location in the crush profile of the maximum crush of this impact to the 
vehicle. This information is used to determine the CDC/TDC for the impact. 

N 

Prcnt 

Code 

Label 

1 0.0 * # 
1 0.0 * #3 axle left wheel 
1 0.0 * #4 left outside wheel 
1 0.0 * #5 axle 
1 0.0 -
10 0.3 * --
11 0.3 * --
4 0.1 * ---
1 0.0 * ----
1 0.0 * -----
------------------------------
1 0.0 * whole front bumper 
1 0.0 * windshield header 90cm left of rt A pillar 
1 0.0 * xxx 
5 0.1 * zone 
8 0.2 * zone 
8 0.2 * zone 
3 0.1 * zone 
1 0.0 * zone 
LTCCS Codebook CDCCrush Data Set  37 


Codebook - CDCCrush Data Set 

N 

Prcnt 

Code 

Label 

2 0.1 * zone 6 
1 0.0 * zone 9 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Variable Name 

Format 

Type 

Length 

ML119F 

Numeric 

8

CDCCategory

Definition: Describes the information provided by columns 3-7 in a coded CDC/TDC.
N 

Prcnt 

Code 

Label 
1,194 30.1 1 Side 
1,832 46.1 2 End 

133 3.3 3 Top (specify) 

44 1.1 4 Under (specify)
724 18.2 97 Not Applicable
46 1.2 99 Unknown 
Variable Name 

Format 

Type 

Length 

BEST8 

Numeric 

8

CDCWidth 

Definition: Indicates the direct damage width in centimeters. This is a measured value on the 
vehicle that is used in determining the CDC/TDC for this impact/event. 

N 

Prcnt 

Code 

Label 

2 0.1 0 0 
2 0.1 1 1 
2 0.1 3 3 
1 0.0 4 4 
5 0.1 5 5 
3 0.1 6 6 
7 0.2 7 7 
3 0.1 8 8 
2 0.1 9 9 
17 0.4 10 10 
------------------------------
1 0.0 2200 2200 
1 0.0 2225 2225 
1 0.0 2249 2249 
1 0.0 2250 2250 
1 0.0 2260 2260 
1 0.0 2280 2280 
2 0.1 2300 2300 
1 0.0 2615 2615 
LTCCS Codebook CDCCrush Data Set  38 


Codebook - CDCCrush Data Set 

N Prcnt Code Label 
728 18.3 9997 9997 
1,253 31.5 9999 9999 

LTCCS Codebook CDCCrush Data Set  39 


Codebook - Crash Data Set 

Crash Data Set 

The Crash data set contains all details that are related to the crash itself, and not individual vehicles 
involved in the crash. There is one record per crash. The fields contained in this data set cover all the 
higher-level aspects of each case, such as highest injury severities. 

The Crash data set contains the variables CaseID, PSU, PSUStrat and RATWeight. CaseID 
uniquely identifies each record in this data set and should be used to merge the Crash data set with 
other data sets. 

Format 

Type 

Length

Variable Name 

$10 

Char 

10

CrashDate 

Definition: Identifies the date of the crash.
N 

Prcnt 

Code 

Label 

25 2.3 * 2001-01-01 
19 1.8 * 2001-02-01 
31 2.9 * 2001-03-01 
29 2.7 * 2001-04-01 
30 2.8 * 2001-05-01 
38 3.6 * 2001-06-01 
25 2.3 * 2001-07-01 
31 2.9 * 2001-08-01 
25 2.3 * 2001-09-01 
42 3.9 * 2001-10-01 
------------------------------
38 3.6 * 2003-03-01 
33 3.1 * 2003-04-01 
31 2.9 * 2003-05-01 
31 2.9 * 2003-06-01 
31 2.9 * 2003-07-01 
22 2.1 * 2003-08-01 
19 1.8 * 2003-09-01 
30 2.8 * 2003-10-01 
21 2.0 * 2003-11-01 
26 2.4 * 2003-12-01 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

LTCCS Codebook Crash Data Set  40 


Codebook - Crash Data Set 

Format 

Type 

Length

Variable Name 

$6 

Char 

6

CrashTime 

Definition: Identifies the time of day of the crash.
N 

Prcnt 

Code 

Label 

1 0.1 * 00:03 
1 0.1 * 00:08 
1 0.1 * 00:10 
1 0.1 * 00:15 
2 0.2 * 00:20 
2 0.2 * 00:25 
1 0.1 * 00:29 
1 0.1 * 00:30 
1 0.1 * 00:31 
1 0.1 * 00:35 
------------------------------
1 0.1 * 22:45 
3 0.3 * 22:52 
2 0.2 * 22:55 
1 0.1 * 23:00 
1 0.1 * 23:11 
1 0.1 * 23:25 
3 0.3 * 23:30 
1 0.1 * 23:55 
1 0.1 * 23:57 
1 0.1 * 23:58 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Format 

Type 

Length

Variable Name 

BEST8 

Numeric 

8

VehicleCount 

Definition: Documents the total number of vehicles that were involved in the crash. This includes all 
CDS, non-CDS, in-transport, and not in-transport vehicles. 

N 

Prcnt 

Code 

Label
273 25.5 1 1 
545 50.9 2 2 
164 15.3 3 3 

53 5.0 4 4 
21 2.0 5 5 
10 0.9 6 6 
2 0.2 7 7 
1 0.1 8 8 
1 0.1 30 30 
LTCCS Codebook Crash Data Set  41 


Codebook - Crash Data Set 

Variable Name 

Format 

Type 

Length 

BEST8 

Numeric 

8

TruckCount 

Definition: Represents the total number of heavy trucks involved in the crash. 
N 

Prcnt 

Code 

Label
937 87.6 1 1 
109 10.2 2 2 

14 1.3 3 3 

6 0.6 4 4 

4 0.4 5 5 

Variable Name 

Format 

Type 

Length 

BEST8 

Numeric 

8

CarCount 

Definition: Represents the total number of passenger vehicles involved in the crash. 
N 

Prcnt 

Code 

Label
343 32.1 0 0 
543 50.7 1 1 
127 11.9 2 2 

40 3.7 3 3 

8 0.7 4 4 

6 0.6 5 5 

1 0.1 6 6 

1 0.1 7 7 

1 0.1 28 28 

Format 

Type 

Length

Variable Name 

BEST8 

Numeric 

8

NonMotoristCount 

Definition: Identifies the number of nonmotorists involved in the crash. 
N 

Prcnt 

Code 

Label 
1,025 95.8 0 0 

42 3.9 1 1 

2 0.2 2 2 

1 0.1 7 7 

LTCCS Codebook Crash Data Set  42 


Codebook - Crash Data Set 

Format 

Type 

Length

Variable Name 

$50 

Char 

50

CrashType 

Definition: This variable is a combination of two variables separated by -+-. The first is a 
description of the overall crash scenario. The second is a general description of the crash 
configuration. 

N 

Prcnt 

Code 

Label 

1 0.1 * -+
1 0.1 * Angle -+-Vehicle to vehicle 
1 0.1 * Bus / Tractor Trailer -+-Rear End 
1 0.1 * CAR VS. TRUCK -+-SIDE IMPACT 
1 0.1 * CAR / CAR / TRUCK -+-MULTIPLE IMPACTS 
1 0.1 * CAR / TRUCK -+-HEAD-ON 
1 0.1 * CAR VS DUMP TRUCK -+-TURN INTO PATH 
1 0.1 * CAR VS Tractor trailer -+-sideswipe same direction 
1 0.1 * CAR, PICK UP, TRACTOR TRAILER -+-MUTIPLE IMPACTS 
1 0.1 * CAR/ STRAIGHT TRUCK TRAILER -+-REAREND 
------------------------------
1 0.1 * vehicle to vechile -+-angle/sideswipe 
4 0.4 * vehicle to vehicle -+-angle 
1 0.1 * vehicle to vehicle -+-angle / sideswipe 
1 0.1 * vehicle to vehicle -+-angle/ sideswipe 
2 0.2 * vehicle to vehicle -+-angle/sideswipe 
1 0.1 * vehicle to vehicle -+-noncollision 
3 0.3 * vehicle to vehicle -+-rear end 
1 0.1 * vehicle to vehicle -+-rear-end 
1 0.1 * vehicle to vehicle -+-rollover 
1 0.1 * vehicleto object -+- Angle/sideswipe 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Format 

Type 

Length

Variable Name 

OT10F 

Numeric 

8

CrashPARSevCode 

Definition: Represents the highest injury severity rating in the case, as determined by police on the 
Police Accident Report (PAR). 

N 

Prcnt 

Code 

Label 

18 1.7 0 O -No injury
128 12.0 1 C -Possible injury
339 31.7 2 B -Non-incapacitating injury
336 31.4 3 A -Incapacitating injury
238 22.2 4 K -Killed
7 0.7 5 U -Injury, severity unknown 
LTCCS Codebook Crash Data Set  43 


Codebook - Crash Data Set 

N Prcnt Code Label 
3 0.3 6 Died prior to crash 
1 0.1 9 Unknown 
Variable Name Format Type Length 
CrashRESSevCode OT10F Numeric 8 

Definition: Represents the highest injury severity rating in the case, as determined by injury coding 
and case narratives. This code is based on occupant medical records and/or case narratives and 
may differ from the police-reported injury severity code. 

N 

Prcnt 

Code 

Label 

15 1.4 0 O -No injury 
6 0.6 1 C -Possible injury
499 46.6 2 B -Non-incapacitating injury
303 28.3 3 A -Incapacitating injury
242 22.6 4 K -Killed
1 0.1 5 U -Injury, severity unknown 
4 0.4 6 Died prior to crash 
Variable Name 

Format 

Type 

Length 

$15000 

Char 

15000

Summary

Definition: The researchers description of the crash events/sequence. 
N 

Prcnt 

Code 

Label 

1 0.1 * A 1999 Mack CL713 straight dump truck was traveling east in 
1 0.1 * A 2001 Mitsubishi Eclipse, vehicle one, was traveling south on a 
1 0.1 * A 3-vehicle collision occurred in mid June at approximately 1700 
1 0.1 * A 6.8 Richter scale level earthquake had struck the surrounding 
1 0.1 * A collision involving a car and a truck occurred on an urban 
1 0.1 * A collision involving five vehicles occurred during a weekend 
1 0.1 * A collision involving four vehicles occurred at 1040 hours on an 
1 0.1 * A collision involving four vehicles occurred at 1220 hours on a 
1 0.1 * A collision involving four vehicles occurred in the northbound 
1 0.1 * A collision involving four vehicles occurred on a divided six-lane 
------------------------------
1 0.1 * Vehicle two, a 2000 Freightliner, was traveling west in lane three 
1 0.1 * Vehicles 1 and 3 were traveling north in lane one on a dry, 
1 0.1 * Vehicles 1, 2 & 3 were traveling south on a 3 lane, 1 way divided 
1 0.1 * Vehicles 1, 2 and 3 were all traveling west in lane 3 of a 3-lane 
1 0.1 * Vehicles 1, 2, and 3 were stopped facing southbound in lane 3 of 
1 0.1 * Vehicles one and two were traveling southbound on a 55mph, 
1 0.1 * Vehicles one and two were traveling southbound on a wet and 
LTCCS Codebook Crash Data Set  44 


Codebook - Crash Data Set 

N 

Prcnt 

Code 

Label 

1 0.1 * Vehicles one, two, and three were southbound in lane 3 of a 
1 0.1 * Vehicles' one, two and three were all traveling east on a three 
1 0.1 * Vehicles' one, two and three were all traveling west on a 4-lane 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Variable Name 

Format 

Type 

Length 

OT11F 

Numeric 

8

Day

Definition: Identifies the day of the week that the crash occurred. 

N 

Prcnt 

Code 

Label 

40 3.7 1 Sunday
182 17.0 2 Monday
205 19.2 3 Tuesday
203 19.0 4 Wednesday
190 17.8 5 Thursday
183 17.1 6 Friday
67 6.3 7 Saturday 
Format 

Type 

Length

Variable Name 

OT70F 

Numeric 

8

CollisionType 

Definition: Describes the type of vehicles involved in the crash using the following vehicle 
classifications. These classifications are strung together to indicate the number and type of each 
vehicle involved in the crash. 

N 

Prcnt 

Code 

Label 

5 0.5 BUS-TRUCK 
1 0.1 CAR-BUS-TRUCK 
1 0.1 CAR-CAR-CAR-CAR-TRUCK 
2 0.2 CAR-CAR-CAR-OLV-TRUCK 
2 0.2 CAR-CAR-CAR-PICKUP-TRUCK 
6 0.6 CAR-CAR-CAR-TRUCK 
1 0.1 CAR-CAR-CAR-TRUCK-TRUCK 
1 0.1 CAR-CAR-LIGHT TRUCK-TRUCK 
1 0.1 CAR-CAR-LIGHT TRUCK-TRUCK-TRUCK 
2 0.2 CAR-CAR-OLV-TRUCK 
2 0.2 CAR-CAR-PICKUP-TRUCK 
37 3.5 CAR-CAR-TRUCK 
3 0.3 CAR-CAR-TRUCK-TRUCK 
2 0.2 CAR-CAR-TRUCK-TRUCK-TRUCK 
1 0.1 CAR-CAR-VAN-PICKUP-TRUCK 
4 0.4 CAR-CAR-VAN-TRUCK 
1 0.1 CAR-CAR-VAN-TRUCK-TRUCK 
LTCCS Codebook Crash Data Set  45 


Codebook - Crash Data Set 

N 

Prcnt 

Code 

Label 

4 0.4 18 CAR-LIGHT TRUCK-TRUCK 
5 0.5 19 CAR-OLV-OLV-TRUCK 
2 0.2 20 CAR-OLV-PICKUP-TRUCK 
1 0.1 21 CAR-OLV-PICKUP-TRUCK-TRUCK 
17 1.6 22 CAR-OLV-TRUCK 
1 0.1 23 CAR-OLV-TRUCK-MCYCLE 
3 0.3 24 CAR-OLV-TRUCK-TRUCK 
3 0.3 25 CAR-OLV-VAN-TRUCK 
1 0.1 26 CAR-OLV-VAN-TRUCK-TRUCK 
1 0.1 27 CAR-PICKUP-PICKUP-TRUCK 
23 2.1 28 CAR-PICKUP-TRUCK 
1 0.1 29 CAR-PICKUP-TRUCK-TRUCK 
303 28.3 30 CAR-TRUCK 
2 0.2 31 CAR-TRUCK-MCYCLE 
26 2.4 32 CAR-TRUCK-TRUCK 
1 0.1 33 CAR-TRUCK-TRUCK-MCYCLE 
4 0.4 34 CAR-TRUCK-TRUCK-TRUCK 
1 0.1 35 CAR-TRUCK-TRUCK-TRUCK-TRUCK 
3 0.3 36 CAR-VAN-PICKUP-TRUCK 
1 0.1 37 CAR-VAN-PICKUP-TRUCK-TRUCK 
10 0.9 38 CAR-VAN-TRUCK 
2 0.2 39 CAR-VAN-TRUCK-TRUCK 
1 0.1 40 CAR-VAN-VAN-VAN-TRUCK 
1 0.1 41 LIGHT TRUCK-TRUCK 
1 0.1 42 LIGHT TRUCK-TRUCK-TRUCK 
14 1.3 43 MULTI VEHICLE 
2 0.2 44 OLV-OLV-TRUCK 
1 0.1 45 OLV-PICKUP-PICKUP-TRUCK-TRUCK 
4 0.4 46 OLV-PICKUP-TRUCK 
55 5.1 47 OLV-TRUCK 
5 0.5 48 LV-TRUCK-TRUCK 
2 0.2 49 OLV-TRUCK-TRUCK-TRUCK 
1 0.1 50 OLV-VAN-PICKUP-TRUCK 
5 0.5 51 OLV-VAN-TRUCK 
1 0.1 52 PICKUP-PICKUP-PICKUP-TRUCK 
4 0.4 53 PICKUP-PICKUP-TRUCK 
79 7.4 54 PICKUP-TRUCK 
10 0.9 55 PICKUP-TRUCK-TRUCK 
1 0.1 56 PICKUP-TRUCK-TRUCK-TRUCK-TRUCK 
273 25.5 57 TRUCK 
7 0.7 58 TRUCK-MCYCLE 
2 0.2 59 TRUCK-OTHER 
44 4.1 60 TRUCK-TRUCK 
LTCCS Codebook Crash Data Set  46 


Codebook - Crash Data Set 

N 

Prcnt 

Code 

Label 

1 0.1 61 TRUCK-TRUCK-MHOME 
5 0.5 62 TRUCK-TRUCK-TRUCK 
3 0.3 63 TRUCK-TRUCK-TRUCK-TRUCK 
3 0.3 64 TRUCK-TRUCK-TRUCK-TRUCK-TRUCK 
2 0.2 65 VAN-PICKUP-TRUCK 
50 4.7 66 VAN-TRUCK 
1 0.1 67 VAN-TRUCK-MCYCLE 
1 0.1 68 VAN-TRUCK-TRUCK 
2 0.2 69 VAN-VAN-TRUCK 
2 0.2 70 VAN-VAN-TRUCK-TRUCK 
Format 

Type 

Length

Variable Name 

ML2065F 

Numeric 

8

Treatment 

Definition: Represents the highest level of treatment of any occupant in the case. 
N 

Prcnt 

Code 

Label
122 11.4 0 No treatment

20 1.9 1 Dead on Arrival (DOA) at hospital 
30 2.8 2 Dead prior to Admission
379 35.4 3 Hospitalization
457 42.7 4 Transported and released
13 1.2 5 Treatment at scene -non-transported 
15 1.4 6 Treatment later 
22 2.1 7 Transported to a medical facility-unknown if treated 
3 0.3 8 Treatment -other (specify) 
9 0.8 9 Unknown 
Variable Name 

Format 

Type 

Length 

ML4211F 

Numeric 

8

OCCFatality

Definition: Documents if there were any occupant fatalities in the case. 

N Prcnt Code Label 
850 79.4 0 Not Fatal 
206 19.3 1 Fatal 
12 1.1 2 Fatal -ruled disease (specify) 
2 0.2 9 Unknown 

LTCCS Codebook Crash Data Set  47 


Codebook - Crash Data Set 

Variable Name 
CRAAlcohol 
Format 
ML642F 
Type 
Numeric 
Length 
8 
Definition: Documents whether or not alcohol was involved in the crash. 
N Prcnt Code Label 
91 8.5 1 Yes 
852 79.6 2 No 
127 11.9 9 Unknown 
Variable Name 
AnyDrugsCrash 
Format 
ML642F 
Type 
Numeric 
Length 
8 

Definition: Documents whether or not any drugs (legal or illegal) were present or involved in the 

crash. 
N Prcnt Code Label 
610 57.0 1 Yes 
460 43.0 2 No 

LTCCS Codebook Crash Data Set  48 


Codebook - CrashAssessment Data Set 

CrashAssessment Data Set 

The CrashAssessment data set contains assessment information for each vehicle and driver 
involved in the crash. One record of this information exists for each vehicle. 

The CrashAssessment data set contains the variables CaseID, PSU, PSUStrat, RATWeight, and 
VehicleNumber. CaseID and VehicleNumber uniquely identify each record in this data set and 
should be used to merge the CrashAssessment data set with other vehicle level data sets. 

Format 

Type 

Length

Variable Name 

ML657F 

Numeric 

8

PreEventMovement 

Definition: Establishes the subject vehicles pre-critical event movement pattern. The pre-event 
movement pattern is usually described as the point which both precedes the critical precrash 
envelope and which precedes vehicle motions that place the involved vehicle(s) on an imminent 
collision path. 

N 

Prcnt 

Code 

Label 

24 1.1 0 No driver present 
1,141 50.0 1 Going Straight 
155 6.8 2 Decelerating in traffic lane 

33 1.4 3 Accelerating in traffic lane 
14 0.6 4 Starting in traffic lane
296 13.0 5 Stopped in traffic lane
53 2.3 6 Passing or overtaking another vehicle 
3 0.1 7 Disabled or parked in travel lane 
15 0.7 10 Turning right 
36 1.6 11 Turning left 
3 0.1 12 Making a U-turn 
7 0.3 13 Backing up (other than for parking position)
274 12.0 14 Negotiating a curve
86 3.8 15 Changing lanes 
17 0.7 16 Merging 
63 2.8 17 Successful avoidance maneuver to a previous critical event 
26 1.1 98 Other (specify) 
38 1.7 99 Unknown 
Format 

Type 

Length

Variable Name 

ML654F 

Numeric 

8

ACRCriticalEvent 

Definition: Identifies the event which made the crash imminent (i.e. something occurred which 
made the collision inevitable). A precrash critical event is coded for each vehicle in the crash and 
documents the circumstances leading to this vehicles first impact in the crash sequence. 

N Prcnt Code Label 
13 0.6 1 Blow out/flat tire, (specify blow out/flat,location/make) 
7 0.3 3 Disabling vehicle failure (e.g, wheel fell off) Specify: 
5 0.2 4 Non-disabling vehicle problem (e.g., hood flew up) Specify: 

LTCCS Codebook CrashAssessment Data Set  49 


Codebook - CrashAssessment Data Set 

N 

Prcnt 

Code 

Label 

16 0.7 5 Poor road conditions(Puddle,pot hole,ice,etc.) Specify: 
122 5.3 6 Traveling too fast for conditions 
12 0.5 7 Jacknife Event 
26 1.1 8 Other cause of control loss (specify) 
13 0.6 9 Unknown cause of control loss 
131 5.7 10 Over the lane line on left side of travel lane 
63 2.8 11 Over the lane line on right side of travel lane 
42 1.8 12 Off the edge of the road on the left side 
83 3.6 13 Off the edge of the road on the right side 
1 0.0 14 End departure 
76 3.3 15 Turning left at intersection 
22 1.0 16 Turning right at interesection 
76 3.3 17 Crossing over (passing through) intersection 
7 0.3 18 This vehicle decelerating 
119 5.2 50 Other vehicle stopped 
79 3.5 51 Travelling in same direction with low steady speed 
82 3.6 52 Travelling in same direction while decelerating 
252 11.0 53 Traveling in same direction with higher speed 
30 1.3 54 Traveling in opposite direction 
2 0.1 55 In crossover 
2 0.1 56 Backing 
1 0.0 59 Unknown travel direction of other motor vehicle in lane 
91 4.0 60 From adjacent lane (same direction) -over left lane line 
95 4.2 61 From adjacent lane (same direction -over right lane line 
110 4.8 62 From opposite direction-over left lane line 
2 0.1 63 From opposite direction -over right lane line 
4 0.2 65 From crossing street, turning into same direction 
68 3.0 66 From crossing street, across path 
22 1.0 67 From crossing street ,turning into opposite direction 
2 0.1 70 From driveway,turning into same direction 
4 0.2 71 From driveway, across path 
5 0.2 72 From driveway, turning into oppsite direction 
1 0.0 74 From enterance to limited access highway 
26 1.1 80 Pedestrian in roadway 
1 0.0 81 Pedestrain approaching roadway 
7 0.3 83 Pedalcyclist or other nonmotorist in roadway (specify): 
1 0.0 87 Animal in roadway 
16 0.7 90 Object in roadway 
41 1.8 98 Other (Specify) 
14 0.6 100 Cargo Shift 
492 21.5 125 Not involved first harmful event 
LTCCS Codebook CrashAssessment Data Set  50 


Codebook - CrashAssessment Data Set 

Format 

Type 

Length

Variable Name 

ML4123F 

Numeric 

8

CriticalEventCat 

Definition: Groups the individual attributes of the Critical Precrash Event into categories. These 
categories are helpful in deciding the critical precrash event. 

N 

Prcnt 

Code 

Label
228 10.0 1 This vehicle loss of control
501 21.9 2 This vehicle traveling
567 24.8 3 Other motor vehicle in lane
404 17.7 4 Other motor vehicle encroaching into lane

34 1.5 5 Pedestrian, pedacyclist, or other nonmotorist 
17 0.7 6 Object or animal 
41 1.8 7 Other (specify)
492 21.5 9 This vehicle not involved in first harmful event 
Format 

Type 

Length

Variable Name 

ML655F 

Numeric 

8

ACRReason 

Definition: Establishes the critical reason for the occurrence of the critical event. The critical reason 
is the immediate reason for this event and is often the last failure in the causal chain (i.e. closest in 
time to the critical precrash event). Although the critical reason is an important part of the description 
of crash events, it is not the cause of the crash nor does it imply the assignment of fault. 

N 

Prcnt 

Code 

Label 
1,229 53.8 0 Critical event not coded to this vehicle 

59 2.6 100 Sleep, that is, actually asleep 
40 1.8 101 Heart attack or other physical impairment of the ability to act 
3 0.1 108 Other critical non-performance (specify) 
6 0.3 109 Unknown critical non-performance 
59 2.6 110 Inattention (i.e., daydreaming) 
43 1.9 111 Internal distraction 
28 1.2 112 External distraction
138 6.0 113 Inadequate surveillance (e.g., failed to look, looked but did not 
3 0.1 118 Other recognition error (specify) 
53 2.3 119 Unknown recognition error 
69 3.0 120 Too fast for conditions to be able to respond to unexpected 
2 0.1 121 Too slow for traffic stream 
36 1.6 122 Misjudgment of gap or other's speed 
34 1.5 123 Following too closely to respond to unexpected actions 
22 1.0 124 False assumption of other road user's actions 
44 1.9 125 Illegal maneuver 
6 0.3 127 Inadequate evasive action, e.g. braking only, not braking and 
23 1.0 128 Aggressive driving behavior 
20 0.9 138 Other decision error (specify) 
3 0.1 139 Unknown decision error 
LTCCS Codebook CrashAssessment Data Set  51 


Codebook - CrashAssessment Data Set 

N 

Prcnt 

Code 

Label 

63 2.8 140 Too fast for curve/turn 
1 0.0 141 Panic/Freezing 
40 1.8 142 Overcompensation 
38 1.7 143 Poor directional control e.g., failing to control vehicle with skill 
2 0.1 149 Unknown performance error 
98 4.3 199 Type of driver error unknown 
16 0.7 200 Tires/wheels failed 
8 0.4 201 Brakes failed 
1 0.0 202 Steering failed 
17 0.7 203 Cargo shifted 
1 0.0 204 Trailer attachment failed 
2 0.1 205 Suspension failed 
1 0.0 208 Body, doors, hood failed 
2 0.1 298 Other vehicle failure (specify) 
1 0.0 299 Unknown vehicle failures 
1 0.0 500 Signs/signals missing 
1 0.0 504 View obstructed by other vehicles 
1 0.0 505 Road design -roadway geometry (e.g., ramp curvature) 
1 0.0 507 Road design -other 
20 0.9 509 Slick roads (low friction road surface due to ice, loose debris, any 
1 0.0 518 Other highway-related condition (specify) 
1 0.0 522 Fog 
2 0.1 523 Wind gust 
7 0.3 530 Glare 
18 0.8 540 Degraded braking capability 
3 0.1 541 Transmission/engine failure 
17 0.7 999 Unknown reason for critical event 
Variable Name 

Format 

Type 

Length 

OT1F 

Numeric 

8

ReasonCat 

Definition: Groups the attributes for the variable Critical Reason for the Critical Event variable into 
categories. 

N 

Prcnt 

Code 

Label 

1,229 53.8 0 No Driver Error 
108 4.7 Physical Driver Factor 
324 14.2 Driver Recognition Factor 
322 14.1 Driver Decision Factor 
179 7.8 Driver Performance Factor 

70 3.1 Vehicle Related Factor 
25 1.1 Environment -Highway 
LTCCS Codebook CrashAssessment Data Set  52 


Codebook - CrashAssessment Data Set 

N 

Prcnt 

Code 

Label 

10 0.4 7 Environment -Weather 
17 0.7 99 Unknown Reason 
Variable Name 

Format 

Type 

Length 

ML656F 

Numeric 

8

ACRAvoidance 

Definition: Documents the drivers actions initiated in response to the realization of impending 
danger. Attempted avoidance maneuvers are movements/actions initiated by the subject driver, 
within the crucial crash envelope, in response to a critical precrash event. Attempted avoidance 
maneuvers occur after the driver has realization of an impending danger.

N 

Prcnt 

Code 

Label 

24 1.1 0 No driver present 
1,219 53.4 1 No avoidance maneuver 
137 6.0 2 Braking (no lockup) 
219 9.6 3 Braking (lockup) 

13 0.6 4 Braking (lockup unknown) 
61 2.7 6 Steering left 
72 3.2 7 Steering right
106 4.6 8 Braking and steering left
128 5.6 9 Braking and steering right
21 0.9 10 Accelerating 
8 0.4 11 Accelerating and steering left 
10 0.4 12 Accelerating and steering right
115 5.0 98 Other action (specify)
151 6.6 99 Unknown 
Format 

Type 

Length

Variable Name 

ML659F 

Numeric 

8

ACRStability

Definition: Focuses upon this vehicles dynamics after the critical event. The purpose of this 
variable is to assess the stability of the vehicle after the critical event. The stability of the vehicle prior 
to an avoidance action is not considered except in the following situation: A vehicle that is out of 
control (e.g. yawing clockwise) prior to an avoidance maneuver is coded Other vehicle loss of 
control only if an avoidance action was taken in response to an impending danger. 

N 

Prcnt 

Code 

Label 

24 1.1 0 No driver present 
1,644 72.0 1 Tracking 
368 16.1 2 Skidding longitudinally->rotation less than 30 degrees 

59 2.6 3 Skidding laterally->clockwise rotation 
72 3.2 4 Skidding laterally->counterclockwise rotation 
47 2.1 8 Other vehicle loss-of-control (specify) 
70 3.1 9 Pre-crash stability unknown 
LTCCS Codebook CrashAssessment Data Set  53 


Codebook - CrashAssessment Data Set 

Format 

Type 

Length

Variable Name 

ML658F 

Numeric 

8

ACRLocation 

Definition: Reports the location of the subject vehicle at the point where its pre-impact stability is 
determined.

N 

Prcnt 

Code 

Label 

24 1.1 0 No driver present 
1,431 62.7 1 Stayed in original travel lane 
521 22.8 2 Stayed on roadway but left original travel lane 

10 0.4 3 Stayed on roadway, not known if left original travel lane 
221 9.7 4 Departed roadway
11 0.5 5 Remained off roadway 
24 1.1 6 Returned to roadway 
13 0.6 7 Entered roadway 
29 1.3 9 Unknown 
Format 

Type 

Length

Variable Name 

ML660F 

Numeric 

8

ACRRightOfWay

Definition: Establishes vehicle right-of-way characteristics, from a legal perspective, for the subject 
vehicle. Specifically, did this vehicle have the right-of-way? 

N 

Prcnt 

Code 

Label
581 25.4 1 Yes
401 17.6 2 No

1,295 56.7 88 Not Applicable 

7 0.3 99 Unknown 
Format 

Type 

Length

Variable Name 

BEST8 

Numeric 

8

CrashCode 

Definition: Used in categorizing the collisions of drivers involved in crashes. A collision is defined 
here as the first harmful event in a crash between a vehicle and some object, accompanied by 
property damage or human injury. The object may be another vehicle, a person, an animal, a fixed 
object, the road surface, or the ground. If the first collision is a rollover, the impact is with the ground 
or road surface. The collision may also involve plowing into soft ground, if severe deceleration results 
in damage or injury. A road departure without damage or injury is not defined as a collision. This 
variable encompasses the Configuration variable, which is a component of this variable. 

N 

Prcnt 

Code 

Label 

18 0.8 0 0 
65 2.8 1 1 
43 1.9 2 2 
6 0.3 3 3 
1 0.0 5 5 
LTCCS Codebook CrashAssessment Data Set  54 


Codebook - CrashAssessment Data Set 

N 

Prcnt 

Code 

Label 

38 1.7 6 6 

54 2.4 7 7 

6 0.3 8 8 

1 0.0 9 9 

2 0.1 10 10 

2 0.1 11 11 

3 0.1 12 12 

32 1.4 13 13 

1 0.0 14 14 

8 0.4 15 15 
113 4.9 20 20 
106 4.6 21 21 

7 0.3 22 22 

1 0.0 23 23 

90 3.9 24 24 

85 3.7 25 25 

2 0.1 26 26 

2 0.1 27 27 

61 2.7 28 28 

53 2.3 29 29 

1 0.0 30 30 

7 0.3 31 31 

32 1.4 32 32 

2 0.1 33 33 

4 0.2 42 42 

1 0.0 43 43 

7 0.3 44 44 
105 4.6 45 45 

49 2.1 46 46 

53 2.3 47 47 

54 2.4 48 48 

35 1.5 50 50 

35 1.5 51 51 

10 0.4 52 52 

10 0.4 62 62 

45 2.0 64 64 

45 2.0 65 65 

14 0.6 66 66 

38 1.7 68 68 

38 1.7 69 69 

10 0.4 70 70 

10 0.4 71 71 

10 0.4 72 72 

LTCCS Codebook CrashAssessment Data Set  55 


Codebook - CrashAssessment Data Set 

N Prcnt Code Label 
10 0.4 73 73 
2 0.1 74 74 
4 0.2 76 76 
4 0.2 77 77 
5 0.2 78 78 
5 0.2 79 79 
4 0.2 80 80 
4 0.2 81 81 
30 1.3 82 82 
30 1.3 83 83 
2 0.1 84 84 
31 1.4 86 86 
31 1.4 87 87 
38 1.7 88 88 
38 1.7 89 89 
6 0.3 90 90 
7 0.3 92 92 
4 0.2 93 93 
614 26.9 98 98 
Variable Name Format Type Length 
AccidentCat OT2F Numeric 8 

Definition: Used in categorizing the collisions of drivers involved in crashes. A collision is defined 
here as the first harmful event in a crash between a vehicle and some object, accompanied by 
property damage or human injury. The object may be another vehicle, a person, an animal, a fixed 
object, the road surface, or the ground. If the first collision is a rollover, the impact is with the ground 
or road surface. The collision may also involve plowing into soft ground, if severe deceleration results 
in damage or injury. A road departure without damage or injury is not defined as a collision. This 
variable is part of the larger variable Crash Type. The Crash Type variable is actually broken 
down into three components: the crash category, the crash configuration, and the accident type. 
This variable only deals with the configuration of the crash. 

N 

Prcnt 

Code 

Label
115 5.0 1 Right Roadside Departure
562 24.6 2 Rear-End

80 3.5 3 Head-On
118 5.2 4 Turn Across Path
144 6.3 5 Straight Paths
104 4.6 6 Same Trafficway Opposite Directions -Sideswipe/Angle 
101 4.4 7 Left Roadside Departure
5 0.2 8 Same Trafficway Same Direction -Forward Impact 
10 0.4 9 Same Trafficway Opposite Directions -Forward Impact 
88 3.9 10 Turn Into Path 
46 2.0 11 Single Driver -Forward Impact 
LTCCS Codebook CrashAssessment Data Set  56 


Codebook - CrashAssessment Data Set 

N 

Prcnt 

Code 

Label 
268 11.7 12 Same Trafficway Same Direction -Sideswipe/Angle 
643 28.2 13 Miscellaneous 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

ACRJackknife 

Definition: Documents the presence/absence of a jackknife for this vehicle. 
N Prcnt Code Label 
2,223 97.3 0 Absent 
61 2.7 1 Present 
Variable Name 
ACRCargoshift 
Format 
AP1U 
Type 
Numeric 
Length 
8 

Definition: Documents the presence/absence of a cargo shift for this vehicle. 

N Prcnt Code Label 
2,241 98.1 0 Absent 
43 1.9 1 Present 

LTCCS Codebook CrashAssessment Data Set  57 


Codebook - CrashDiscussion Data Set 

CrashDiscussion Data Set 

The CrashDiscussion data set contains the assessment summary for each vehicle and driver in the 
crash. This material is provided as one record per vehicle. 

The CrashDiscussion data set contains the variables CaseID, PSU, PSUStrat, RATWeight, and 
VehicleNumber. CaseID and VehicleNumber uniquely identify each record in this data set and 
should be used to merge the CrashDiscussion data set with other vehicle level data sets. 

Format 

Type 

Length

Variable Name 

$21000 

Char 

21000

Discussion 

Definition: The Case Summary is intended to provide a detailed description of the crash sequence 
including precrash vehicle movement patterns and driver precrash actions. In addition to describing 
crash events for each vehicle/driver, the summary is intended to provide a detailed accounting of all 
causal-related information for this vehicle/driver. This includes describing the critical precrash event, 
the critical reason for the critical event, and all critical event associated factors. 

N 

Prcnt 

Code 

Label 

1 0.0 * . Vehicle 1 was a 1988 Ford LTD Crown Victoria with 3 
1 0.0 * 1999 Toyota Tacoma pickup truck The driver of the 1999 Toyota 
1 0.0 * A 2001 Freightliner Towing a van semi-trailer (Vehicle 2) and a 
1 0.0 * A 2001 Freightliner Towing a van semi-trailer (Vehicle 2) and a 
1 0.0 * A 2001 Mitsubishi Eclipse, vehicle one, was traveling south on a 
1 0.0 * A 2001 Mitsubishi Eclipse, vehicle one, was traveling south on a 
1 0.0 * A 3-vehicle collision occurred in mid June at approximately 1700 
1 0.0 * A 3-vehicle collision occurred in mid June at approximately 1700 
1 0.0 * A 3-vehicle collision occurred in mid June at approximately 1700 
1 0.0 * A collision involving four vehicles occurred at 1040 hours on an 
------------------------------
1 0.0 * Vehicle two is a 1998 Pontiac Grand Prix. Vehicle two was 
1 0.0 * Vehicle two was a 1983 Peterbilt conventional tractor with a 
1 0.0 * Vehicle two was a 1994 Ford medium/heavy flatbed straight 
1 0.0 * Vehicle two was a 1995 Western Star truck with a flat bed trailer 
1 0.0 * Vehicle two was a 2001 Freightliner F80 straight truck with a 
1 0.0 * Vehicle two, a 1989 Freightliner pulling one trailer, was traveling 
1 0.0 * Vehicle two, a 1995 Ford L8000 two-axle straight truck, traveling 
1 0.0 * Vehicle two, a 1999 Peterbilt tractor with one refrigerated van 
1 0.0 * Vehicle two, a 1999 single unit straight truck, was negotiating a 
1 0.0 * Vehicle two, a 1999 single unit straight truck, was negotiating a 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

LTCCS Codebook CrashDiscussion Data Set  58 


Codebook - DMVViolation Data Set 

DMVViolation Data Set 

The DMVViolation data set contains information on the drivers prior record of motor vehicle 
violations. One record is provided for each violation and is stored for each vehicle/driver where this 
information is available. 

The DMVViolation data set contains the variables CaseID, PSU, PSUStrat, RATWeight, 
VehicleNumber and DriverNumber. CaseID and VehicleNumber should be used to merge the 
DMVViolation data set with vehicle level data sets. DriverNumber is used to uniquely identify each 
driver, however, since a driver can have more than one violation and be involved in more than one 
crash, this variable does not uniquely identify each record. 

Variable Name 

Format 

Type 

Length 

BEST8 

Numeric 

8

ViolationNumber 

Definition: Identifies the violation number. 
N Prcnt 

Code 

Label
983 20.9 1 1 
728 15.4 2 2 
550 11.7 3 3 
437 9.3 4 4 
350 7.4 5 5 
285 6.0 6 6 
235 5.0 7 7 
189 4.0 8 8 
148 3.1 9 9 
121 2.6 10 10 
------------------------------

5 0.1 29 29 

4 0.1 30 30 

3 0.1 31 31 

3 0.1 32 32 

2 0.0 33 33 

1 0.0 34 34 

1 0.0 35 35 

1 0.0 36 36 

1 0.0 37 37 

1 0.0 38 38 

LTCCS Codebook DMVViolation Data Set  59 


Codebook - DMVViolation Data Set 

Format 

Type 

Length

Variable Name 

$2 

Char 

2

LicState 

Definition: Identifies the State in which the drivers (driving) license was issued. 
N 

Prcnt 

Code 

Label
567 12.0 * AL

1 0.0 * AR
129 2.7 * CA
280 5.9 * CO
8 0.2 * DE
334 7.1 * FL
135 2.9 * GA
10 0.2 * IA 
3 0.1 * ID 
68 1.4 * IL 
195 4.1 * IN
3 0.1 * KS 
4 0.1 * KY 
11 0.2 * LA 
13 0.3 * MA
263 5.6 * MD
7 0.1 * ME
292 6.2 * MI
15 0.3 * MN 
1 0.0 * MO 
13 0.3 * MS 
2 0.0 * MT
442 9.4 * NC
27 0.6 * NE
456 9.7 * NJ
15 0.3 * NM 
1 0.0 * NV
188 4.0 * NY
120 2.5 * OH
25 0.5 * OK 
9 0.2 * OR
388 8.2 * PA
80 1.7 * SC
189 4.0 * TN
222 4.7 * TX
1 0.0 * UK 
12 0.3 * UT 
LTCCS Codebook DMVViolation Data Set  60 


Codebook - DMVViolation Data Set 

N 

Prcnt 

Code 

Label 

14 0.3 * VA
140 3.0 * WA
12 0.3 * WI 
10 0.2 * WV 
7 0.1 * WY 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Format 

Type 

Length

Variable Name 

$10 

Char 

10

CitDate 

Definition: Identifies the date that the driver received a citation for a particular violation. 
N 

Prcnt 

Code 

Label 

1 0.0 * 1962-04-01 
1 0.0 * 1963-11-01 
1 0.0 * 1965-03-01 
1 0.0 * 1965-05-01 
1 0.0 * 1966-02-01 
1 0.0 * 1966-08-01 
1 0.0 * 1967-11-01 
2 0.0 * 1968-06-01 
1 0.0 * 1969-09-01 
1 0.0 * 1969-10-01 
------------------------------
8 0.2 * 2003-04-01 
21 0.4 * 2003-05-01 
22 0.5 * 2003-06-01 
15 0.3 * 2003-07-01 
11 0.2 * 2003-08-01 
6 0.1 * 2003-09-01 
16 0.3 * 2003-10-01 
6 0.1 * 2003-11-01 
5 0.1 * 2003-12-01 
3 0.1 * 9999-99-99 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

LTCCS Codebook DMVViolation Data Set  61 


Codebook - DMVViolation Data Set 

Format 

Type 

Length

Variable Name 

$10 

Char 

10

ConvDate 

Definition: Identifies the date that the driver was convicted of a particular violation.
N 

Prcnt 

Code 

Label 

1 0.0 * 1963-12-01 
1 0.0 * 1965-03-01 
1 0.0 * 1965-07-01 
1 0.0 * 1966-02-01 
1 0.0 * 1966-09-01 
1 0.0 * 1967-12-01 
1 0.0 * 1968-06-01 
1 0.0 * 1968-07-01 
1 0.0 * 1969-10-01 
1 0.0 * 1969-11-01 
------------------------------
22 0.5 * 2003-09-01 
20 0.4 * 2003-10-01 
11 0.2 * 2003-11-01 
10 0.2 * 2003-12-01 
6 0.1 * 2004-01-01 
11 0.2 * 2004-02-01 
11 0.2 * 2004-03-01 
2 0.0 * 2004-05-01 
1 0.0 * 2004-07-01 
24 0.5 * 9999-99-99 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Format 

Type 

Length

Variable Name 

$5 

Char 

5

ACDcode 

Definition: Represents Department Of Motor Vehicle (DMV) violation codes. 
N 

Prcnt 

Code 

Label
635 13.5 * 

1 0.0 * ??? 
4 0.1 * A04 
2 0.0 * A08 
15 0.3 * A10 
1 0.0 * A11 
5 0.1 * A12 
49 1.0 * A20 
44 0.9 * A21 
LTCCS Codebook DMVViolation Data Set  62 


Codebook - DMVViolation Data Set 

N 

Prcnt 

Code 

Label 

2 0.0 * A22 
------------------------------
83 1.8 * S94 
2 0.0 * S95 
30 0.6 * S96 
1 0.0 * SC2 
1 0.0 * SP 
3 0.1 * SP3 
5 0.1 * U01 
1 0.0 * U07 
1 0.0 * U25 
10 0.2 * W10 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Variable Name 

Format 

Type 

Length 

$75 

Char 

75

ACDdetail 

Definition: The 5-digit code that provides further detail of the ACD code.
N 

Prcnt 

Code 

Label
2,788 59.2 * 
103 2.2 * 0 

1 0.0 * 00
167 3.5 * 00000
1 0.0 * 00054 
1 0.0 * 05015 
2 0.0 * 05021 
1 0.0 * 15020 
1 0.0 * 19 
1 0.0 * 20030 
------------------------------
8 0.2 * S11 
21 0.4 * S15 
1 0.0 * S16 
15 0.3 * S51 
28 0.6 * S61 
2 0.0 * S71 
79 1.7 * S93 
13 0.3 * S94 
2 0.0 * S95 
2 0.0 * U06 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

LTCCS Codebook DMVViolation Data Set  63 


Codebook - DMVViolation Data Set 

Format 

Type 

Length

Variable Name 

BEST8 

Numeric 

8

DriverNumber 

Definition Uniquely identifies each driver, however, since a driver can have more than one violation 
and be involved in more than one crash, this variable does not uniquely identify each record. 

N 

Prcnt 

Code 

Label 

1 0.0 1 1 

1 0.0 6 6 

1 0.0 7 7 

4 0.1 10 10 

5 0.1 13 13 

1 0.0 14 14 

3 0.1 15 15 

1 0.0 18 18 

4 0.1 19 19 

13 0.3 20 20 
------------------------------

1 0.0 11319 11319 

5 0.1 11320 11320 

2 0.0 11322 11322 

6 0.1 11338 11338 

13 0.3 11339 11339 

3 0.1 11343 11343 

1 0.0 11351 11351 

1 0.0 11352 11352 

1 0.0 11356 11356 

1 0.0 11359 11359 

Format 

Type 

Length

Variable Name 

$75 

Char 

75

ViolDescription 

Definition: Describes each violation and corresponds to the ACD Code. 

N 

Prcnt 

Code 

Label
646 13.7 * 

33 0.7 * "EXCEED/VIOLATING SIZE, WEIGHT,/PASSENGER//CARGO 

1 0.0 * "FT OBEY RAILROAD GATES,SIGNS/SIGNALS" 

2 0.0 * "IMPR LANE/LOCATION -ROAD SHOULDER, 

42 0.9 * "MISSING,DEFACED,/OBSCURED LIC PLATES" 

1 0.0 * "MV IN MANUFACTUR,DISTRIBUTE,/DISPENSE A 

2 0.0 * "RECKLESS, CARELESS,/NEGLIGENT DRIVE" 

21 0.4 * "SHOW/USE IMPROPERLY-REG,PLATES,DECAL/STICKER" 

21 0.4 * "SPILLING, DRAGGING, UNSECURED/UNSAFE LOAD" 

15 0.3 * "STOP,STAND,/PARK WHERE PROHIBITED/IMPROPER" 

LTCCS Codebook DMVViolation Data Set  64 


Codebook - DMVViolation Data Set 

N 

Prcnt 

Code 

Label 
------------------------------

1 0.0 * TOWING/PUSHING VEH IMPROPERLY 
1 0.0 * TRANSPORTING LIQUOR ILLEGALLY 
1 0.0 * UNAUTH USE OF A VEH/TAKE VEH W/O OWNER CONSENT 
51 1.1 * UNSAFE CONDITION OF VEH 
96 2.0 * UNSAFE OPERATION 
10 0.2 * USE OF EQUIP PROHIBITED BY LAW 
3 0.1 * USE OF RADAR/LASER DETECTOR PROHIBITED BY LAW 
1 0.0 * VEH HOMICIDE 
6 0.1 * VIOLATE RESTRICTIONS OF DRIVER LIC 
10 0.2 * WITHDRAWAL (REASON NOT SPECIFIED) 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

LTCCS Codebook DMVViolation Data Set  65 


Codebook - DriverAssessment Data Set 

DriverAssessment Data Set 

The DriverAssessment data set contains assessment information on the driver regarding level of 
attention, behavior, mental or emotional state prior to the crash. One record of this information exists 
for each vehicle/driver. 

The DriverAssessment data set contains the variables CaseID, PSU, PSUStrat, RATWeight, and 
VehicleNumber. CaseID and VehicleNumber uniquely identify each record in this data set and 
should be used to merge the DriverAssessment data set with other vehicle level data sets. 

Format 

Type 

Length

Variable Name 

ML867F 

Numeric 

8

SightLine 

Definition: Establishes the drivers sight line to the other vehicle in terms of being clear or being 
obstructed in some manner.

N 

Prcnt 

Code 

Label 
1,957 85.7 1 Yes 

12 0.5 2 No, view obstructed by roadway curvature or grade 
5 0.2 3 No, view obstructed by roadside appurtenance 
42 1.8 4 No, view obstructed by intervening vehicle
225 9.9 7 Not applicable
23 1.0 8 Other (specify) 
20 0.9 9 Unknown 
Format 

Type 

Length

Variable Name 

ML730F 

Numeric 

8

Obscured 

Definition: Establishes the drivers view of the other vehicle in terms of having a clear view or having 
a view that is obscured in some manner. 

N 

Prcnt 

Code 

Label 

5 0.2 1 Yes, obscured by solar glare 
1 0.0 2 Yes, obscured by headlight glare 
20 0.9 4 Yes, obscured by dark (nighttime) viewing conditions 
1,960 85.8 5 No 
222 9.7 7 Not applicable 

50 2.2 8 Yes, obscured by other condition (specify) 
26 1.1 9 Unknown 
LTCCS Codebook DriverAssessment Data Set  66 


Codebook - DriverAssessment Data Set 

Format 

Type 

LengthVariable Name 

ML748F 

Numeric 

8 
Definition: Establishes if this driver is required to stop prior to entering an intersection, initiating a 

StopRequired 

turn, or prior to the crash. 
N Prcnt Code Label 
247 10.8 1 Yes, traffic control device (TCD) 
203 8.9 2 Yes, other reason (specify) 
76 3.3 3 Yes, yield right of way requirement 
1,726 75.6 5 No 
24 1.1 7 No driver present 
8 0.4 9 Unknown 

Format 

Type 

Length

Variable Name 

ML749F 

Numeric 

8

TimeStopped 

Definition: Establishes the period of time the driver was stopped prior to entering an intersection, 
initiating a turn, or prior to the crash. 

N 

Prcnt 

Code 

Label
105 4.6 0 Traveling at constant velocity
130 5.7 1 Decelerated, did not stop

9 0.4 2 Rolling stop prior to proceeding 
8 0.4 3 Stopped < 1 second prior to proceeding 
13 0.6 4 Stopped 1-2 seconds prior to proceeding 
18 0.8 5 Stopped 3-5 seconds prior to proceeding
132 5.8 6 Stopped more then 5 seconds prior to proceeding
24 1.1 7 No driver present 
1,734 75.9 8 Not required to stop 
111 4.9 9 Unknown 

Format 

Type 

Length

Variable Name 

ML729F 

Numeric 

8

Focused 

Definition: Documents the circumstance where the driver focuses on an extraneous location after 
initially checking for approaching traffic. 

N 

Prcnt 

Code 

Label 

176 7.7 1 Yes (specify) 

616 27.0 2 No 
1,124 49.2 7 Not applicable 

368 16.1 9 Unknown 

LTCCS Codebook DriverAssessment Data Set  67 


Codebook - DriverAssessment Data Set 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

ADRWorkSchedule 

Definition: Establishes whether or not the drivers sleep pattern is primarily related to his/her work 
schedule. (This variable was originally an attribute choice under the variable Drivers Hours of Main 

Sleep Related To.) 
N Prcnt Code Label 
838 36.7 0 Absent 
1,446 63.3 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

SocialSchedule 

Definition: Establishes whether or not the drivers sleep pattern is related to a social schedule. (This 
variable was originally an attribute choice under the variable Drivers Hours Of Main Sleep Related 

To.) 
N Prcnt Code Label 
2,137 93.6 0 Absent 
147 6.4 1 Present 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

PersonalProblems 

Definition: Establishes whether or not the drivers sleep pattern is primarily related to a set of 
personal problems. (This variable was originally an attribute choice under the variable Drivers 
Hours Of Main Sleep Related To.) 

N Prcnt Code Label 
2,281 99.9 0 Absent 
3 0.1 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

FamilyProblems 

Definition: Establishes whether or not the drivers sleep pattern is related to problems of other 
family members or to interpersonal relationships between the driver and other family members. (This 
variable was originally an attribute choice under the variable Drivers Hours Of Main Sleep Related 

To.) 
N Prcnt Code Label 
2,278 99.7 0 Absent 
6 0.3 1 Present 

LTCCS Codebook DriverAssessment Data Set  68 


Codebook - DriverAssessment Data Set 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

Illness 

Definition: Establishes whether or not the drivers sleep pattern is related to illness. The illness may 
involve either the driver or other family members. (This variable was originally an attribute choice 
under the variable Drivers Hours Of Main Sleep Related To.) 

N Prcnt Code Label 
2,273 99.5 0 Absent 
11 0.5 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

NoDriverPresent 

Definition: Establishes whether or not there was a driver present in the drivers seated position at 
the time of the crash. (This variable was originally an attribute choice under the variable Drivers 
Hours Of Main Sleep Related To.) 

N Prcnt Code Label 
2,259 98.9 0 Absent 
25 1.1 1 Present 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

ADROtherFactor 

Definition: Establishes whether or not the drivers sleep pattern is related to a factor not described 
by the other sleep pattern variables. (This variable was originally an attribute choice under the 
variable Drivers Hours Of Main Sleep Related To and was the Other (specify): attribute choice.) 

N Prcnt Code Label 
2,234 97.8 0 Absent 
50 2.2 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

UnknownFactor 

Definition: Establishes whether or not the drivers sleep pattern was related to an unknown factor. 
(This variable was originally an attribute choice under the variable Drivers Hours Of Main Sleep 
Related To and was the Unknown attribute choice.) 

N Prcnt Code Label 
1,655 72.5 0 Absent 
629 27.5 1 Present 

LTCCS Codebook DriverAssessment Data Set  69 


Codebook - DriverAssessment Data Set 

Format 

Type 

Length

Variable Name 

ML869F 

Numeric 

8

AlcoholUse 

Definition: Establishes the presence of alcohol for this driver.
N 

Prcnt 

Code 

Label 
2,040 89.3 0 No alcohol use 

63 2.8 91 AC test performed, results positive 

22 1.0 92 Field observation of NASS researcher 

16 0.7 93 AC test performed, results negative 

10 0.4 96 None given 

82 3.6 97 AC test performed, results unknown 

24 1.1 98 No driver present 

27 1.2 99 Unknown 

Format 

Type 

Length

Variable Name 

OT64F 

Numeric 

8

AlcoholTest 

Definition: Records the results of an alcohol test (either blood alcohol test or Breathalyzer test) in 
percent times 100. 

N 

Prcnt 

Code 

Label
464 20.3 0 0 

1 0.0 1 1 

1 0.0 3 3 

1 0.0 10 10 

1 0.0 15 15 

1 0.0 16 16 

1 0.0 40 40 

1 0.0 60 60 

1 0.0 68 68 

1 0.0 70 70 

2 0.1 76 76 

1 0.0 79 79 

1 0.0 80 80 

2 0.1 100 100 

1 0.0 107 107 

2 0.1 110 110 

1 0.0 118 118 

3 0.1 120 120 

1 0.0 129 129 

2 0.1 130 130 

1 0.0 140 140 

2 0.1 150 150 

1 0.0 160 160 

LTCCS Codebook DriverAssessment Data Set  70 


Codebook - DriverAssessment Data Set 

N 

Prcnt 

Code 

Label 

3 0.1 170 170 

1 0.0 180 180 

1 0.0 190 190 

1 0.0 193 193 

1 0.0 198 198 

1 0.0 200 200 

4 0.2 210 210 

3 0.1 220 220 

1 0.0 221 221 

1 0.0 223 223 

1 0.0 228 228 

3 0.1 230 230 

1 0.0 240 240 

1 0.0 252 252 

1 0.0 254 254 

1 0.0 264 264 

1 0.0 280 280 

1 0.0 290 290 

1 0.0 292 292 

2 0.1 320 320 

1 0.0 321 321 

1 0.0 350 350 

1 0.0 362 362 

1 0.0 369 369 

24 1.1 8887 No driver present 
1,593 69.7 9998 None 
140 6.1 9999 Unknown 

Variable Name 

Format 

Type 

Length 

ML3451F 

Numeric 

8

TestSource 

Definition: Documents the source of the BAC test results. 
N 

Prcnt 

Code 

Label 
1,559 68.3 0 No BAC test/Not applicable 
215 9.4 1 Police reported 

84 3.7 2 Company reported 

24 1.1 6 No driver present
377 16.5 8 Other (specify)

25 1.1 9 Unknown 

LTCCS Codebook DriverAssessment Data Set  71 


Codebook - DriverAssessment Data Set 

Format 

Type 

Length

Variable Name 

$OT65F 

Char 

5

TestDelay

Definition: Documents the time delay between the crash and the time the BAC test is administered. 
N 

Prcnt 

Code 

Label 

9 0.4 * 00:00 
1 0.0 * 00:25 
1 0.0 * 00:28 
1 0.0 * 00:29 
2 0.1 * 00:30 
1 0.0 * 00:31 
1 0.0 * 00:33 
2 0.1 * 00:36 
1 0.0 * 00:37 
1 0.0 * 00:39 
------------------------------
1 0.0 * 39:14 
1 0.0 * 47:10 
1 0.0 * 55:00 
1 0.0 * 58:48 
1 0.0 * 68:12 
1 0.0 * 68:30 
1 0.0 * 70:30 
24 1.1 97:97 No driver present 
1,632 71.5 98:98 No BAC Test
325 14.2 99:99 Unknown 

Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Format 

Type 

Length

Variable Name 

ML870F 

Numeric 

8

ADRDrugTest 

Definition: Documents the administration of a drug test for this driver. 
N 

Prcnt 

Code 

Label
575 25.2 0 No drug use
267 11.7 5 Test performed, results negative

86 3.8 91 Test performed, results positive 
1,207 52.8 96 None given 
81 3.5 97 Test performed, results unknown 
24 1.1 98 No driver present 
44 1.9 99 Unknown 
LTCCS Codebook DriverAssessment Data Set  72 


Codebook - DriverAssessment Data Set 

Format 

Type 

Length

Variable Name 

ML662F 

Numeric 

8

Fatigue 

Definition: Assesses driver fatigue at the time of the crash. The assessment is based on an 
evaluation of the drivers current and preceding sleep schedules, current and preceding work 
schedules, and a variety of other fatigue-related factors including recreational and non-work 
activities.

N 

Prcnt 

Code 

Label 
1,374 60.2 0 Driver not fatigued 
216 9.5 1 Driver fatigued 

24 1.1 8 No driver present
670 29.3 9 Unknown if driver fatigued 
Variable Name 

Format 

Type 

Length 

ML752F 

Numeric 

8

Upset 

Definition: Establishes whether or not the driver was upset prior to the crash and the specific reason 
for this emotional state. 

N 

Prcnt 

Code 

Label 
1,543 67.6 0 Not upset 

8 0.4 1 Preceding argument with spouse 
4 0.2 2 Preceding argument with other family member 
12 0.5 3 Preceding argument with other individual (specify) 
7 0.3 4 Related to financial problems 
9 0.4 5 Related to family problems 
24 1.1 7 No driver present 
17 0.7 8 Other source (specify)
660 28.9 9 Unknown 
Variable Name 

Format 

Type 

Length 

ML732F 

Numeric 

8

Hurrying 

Definition: Establishes if the driver was in a hurry prior to crash occurrence. Assessments of this 
type are reflected in the drivers precrash driving behavior (e.g. speeding, sudden starts/stops, 
weaving in and out of traffic, etc.) 

N 

Prcnt 

Code 

Label 
1,523 66.7 0 Not in a hurry 

21 0.9 1 Due to work-related schedule 
4 0.2 2 Late for business appointment 
5 0.2 3 Late for social appointment 
13 0.6 4 Late for start of work shift/start of school classes 
3 0.1 5 Normal driving pattern 
24 1.1 7 No driver present 
LTCCS Codebook DriverAssessment Data Set  73 


Codebook - DriverAssessment Data Set 

N Prcnt Code Label 
24 1.1 8 Other reason (specify) 
667 29.2 9 Unknown 
Variable Name Format Type Length 
Emotional ML865F Numeric 8 

Definition: Establishes if there were other emotional factors relevant to this drivers precrash 
behavior. 

N 

Prcnt 

Code 

Label 
1,556 68.1 0 No other emotional factors 

18 0.8 1 Driver clinically depressed 
9 0.4 2 Driver has a diagnosed psychosis (specify) 
24 1.1 7 No driver present 
23 1.0 8 Other factors (specify)
654 28.6 9 Unknown 
Variable Name 

Format 

Type 

Length 

ML753F 

Numeric 

8

KnewVehicle 

Definition: Establishes driver familiarity with the vehicle being operated at the time of the crash. 
N 

Prcnt 

Code 

Label 

50 2.2 1 First time driving this vehicle 
62 2.7 2 Had driven this vehicle 2-5 times in the past six months 
40 1.8 3 Had driven this vehicle 6-10 times in the past six months 
1,387 60.7 4 Had driven this vehicle more than 10 times in the past six months 
24 1.1 7 No driver present
721 31.6 9 Unknown 
Variable Name 

Format 

Type 

Length 

ML747F 

Numeric 

8

KnewRoad 

Definition: Establishes the drivers familiarity with the approach to the crash site. 
N 

Prcnt 

Code 

Label
111 4.9 1 First time driving on this roadway
196 8.6 2 Rarely drives on this roadway
151 6.6 3 Drives on this roadway once per month
105 4.6 4 Drives on this roadway several times per month 
421 18.4 5 Drives on this roadway weekly
632 27.7 6 Drives on this roadway daily

24 1.1 7 No driver present 
LTCCS Codebook DriverAssessment Data Set  74 


Codebook - DriverAssessment Data Set 

N Prcnt Code Label 
57 2.5 8 Other frequency (specify) 
587 25.7 9 Unknown 
Variable Name Format Type Length 
WorkPressureCount AP3U Numeric 8 

Definition: A count of the number of work pressure variables. This includes attributes from the 
original variable Driver Under Work-Related Pressure, which were broken out into individual 
variables. 

N 

Prcnt 

Code 

Label 
1,512 66.2 0 0 
104 4.6 1 1 

14 0.6 2 2 
24 1.1 7 7 
630 27.6 99 Unknown 
Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

NewPosition 

Definition: Establishes whether or not the driver was under pressure from his/her employer as a 
result of learning a new position in his/her primary work place. (This variable was originally an 
attribute choice under the variable Driver Under Work-Related Pressure.) 

N Prcnt Code Label 
2,266 99.2 0 Absent 
18 0.8 1 Present 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

ShippingDeadline 

Definition: Establishes whether or not the driver experienced work pressure as a result of being 
under time-related pressures associated with production/shipping deadlines. (This variable was 
originally an attribute under the variable Driver Under Work-Related Pressure.) 

N Prcnt Code Label 
2,280 99.8 0 Absent 
4 0.2 1 Present 

LTCCS Codebook DriverAssessment Data Set  75 


Codebook - DriverAssessment Data Set 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

EXPWorkSchedule 

Definition: Establishes whether or not the driver was experiencing any pressure on the job as it 
relates to his/her work schedule. (This variable was originally an attribute choice under the variable 
Driver Under Work-Related Pressure.) 

N Prcnt Code Label 
2,257 98.8 0 Absent 
27 1.2 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

Quotas 

Definition: Establishes whether or not the driver experienced any work pressure with regard to 
additional production or sales requirements. (This variable was originally an attribute choice under 
the variable Driver Under Work-Related Pressure.) 

N Prcnt Code Label 
2,283 100.0 0 Absent 
1 0.0 1 Present 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

ExtraLoads 

Definition: Establishes whether or not the driver was under pressure from his/her employer to 
accept loads with little or no advance notice. (This variable was originally an attribute choice under 
the variable Driver Under Work-Related Pressure.) 

N Prcnt Code Label 
2,275 99.6 0 Absent 
9 0.4 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

Demoted 

Definition: Establishes whether or not the driver had recently been forced to accept a demotion 
and/or pay decrease. (This variable was originally an attribute choice under the variable Driver 
Under Work-Related Pressure.) 

N Prcnt Code Label 
2,283 100.0 0 Absent 
1 0.0 1 Present 

LTCCS Codebook DriverAssessment Data Set  76 


Codebook - DriverAssessment Data Set 

Format 

Type 

LengthVariable Name 

AP1U 

Numeric 

8

SelfInducedIllegal 

Definition: Establishes whether or not the driver experienced self-induced work pressure, as 
opposed to employer-induced pressure. The driver was pressuring himself to do things that are 
considered illegal (e.g. a truck driver continuing to drive even though he knows he is over his allowed 
driving hours). (This variable was originally an attribute choice under the variable Work-Related 
Pressure in the electronic data system, but was not found on the paper version of the Crash Event 

Assessment Form.) 
N Prcnt Code Label 
2,272 99.5 0 Absent 
12 0.5 1 Present 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

SelfInducedOther 

Definition: Establishes whether or not the driver experienced self-induced work pressure, as 
opposed to employer-induced pressure. (This variable was originally an attribute choice under the 
variable Work-Related Pressure in the electronic data system, but was not found on the paper 
version of the Crash Event Assessment Form.) 

N Prcnt Code Label 
2,246 98.3 0 Absent 
38 1.7 1 Present 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

OtherPressure 

Definition: Establishes whether or not the driver experienced any work-related pressure that was 
not captured under other work-pressure variables. (This variable was originally an attribute choice 
under the variable Driver Under Work-Related Pressure and was the Other (specify) attribute 

choice). 
N Prcnt Code Label 
2,262 99.0 0 Absent 
22 1.0 1 Present 

Variable Name 

Format 

Type 

Length 

AP2U 

Numeric 

8

ComfortCount 

Definition: Establishes the total number of attributes coded for the variable Other Factor Types, 
which had to do with a drivers comfort with traffic conditions and the vehicle. 

N Prcnt Code Label 
1,558 68.2 0 0 
69 3.0 1 1 
3 0.1 2 2 

LTCCS Codebook DriverAssessment Data Set  77 


Codebook - DriverAssessment Data Set 

N Prcnt Code Label 
24 1.1 7 No Driver Present 
630 27.6 9 Unknown 
Variable Name Format Type Length 
TrafficDensity AP1U Numeric 8 

Definition: Establishes whether or not the driver was uncomfortable with the surrounding traffic 
densities. The densities are usually very high as might be associated with rush hour traffic. (This 
variable was originally an attribute choice under the variable Other Factor Types, which had to do 

with driver experience.) 
N Prcnt Code Label 
2,279 99.8 0 Absent 
5 0.2 1 Present 

Format 

Type 

LengthVariable Name 

AP1U 

Numeric 

8

TrafficSpeed 

Definition: Establishes whether or not the driver was uncomfortable with the general speed of 
surrounding traffic. The discomfort is typically associated with the driver feeling that surrounding 
traffic is moving too fast. (This variable was originally an attribute choice under the variable Other 
Factor Types, which had to do with driver experience.) 

N 

Prcnt 

Code 

Label 
2,283 100.0 0 Absent 

1 0.0 1 Present 
Format 

Type LengthVariable Name 

AP1U 

Numeric 

8

ADRTrafficFlow

Definition: Establishes whether or not the driver was uncomfortable with the general flow of 
surrounding traffic. (This variable was originally an attribute choice under the variable Other Factor 
Types, which had to do with driver experience.) 

N Prcnt Code Label 
2,283 100.0 0 Absent 
1 0.0 1 Present 

LTCCS Codebook DriverAssessment Data Set  78 


Codebook - DriverAssessment Data Set 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

VehicleLoad 

Definition: Establishes whether or not the driver was uncomfortable with either the vehicle or the 
load. (This variable was originally an attribute choice under the variable Other Factor Types, which 
had to do with driver experience.) 

N Prcnt Code Label 
2,247 98.4 0 Absent 
37 1.6 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

OtherComfortFactor 

Definition: Establishes whether or not the driver had an other experience/exposure factor that was 
relevant to the crash that was not described by the other comfort variables. (This variable was 
originally an attribute choice under the variable Other Factor Types, was was the Other (specify) 

attribute choice.) 
N Prcnt Code Label 
2,253 98.6 0 Absent 
31 1.4 1 Present 

Variable Name 

Format 

Type 

Length 

ML736F 

Numeric 

8

LoadPressure 

Definition: Documents the circumstance where the driver is under some pressure from the carrier to 
accept additional loads. 

N 

Prcnt 

Code 

Label 
1,007 44.1 0 Not under pressure to accept loads 

1 0.0 1 Accept unscheduled loads on scheduled trip 
2 0.1 2 Accept additional loads on unscheduled trip 
2 0.1 3 Accept unscheduled loads on short notice scheduled trip 
12 0.5 4 Accept additional loads when over allowable driving hours 
1,018 44.6 7 Not applicable 
23 1.0 8 Other load factors (specify)
219 9.6 9 Unknown 
LTCCS Codebook DriverAssessment Data Set  79 


Codebook - DriverAssessment Data Set 

Format 

Type 

Length

Variable Name 

AP4U 

Numeric 

8

WorkFatigueCount 

Definition: A count of the number of work fatigue-related variables. This includes attributes from the 
original variable Under Pressure to Operate Even if Fatigued, which were broken out into individual 
variables. 

N 

Prcnt 

Code 

Label 
1,016 44.5 0 0 

35 1.5 1 1 
2 0.1 2 2 
1,007 44.1 7 Not applicable 
224 9.8 9 Unknown 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

ScheduledExtensions 

Definition: Establishes whether or not the driver experienced work pressure due to his/her carrier 
scheduling trips in a manner that requires extended work shifts to complete. (This variable was 
originally an attribute under the variable Under Pressure to Operate Even if Fatigued.) 

N Prcnt Code Label 
2,272 99.5 0 Absent 
12 0.5 1 Present 

Format 

Type 

LengthVariable Name 

AP1U 

Numeric 

8

RotatingShift 

Definition: Establishes whether or not the driver experienced work pressure due to his/her carrier 
scheduling trips in a manner that requires the driver to work rotating shift schedules with an 
associated rotating sleep pattern. (This variable was originally an attribute choice under the variable 
Under Pressure to Operate Even if Fatigued.) 

N 

Prcnt 

Code 

Label 
2,281 99.9 0 Absent 

3 0.1 1 Present 
LTCCS Codebook DriverAssessment Data Set  80 


Codebook - DriverAssessment Data Set 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

UnscheduledExtensions 

Definition: Establishes whether or not the driver experienced work pressure due to his/her carrier 
pressing the driver to accept unscheduled loads/trips that require the driver to operate while fatigued. 
(This variable was originally an attribute under the variable Under Pressure to Operate Even if 

Fatigued.) 
N Prcnt Code Label 
2,277 99.7 0 Absent 
7 0.3 1 Present 

Format 

Type 

LengthVariable Name 

AP1U 

Numeric 

8

NoApplicableFatigue 

Definition: Originally an attribute choice under the variable Under Pressure to Operate Even if 
Fatigued (a carrier-related variable). 

N 

Prcnt 

Code 

Label 
1,277 55.9 0 Absent 
1,007 44.1 1 Present 

Format 

Type 

LengthVariable Name 

AP1U 

Numeric 

8

OtherFatigue 

Definition: Establishes whether or not the driver experienced any pressure by the carrier to operate 
even if fatigued when that pressure did not fit under other fatigue variables. (This variable was 
originally an attribute choice under the variable Under Pressure to Operate Even If Fatigued and 
was the Other (specify) attribute choice.) 

N Prcnt Code Label 
2,267 99.3 0 Absent 
17 0.7 1 Present 

Format 

Type 

Length

Variable Name 

AP4U 

Numeric 

8

OtherPressureCount 

Definition: Establishes the number of other pressures specified in the Other Work Pressure 
variable. 

N 

Prcnt 

Code 

Label 
1,004 44.0 0 0 

47 2.1 1 1 
5 0.2 2 2 
1,009 44.2 7 Not applicable 
219 9.6 9 Unknown 

LTCCS Codebook DriverAssessment Data Set  81 


Codebook - DriverAssessment Data Set 

Format 

Type 

LengthVariable Name 

AP1U 

Numeric 

8 

Definition: Establishes whether or not the driver was required by his/her carrier to accept short 
notice trips. (This variable was originally an attribute choice under variable Other Relation Factor 

ShortNoticeTrips 

Types.) 
N Prcnt Code Label 
2,268 99.3 0 Absent 
16 0.7 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

FillInTrips 

Definition: Establishes whether or not the driver was under pressure by his/her carrier to fill in for 
other drivers (i.e. perform extra work) when other drivers are absent. 

N Prcnt Code Label 
2,278 99.7 0 Absent 
6 0.3 1 Present 

Format 

Type 

LengthVariable Name 

AP1U 

Numeric 

8

UnpaidLoading 

Definition: Establishes whether or not the driver was required by his/her carrier to complete 
uncompensated loading/unloading activities. (This variable was originally an attribute choice under 
variable Other Relation Factor Types.) 

N 

Prcnt 

Code 

Label 
2,274 99.6 0 Absent 

10 0.4 1 Present 
Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

VariableCompensation 

Definition: Establishes whether or not the driver is compensated in accordance with a variable 
compensation package such that the driver is not paid on a consistent basis. (This variable was 
originally an attribute choice under variable Other Relation Factor Types.) 

N 

Prcnt 

Code 

Label 
2,284 100.0 0 Absent 

LTCCS Codebook DriverAssessment Data Set  82 


Codebook - DriverAssessment Data Set 

Format 

Type 

LengthVariable Name 

AP1U 

Numeric 

8 
Definition: Originally an attribute choice under the variable Other Relation Factor Types (a 

NoApplicableRelations 

carrier-related variable). 
N Prcnt Code Label 
1,275 55.8 0 Absent 
1,009 44.2 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

OtherRelations 

Definition: Establishes whether or not there were other carrier relation factors not captured in other 
carrier relation variables that may have had a bearing on crash occurrence. (This variable was 
originally an attribute choice under the variable Other Relation Factor Types, and was the Other 
(specify) attribute choice). 

N Prcnt Code Label 
2,259 98.9 0 Absent 
25 1.1 1 Present 

LTCCS Codebook DriverAssessment Data Set  83 


Codebook - DriverDecisionAggression Data Set 

DriverDecisionAggression Data Set 

The DriverDecisionAggression data set contains a variety of data supporting the analysts 
assessment. It focuses particularly on the drivers decisions and aggressive behavior. One record of 
this information exists for each vehicle/driver. 

The DriverDecisionAggression data set contains the variables CaseID, PSU, PSUStrat, RATWeight, 
and VehicleNumber. CaseID and VehicleNumber uniquely identify each record in this data set and 
should be used to merge the DriverDecisionAggression data set with other vehicle level data sets. 

Format 

Type 

Length

Variable Name 

ML727F 

Numeric 

8

Speeding 

Definition: Documents reasons given by the driver for traveling at his/her pre-crash travel speed. 
This variable is only relevant in the circumstance where the driver had been assessed as traveling 
too fast for conditions. 

N 

Prcnt 

Code 

Label
1,726 75.6 0 No traveling too fast factors

19 0.8 1 Keeping up with traffic
131 5.7 2 Did not realize caution required
194 8.5 3 Other reason (specify)
24 1.1 7 No driver present
190 8.3 9 Unknown 
Format 

Type 

Length

Variable Name 

ML720F 

Numeric 

8

Tailgating 

Definition: Documents reasons given by the driver for traveling with less than the recommended 
gap interval to traffic forward of the drivers position. 

N 

Prcnt 

Code 

Label 
2,080 91.1 0 No following too closely factors 

17 0.7 1 Rush hour, heavy traffic 
12 0.5 2 Keeping up with traffic 
29 1.3 3 Did not realize too close 
5 0.2 4 Always drive at this gap distance 
24 1.1 7 No driver present 
22 1.0 8 Other (specify) 
95 4.2 9 Unknown 
LTCCS Codebook DriverDecisionAggression Data Set  84 


Codebook - DriverDecisionAggression Data Set 

Format 

Type 

Length

Variable Name 

ML863F 

Numeric 

8

Misjudgment 

Definition: Documents the involvement of a decision error in which the subject driver either 
misjudges the gap distance to the other vehicle or misjudges the velocity of the other vehicle. 

N 

Prcnt 

Code 

Label
2,061 90.2 0 No misjudgment factors

18 0.8 1 Misjudgment of gap distance 
33 1.4 2 Misjudgment of velocity of other vehicle 
25 1.1 3 Misjudgment of both factors 
24 1.1 7 No driver present
123 5.4 9 Unknown 
Format 

Type 

Length

Variable Name 

ML864F 

Numeric 

8

Approach 

Definition: Establishes the direction from which the misjudged vehicle was approaching this drivers 
position. 

N 

Prcnt 

Code 

Label 
2,060 90.2 0 No misjudgment factors 

9 0.4 1 Left 
5 0.2 2 Right 
67 2.9 3 Forward direction (i.e. 170-190 degrees opposed) 
2 0.1 4 Left forward direction (i.e. 120-169 degrees opposed) 
3 0.1 5 Right forward direction (i.e. 191-240 degrees opposed) 
15 0.7 6 Rear 
24 1.1 7 No driver present 
99 4.3 9 Unknown 
Format 

Type 

Length

Variable Name 

OT14F 

Numeric 

8

ADATravelSpeed 

Definition: Documents the travel speed of this driver as reported on the police report (kph). 

N 

Prcnt 

Code 

Label
220 9.6 0 0 

1 0.0 5 5 
15 0.7 8 8 
4 0.2 11 11 
2 0.1 13 13 
27 1.2 16 16 
1 0.0 19 19 
1 0.0 20 20 
LTCCS Codebook DriverDecisionAggression Data Set  85 


Codebook - DriverDecisionAggression Data Set 

N 

Prcnt 

Code 

Label 

1 0.0 22 22 

1 0.0 23 23 
------------------------------

1 0.0 126 126 

5 0.2 129 129 

1 0.0 137 137 

1 0.0 145 145 

1 0.0 153 153 

1 0.0 156 156 

1 0.0 161 161 

1 0.0 177 177 

1 0.0 241 241
1,406 61.6 9999 Unknown 

Variable Name 

Format 

Type 

Length 

OT14F 

Numeric 

8

ADAPostedSpeed 

Definition: Establishes the pre-crash roadways posted speed limit (kph). 
N 

Prcnt 

Code 

Label 

6 0.3 0 0 

1 0.0 16 16 

4 0.2 24 24 

4 0.2 32 32 

44 1.9 40 40 

58 2.5 48 48
174 7.6 56 56
135 5.9 64 64
278 12.2 72 72
163 7.1 80 80
694 30.4 89 89
236 10.3 97 97
344 15.1 105 105

99 4.3 113 113 

31 1.4 121 121 

13 0.6 9999 Unknown 

LTCCS Codebook DriverDecisionAggression Data Set  86 


Codebook - DriverDecisionAggression Data Set 

Format 

Type 

Length

Variable Name 

ML724F 

Numeric 

8

Assumption 

Definition: Identifies false assumptions on the part of this driver with respect to other drivers actions 
or intended actions. 

N 

Prcnt 

Code 

Label
1,959 85.8 0 No false assumption factors

1 0.0 1 Assumed that other driver would merge without stopping 
2 0.1 2 Assumed that other driver would turn without stopping 
24 1.1 3 Assumed that other driver would continue to proceed 
37 1.6 4 Assumed that other driver would yield right-of-way 
24 1.1 7 No driver present 
19 0.8 8 Other false assumption (specify)
218 9.5 9 Unknown 
Format 

Type 

Length

Variable Name 

ML723F 

Numeric 

8

Evasion 

Definition: Establishes inadequate evasive actions on the part of this driver. This variable does not 
deal with legal requirements and the final assessment may be subjective. 

N 

Prcnt 

Code 

Label 
2,044 89.5 0 No inadequate evasive action factors 

26 1.1 1 Insufficient steering inputs 
23 1.0 2 Insufficient braking inputs 
40 1.8 3 Combination of insufficient steering and braking inputs 
24 1.1 4 No driver present 
33 1.4 8 Other inadequate evasive action (specify) 
94 4.1 9 Unknown 
Format 

Type 

Length

Variable Name 

ML739F 

Numeric 

8

ADAOtherFactor 

Definition: Establishes decision factors relevant to this crash that are not described in the other 
decision variables. 

N 

Prcnt 

Code 

Label 
1,923 84.2 0 No other decision factors 

3 0.1 1 Crossed with obstructed view 
3 0.1 2 Turned with obstructed view 
4 0.2 3 Stopped when not required 
25 1.1 4 Proceeded with insufficient clearance 
2 0.1 5 Turned without signaling 
24 1.1 7 No driver present 
LTCCS Codebook DriverDecisionAggression Data Set  87 


Codebook - DriverDecisionAggression Data Set 

N 

Prcnt 

Code 

Label
112 4.9 8 Other decision error (specify)
188 8.2 9 Unknown 

Variable Name 

Format 

Type 

Length 

AP2U 

Numeric 

8

ManeuverCount 

Definition: Establishes the total number of illegal maneuvers conducted by this driver.
N 

Prcnt 

Code 

Label 
2,014 88.2 0 0 
188 8.2 1 1 

4 0.2 2 2 
23 1.0 7 No Driver Present 
55 2.4 9 Unknown 
Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

CrossedLine 

Definition: Documents whether or not the driver crosses full barrier lines to execute, or while 
executing, a passing maneuver. (This variable was originally an attribute choice under the variable 

Illegal Maneuver.) 
N Prcnt Code Label 
2,279 99.8 0 Absent 
5 0.2 1 Present 

Format 

Type 

LengthVariable Name 

AP1U 

Numeric 

8

Undertaking 

Definition: Documents whether or not the driver drives off the travel lane(s) to pass on the right (i.e. 
driver moves on to shoulder area to execute the passing maneuver). (This variable was originally an 
attribute choice under the variable Illegal Maneuver.) 

N 

Prcnt 

Code 

Label 
2,280 99.8 0 Absent 

4 0.2 1 Present 
LTCCS Codebook DriverDecisionAggression Data Set  88 


Codebook - DriverDecisionAggression Data Set 

Format 

Type 

LengthVariable Name 

AP1U 

Numeric 

8

WrongTurnLane 

Definition: Documents whether or not the driver executes a turn from the wrong lane (i.e. driver 
turns left from the right lane or turns right from the left lane of a multi-lane roadway). (This variable 
was originally an attribute choice under the variable Illegal Maneuver.) 

N Prcnt Code Label 
2,274 99.6 0 Absent 
10 0.4 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

IllegalUTurn 

Definition: Documents whether or not the driver initiates a U-turn in an area where these turns are 
not permitted. (This variable was originally an attribute choice under the variable Illegal Maneuver.) 

N Prcnt Code Label 
2,279 99.8 0 Absent 
5 0.2 1 Present 

Format 

Type 

LengthVariable Name 

AP1U 

Numeric 

8

RanLights 

Definition: Documents whether or not the driver does not stop for a displayed red traffic signal 
phase or does not stop for a stop sign. (This variable was originally an attribute choice under the 
variable Illegal Maneuver.) 

N 

Prcnt 

Code 

Label 
2,202 96.4 0 Absent 

82 3.6 1 Present 
Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

WrongWay

Definition: Documents whether or not the driver travels the wrong way on a one-way roadway. (This 
variable was originally an attribute choice under the variable Illegal Maneuver.) 

N Prcnt Code Label 
2,276 99.6 0 Absent 
8 0.4 1 Present 

LTCCS Codebook DriverDecisionAggression Data Set  89 


Codebook - DriverDecisionAggression Data Set 
Variable Name Format Type Length 
OtherManeuver AP1U Numeric 8 

Definition: Documents whether or not the driver initiates an illegal maneuver that is not described in 
the other illegal maneuver variables. (This variable was originally an attribute choice under the 
variable Illegal Maneuver and was the Other Illegal Maneuver (specify): attribute.) 

N Prcnt Code Label 
2,202 96.4 0 Absent 
82 3.6 1 Present 

Variable Name 

Format 

Type 

Length 

AP3U 

Numeric 

8

AggressionCount 

Definition: Establishes the total number of aggressive behaviors exhibited by this driver.
N 

Prcnt 

Code 

Label 
1,985 86.9 0 0 
119 5.2 1 1 

28 1.2 2 2 
1 0.0 3 3 
24 1.1 77 No Driver Present
127 5.6 99 Unknown 
Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

SpeedingBehavior 

Definition: Documents whether or not the driver exhibited aggressive behavior in terms of 
exceeding the speed limit by a minimum of 5 MPH (8.05 kmph) and the vehicles speed has a bearing 
on subsequent crash events. A degree of caution is required when assigning this element. 
Specifically, to be considered as a valid aggressive driving element, the act of speeding should pose 
some risk to surrounding traffic. If, for example, the driver is speeding in a stream of traffic, this act 
poses a risk to surrounding traffic. On the other hand, a driver who is speeding late at night, on a rural 
highway with no surrounding traffic, does not pose a risk to others and should not be considered as 
driving aggressively. (This variable was originally an attribute choice under the variable Aggressive 
Driving Behavior.) 

N Prcnt Code Label 
2,170 95.0 0 Absent 
114 5.0 1 Present 

LTCCS Codebook DriverDecisionAggression Data Set  90 


Codebook - DriverDecisionAggression Data Set 

Format 

Type 

LengthVariable Name 

AP1U 

Numeric 

8

TailgatingBehavior 

Definition: Documents whether or not the driver exhibited aggressive behavior in terms of traveling 
in close proximity to a vehicle forward of his/her position. While the exact gap interval that qualifies 
for this assignment will vary with the velocity of the traffic stream, the interval should be sufficiently 
small/short to preclude the following vehicle/driver from executing a safe stop in an emergency stop 
circumstance. (This variable was originally an attribute choice under the variable Aggressive Driving 

Behavior.) 
N Prcnt Code Label 
2,277 99.7 0 Absent 
7 0.3 1 Present 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

Weaving 

Definition: Documents whether or not the driver exhibited aggressive behavior in terms of weaving 
in and out of traffic to pass slower-moving vehicles. While drivers engaging in this activity typically 
exceed the speed limit, speeding is not required for valid use of this element. (This variable was 
originally an attribute choice under the variable Aggressive Driving Behavior.) 

N Prcnt Code Label 
2,263 99.1 0 Absent 
21 0.9 1 Present 

Format 

Type 

LengthVariable Name 

AP1U 

Numeric 

8

LightViolations 

Definition: Documents whether or not the driver exhibited aggressive behavior in terms of violating 
a displayed red signal phase or stop sign. Deliberate violation of a yield sign is captured under the 
Other Aggressive Behavior variable. (This variable was originally an attribute choice under the 
variable Aggressive Driving Behavior.) 

N 

Prcnt 

Code 

Label 
2,269 99.3 0 Absent 

15 0.7 1 Present 
LTCCS Codebook DriverDecisionAggression Data Set  91 


Codebook - DriverDecisionAggression Data Set 

Format 

Type 

LengthVariable Name 

AP1U 

Numeric 

8

RapidAcceleration 

Definition: Documents whether or not the driver exhibited aggressive behavior in terms of engaging 
in these activities in a repeating fashion (i.e. braking late for a TCD and then accelerating rapidly 
away from that location and repeating this behavior at the next TCD). This behavior pattern is often 
associated with being in a hurry or being late for some engagement. (This variable was originally an 
attribute choice under the variable Aggressive Driving Behavior.) 

N Prcnt Code Label 
2,279 99.8 0 Absent 
5 0.2 1 Present 

Format 

Type 

LengthVariable Name 

AP1U 

Numeric 

8

Honking 

Definition: Documents whether or not the driver exhibited aggressive behavior in terms of 
repeatedly honking the vehicles horn at surrounding traffic to gain a time/space advantage. (This 
variable was originally an attribute choice under the variable Aggressive Driving Behavior.) 

N 

Prcnt 

Code 

Label 
2,283 100.0 0 Absent 

1 0.0 1 Present 
Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

Flashing 

Definition: Documents whether or not the driver exhibited aggressive behavior in terms of 
repeatedly flashing the vehicles lights in an attempt to have traffic forward of this vehicles position 
move either to the right or left so that this vehicle can get by. (This variable was originally an 
attribute choice under the variable Aggressive Driving Behavior.) 

N Prcnt Code Label 
2,283 100.0 0 Absent 
1 0.0 1 Present 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

ObsceneGestures 

Definition: Documents whether or not the driver exhibited aggressive behavior in terms of making 
obscene gestures at other drivers. (This variable was originally an attribute choice under the variable 
Aggressive Driving Behavior.) 

N 

Prcnt 

Code 

Label 
2,284 100.0 0 Absent 

LTCCS Codebook DriverDecisionAggression Data Set  92 


Codebook - DriverDecisionAggression Data Set 

Format 

Type 

LengthVariable Name 

AP1U 

Numeric 

8

BlockingOthers 

Definition: Documents whether or not the driver exhibited aggressive behavior in terms of using 
his/her vehicle to physically obstruct the path of another vehicle by pulling in front of that vehicle. In 
addition to physically blocking the path, the subject driver typically slows to force the other driver to 
take evasive action (e.g. steering, and/or braking actions). (This variable was originally an attribute 
choice under the variable Aggressive Driving Behavior.) 

N Prcnt Code Label 
2,281 99.9 0 Absent 
3 0.1 1 Present 

Format 

Type 

LengthVariable Name 

AP1U 

Numeric 

8

OtherAggression 

Definition: Documents whether or not the driver exhibited aggressive behavior that is not described 
by the other aggressive driving behavior variables. (This variable was originally an attribute choice 
under the variable Aggressive Driving Behavior and was the Other (specify) attribute choice.) 

N 

Prcnt 

Code 

Label 
2,273 99.5 0 Absent 

11 0.5 1 Present 
Variable Name 

Format 

Type 

Length 

ML2477F 

Numeric 

8

AggressionReason 

Definition: Establishes the reason for the aggressive driving behaviors reported in the 
corresponding variables. 

N 

Prcnt 

Code 

Label 
1,985 86.9 0 No aggressive driving behaviors 

6 0.3 1 Anger 
2 0.1 2 Frustration 
10 0.4 3 Always drive this way 
24 1.1 77 No driver present 
19 0.8 88 Other (specify)
238 10.4 99 Unknown 
LTCCS Codebook DriverDecisionAggression Data Set  93 


Codebook - DriverDrugs Data Set 

DriverDrugs Data Set 

The DriverDrugs data set contains information supporting the analysts assessment on the drivers 
use of any drug prior to the crash. One record of this information exists for each drug. 

The DriverDrugs data set contains the variables CaseID, PSU, PSUStrat, RATWeight, and 
VehicleNumber. CaseID, VehicleNumber and DrugName uniquely identify each record in this data 
set. CaseID and VehicleNumber should be used to merge the DriverDrugs data set with vehicle level 
data sets. 

Format 

Type 

Length

Variable Name 

OT15F 

Numeric 

8

DrugType 

Definition: Establishes the type of drug specified in the Drug Name variable. 

N 

Prcnt 

Code 

Label
994 68.2 1 Prescription
361 24.8 2 Over the counter
103 7.1 3 Illegal 

Format 

Type 

Length

Variable Name 

$50 

Char 

50

DrugName 

Definition: Name of drug(s) used  includes illegal drugs, over-the-counter drugs, and prescription 
drugs. 

N 

Prcnt 

Code 

Label 

1 0.1 * Accolate 
5 0.3 * Accupril 
3 0.2 * Accupril-BP 
2 0.1 * Acetaminophen/ Codeine 
3 0.2 * Aciphex 
2 0.1 * Actifed 
6 0.4 * Actos 
1 0.1 * Adalat CC 
1 0.1 * Advair 
28 1.9 * Advil 
------------------------------
1 0.1 * Zestoretic 
9 0.6 * Zestril 
5 0.3 * Ziac 
2 0.1 * Zithromax 
13 0.9 * Zocor 
15 1.0 * Zoloft 
1 0.1 * Zovirax 
2 0.1 * Zyban 
LTCCS Codebook DriverDrugs Data Set  94 


Codebook - DriverDrugs Data Set 

N 

Prcnt 

Code 

Label 

1 0.1 * Zyprexa 
11 0.8 * Zyrtec 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 
Variable Name 

Format 

Type 

Length 

OT16F 

Numeric 

8

DriverReported 

Definition: Establishes whether or not the drug usage was reported by the driver. 
N Prcnt Code Label 
951 65.2 1 No 
507 34.8 2 Yes 
Variable Name 
TestResult 
Format 
OT63F 
Type 
Numeric 
Length 
8 

Definition: Documents the results of drug tests performed on the driver.
N 

Prcnt 

Code 

Label 

1 0.1 0.03 0.03 
1 0.1 0.05 0.05 
1 0.1 0.09 0.09 
1 0.1 0.38 0.38 
1 0.1 0.45 0.45 
1 0.1 0.76 0.76 
1 0.1 0.83 0.83 
1 0.1 8 8 
1 0.1 34 34 
2 0.1 50 50 
1 0.1 90 90 
1 0.1 106 106 
1 0.1 550 550 
1 0.1 99995 None given 
1,353 92.8 99996 Legal Drug, Test Results Not Collected 
35 2.4 99997 Drug Test Positive, Measured Value Unknown 
55 3.8 99999 Unknown 
LTCCS Codebook DriverDrugs Data Set  95 


Codebook - DriverHealth Data Set 

DriverHealth Data Set 

The DriverHealth data set contains a variety of data supporting the analysts assessment. It focuses 
particularly on the area of driver health. One record of this information exists for each vehicle/driver. 

The DriverHealth data set contains the variables CaseID, PSU, PSUStrat, RATWeight, and 
VehicleNumber. CaseID and VehicleNumber uniquely identify each record in this data set and 
should be used to merge the DriverHealth data set with other vehicle level data sets. 

Format 

Type 

Length

Variable Name 

OT18F 

Numeric 

8

ADHCorrectedVision 

Definition: Documents the drivers corrected vision level.
N 

Prcnt 

Code 

Label 

5 0.2 2015 2015
252 11.0 2020 2020

1 0.0 2025 2025 

12 0.5 2030 2030 

8 0.4 2040 2040 

1 0.0 2045 2045 

3 0.1 2060 2060 

1 0.0 2738 2738 

1 0.0 3025 3025 

1 0.0 4030 4030 

1 0.0 5030 5030 

29 1.3 9797 No Test Given 

7 0.3 9898 Not Applicable 
1,962 85.9 9999 Unknown 

Format 

Type 

Length

Variable Name 

AP2U 

Numeric 

8

IllnessFactorCount 

Definition: Documents the number of illness factors coded for this driver. 
N 

Prcnt 

Code 

Label 
1,670 73.1 0 0 

68 3.0 1 1 

1 0.0 2 2 

24 1.1 7 No Driver Present
521 22.8 9 Unknown 

LTCCS Codebook DriverHealth Data Set  96 


Codebook - DriverHealth Data Set 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

HeartAttack 

Definition: Establishes whether or not the driver experienced a heart attack prior to the crash event. 
(This variable was originally an attribute choice under the variable Illness.) 

N Prcnt Code Label 
2,272 99.5 0 Absent 
12 0.5 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

EpilepticSeizure 

Definition: Establishes whether or not the driver experienced an epileptic seizure prior to the crash 
event. (This variable was originally an attribute choice under the variable Illness.) 

N Prcnt Code Label 
2,282 99.9 0 Absent 
2 0.1 1 Present 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

OtherSeizure 

Definition: Establishes whether or not the driver experienced a seizure prior to the crash event that 
was not related to epilepsy. (This variable was originally an attribute choice under the variable 

Illness.) 
N Prcnt Code Label 
2,280 99.8 0 Absent 
4 0.2 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

DiabeticBlackout 

Definition: Establishes whether or not the driver experienced a blackout prior to the crash event and 
that this event can be traced to a medically diagnosed diabetic condition (e.g. driver blacks out as a 
result of insulin shock). (This variable was originally an attribute choice under the variable Illness.) 

N Prcnt Code Label 
2,279 99.8 0 Absent 
5 0.2 1 Present 

LTCCS Codebook DriverHealth Data Set  97 


Codebook - DriverHealth Data Set 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

OtherBlackout 

Definition: Establishes whether or not the driver experienced a blackout prior to the crash event and 
that this event is not related to a diabetic condition. (This variable was originally an attribute choice 

under the variable Illness.) 
N Prcnt Code Label 
2,277 99.7 0 Absent 
7 0.3 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

ColdFlu 

Definition: Establishes whether or not the driver is operating the vehicle while experiencing severe 
cold/flu symptoms which influence his/her driving performance. (This variable was originally an 
attribute choice under the variable Illness.) 

N Prcnt Code Label 
2,280 99.8 0 Absent 
4 0.2 1 Present 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

OtherIllness 

Definition: Establishes whether or not the driver experiences an illness or physical symptoms that 
are not described under the other illness variables. (This variable was originally an attribute choice 
under the variable Illness and was the Other (specify) attribute.) 

N Prcnt Code Label 
2,248 98.4 0 Absent 
36 1.6 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

NormalVision 

Definition: Establishes whether or not the driver wears corrective lenses to improve vision levels. 
(This variable was originally an attribute choice under the variable Vision.) 

N Prcnt Code Label 
1,278 56.0 0 Absent 
1,006 44.0 1 Present 

LTCCS Codebook DriverHealth Data Set  98 


Codebook - DriverHealth Data Set 

Format 

Type 

LengthVariable Name 

AP1U 

Numeric 

8 

Definition: Establishes whether or not the driver has been diagnosed with an uncorrected vision 
level that exceeds 20/2800. (This variable was originally an attribute choice under the variable 

LegallyBlind 

Vision.) 
N Prcnt Code Label 
2,284 100.0 0 Absent 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

Myopic 

Definition: Establishes whether or not the driver wears corrective lenses (including contact lenses) 
to compensate for a near-sighted condition. (This variable was originally an attribute choice under 

the variable Vision.) 
N Prcnt Code Label 
1,991 87.2 0 Absent 
293 12.8 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

Hyperopic 

Definition: Establishes whether or not the driver wears corrective lenses (including contact lenses) 
to compensate for a far-sighted condition. (This variable was originally an attribute choice under the 

variable Vision.) 
N Prcnt Code Label 
2,159 94.5 0 Absent 
125 5.5 1 Present 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

Glaucoma 

Definition: Establishes whether or not the driver has been diagnosed as having glaucoma. (This 
variable was originally an attribute choice under the variable Vision.) 

N 

Prcnt 

Code 

Label 
2,284 100.0 0 Absent 

LTCCS Codebook DriverHealth Data Set  99 


Codebook - DriverHealth Data Set 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

ColorBlind 

Definition: Establishes whether or not the driver has been diagnosed as being color blind. (This 
variable was originally an attribute choice under the variable Vision.) 

N 

Prcnt 

Code 

Label 
2,284 100.0 0 Absent 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

Astigmatic 

Definition: Establishes whether or not the driver has been diagnosed as having astigmatism. (This 
variable was originally an attribute choice under the variable Vision.) 

N Prcnt Code Label 
2,259 98.9 0 Absent 
25 1.1 1 Present 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

OtherVision 

Definition: Establishes whether or not the driver has a vision problem that is not described by the 
other vision variables. (This variable was originally an attribute choice under the variable Vision and 
was the Other (specify) attribute.) 

N Prcnt Code Label 
2,073 90.8 0 Absent 
211 9.2 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

UnknownVision 

Definition: Establishes whether or not the driver was coded as Vision problem unknown. This 
code is used when there is insufficient information to determine if the driver has a vision related 
problem/deficiency. (This variable was originally an attribute choice under the variable Vision and 
was the Unknown attribute.) 

N Prcnt Code Label 
1,671 73.2 0 Absent 
613 26.8 1 Present 

LTCCS Codebook DriverHealth Data Set  100 


Codebook - DriverHealth Data Set 

Format 

Type 

Length

Variable Name 

AP2U 

Numeric 

8

OtherFactorCount 

Definition: Documents the number of other physical factors coded to this driver.
N 

Prcnt 

Code 

Label 
1,468 64.3 0 0 
136 6.0 1 1 

16 0.7 2 2 
1 0.0 3 3 
24 1.1 7 No Driver Present
639 28.0 9 Unknown 
Format 

Type Length

Variable Name 

AP1U 

Numeric 

8

NoFactors 

Definition: Documents whether or not there were no other physical factors coded to this driver. 

N Prcnt Code Label 
817 35.8 0 Absent 
1,467 64.2 1 Present 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

HearingImpairment 

Definition: Establishes whether or not the driver has a diagnosed hearing impairment. (This 
variable was originally an attribute choice under the variable Other Physical Factors.) 

N Prcnt Code Label 
2,249 98.5 0 Absent 
35 1.5 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

Prosthesis 

Definition: Establishes whether or not the driver is wearing a prosthesis. (This variable was 
originally an attribute choice under the variable Other Physical Factors.) 

N Prcnt Code Label 
2,283 100.0 0 Absent 
1 0.0 1 Present 

LTCCS Codebook DriverHealth Data Set  101 


Codebook - DriverHealth Data Set 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8 

Definition: Establishes whether or not the driver has paralysis of the lower limbs. (This variable was 
originally an attribute choice under the variable Other Physical Factors.) 
N 

Paraplegia 

Prcnt 

Code 

Label 
2,284 100.0 0 Absent 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

StrenuousRecreation 

Definition: Establishes whether or not the driver participates in strenuous recreational activities 
during the seven day interval preceding the crash. (This variable was originally an attribute choice 
under the variable Other Physical Factors.) 

N Prcnt Code Label 
2,240 98.1 0 Absent 
44 1.9 1 Present 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

StrenuousNonWork 

Definition: Establishes whether or not the driver participates/engages in strenuous non-work 
activities (e.g. household chores) during the seven day interval preceding the crash. (This variable 
was originally an attribute choice under the variable Other Physical Factors.) 

N Prcnt Code Label 
2,243 98.2 0 Absent 
41 1.8 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

SleepApnea 

Definition: Establishes whether or not the driver has an obstructive sleep apnea disorder. (This 
variable was originally an attribute choice under the variable Other Physical Factors.) 

N Prcnt Code Label 
2,262 99.0 0 Absent 
22 1.0 1 Present 

LTCCS Codebook DriverHealth Data Set  102 


Codebook - DriverHealth Data Set 

Format 

Type 

LengthVariable Name 

AP1U 

Numeric 

8

OtherFactorPhysical 

Definition: Establishes whether or not the driver has a relevant physical factor that is not described 
in the other physical factor variables. (This variable was originally an attribute choice under the 
variable Other Physical Factors and was the Other (specify) attribute choice.) 

N Prcnt Code Label 
2,256 98.8 0 Absent 
28 1.2 1 Present 

LTCCS Codebook DriverHealth Data Set  103 


Codebook - DriverRecognitionDistraction Data Set 

DriverRecognitionDistraction Data Set 

The DriverRecognitionDistraction data set contains a variety of data supporting the analysts 
assessment. It focuses particularly on the drivers recognition and distraction. One record of this 
information exists for each vehicle/driver. 

The DriverRecognitionDistraction data set contains the variables CaseID, PSU, PSUStrat, 
RATWeight, and VehicleNumber. CaseID and VehicleNumber uniquely identify each record in this 
data set and should be used to merge the DriverRecognitionDistraction data set with other vehicle 
level data sets. 

Format 

Type 

Length

Variable Name 

ML734F 

Numeric 

8

Inattention 

Definition: Documents driver inattention (i.e. focusing on internal thought processes) and the 
nature of the involved thought processes. 

N 

Prcnt 

Code 

Label 
1,551 67.9 0 No Inattention Factors 

11 0.5 1 Personal problem 
18 0.8 2 Family problem 
4 0.2 3 Financial problem 
9 0.4 4 Preceding argument 
11 0.5 5 Future event (vacation, wedding, etc.) 
24 1.1 7 No driver present
118 5.2 8 Other (specify)
538 23.6 9 Unknown 
Format 

Type 

Length

Variable Name 

ML721F 

Numeric 

8

Conversation 

Definition: Documents driver participation in conversation. The conversation can be associated 
with a variety of sources including conversing with passengers, talking on a cell phone, or talking on 
a CB radio. 

N 

Prcnt 

Code 

Label 
1,929 84.5 0 Not conversing 

33 1.4 1 Conversing with passenger 
9 0.4 2 Talking on phone 
12 0.5 3 Talking on CB radio 
24 1.1 7 No driver present 
1 0.0 8 Other (specify)
276 12.1 9 Unknown 
LTCCS Codebook DriverRecognitionDistraction Data Set  104 


Codebook - DriverRecognitionDistraction Data Set 

Format 

Type 

Length

Variable Name 

ML737F 

Numeric 

8

Subject 

Definition: Documents the nature of the conversation the driver is involved in during the pre-crash 
phase. 

N 

Prcnt 

Code 

Label
1,926 84.3 0 Not conversing

13 0.6 1 Business 
8 0.4 2 Social 
6 0.3 3 Family matter 
1 0.0 4 Argument 
24 1.1 7 No driver present 
16 0.7 8 Other (specify)
290 12.7 9 Unknown 
Format 

Type 

Length

Variable Name 

ML2462F 

Numeric 

8

Conversant 

Definition: Documents the relationship between the driver and the person the driver was 
conversing with during the immediate pre-crash phase. 

N 

Prcnt 

Code 

Label 
1,932 84.6 0 Not conversing 

6 0.3 1 No relation/stranger 
13 0.6 2 Business 
8 0.4 3 Social (friend) 
3 0.1 4 Boyfriend/girlfriend 
8 0.4 5 Husband/wife 
2 0.1 6 Driver/co-driver 
12 0.5 7 Parent/child 
24 1.1 77 No driver present 
8 0.4 88 Other (specify)
268 11.7 99 Unknown 
LTCCS Codebook DriverRecognitionDistraction Data Set  105 


Codebook - DriverRecognitionDistraction Data Set 
Variable Name Format Type Length 
OutsideLocation ML743F Numeric 8 

Definition: Documents the location of the exterior factor with respect to the drivers location at the 
time the distraction first occurred. 

N 

Prcnt 

Code 

Label 
1,608 70.4 0 No exterior factors 

47 2.1 1 Forward 
33 1.4 2 Forward, left 
29 1.3 3 Forward, right 
18 0.8 4 Left 
18 0.8 5 Right 
21 0.9 6 Rearward 
24 1.1 7 No driver present 
12 0.5 8 Other (specify)
474 20.8 9 Unknown 
Format 

Type 

Length

Variable Name 

ML750F 

Numeric 

8

ADDSurveillance 

Definition: Establishes inadequate surveillance behavior on the part of the driver of this vehicle. 
N 

Prcnt 

Code 

Label 
1,634 71.5 0 No additional surveillance factors 

83 3.6 1 Failed to look far enough ahead 
11 0.5 2 Failed to look to either side ahead 
65 2.8 3 Failed to look to side 
16 0.7 4 Failed to look to rear (mirrors) 
4 0.2 5 Failed to look other (specify) 
82 3.6 6 Looked, but did not see 
24 1.1 77 No driver present 
10 0.4 88 Other (specify)
355 15.5 99 Unknown 
LTCCS Codebook DriverRecognitionDistraction Data Set  106 


Codebook - DriverRecognitionDistraction Data Set 

Format 

Type 

Length

Variable Name 

ML751F 

Numeric 

8

Tracking 

Definition: Establishes how the driver tracked the exterior factor when this factor is located behind 
the vehicle. 

N 

Prcnt 

Code 

Label
1,608 70.4 0 No exterior factors

71 3.1 1 Turned head 
3 0.1 2 Used rearview mirror 
20 0.9 3 Used side mirror 
24 1.1 7 No driver present 
1 0.0 8 Other (specify)
557 24.4 9 Unknown 
Format 

Type 

Length

Variable Name 

ML745F 

Numeric 

8

ADDRecognition 

Definition: Establishes the occurrence of other recognition factors related to this driver. 

N 

Prcnt 

Code 

Label
1,788 78.3 0 No other recognition factors

17 0.7 1 Impending problem masked by traffic flow pattern 
27 1.2 2 Driver focused on extraneous vehicle 
71 3.1 3 Other recognition error (specify) 
24 1.1 7 No driver present
357 15.6 9 Unknown 
Format 

Type 

Length

Variable Name 

AP2U 

Numeric 

8

InteriorDistractionCount 

Definition: Documents the number of interior distractions that were coded for this driver. 

N Prcnt Code Label 
1,671 73.2 0 0 
60 2.6 1 1 
24 1.1 7 No Driver Present 
529 23.2 9 Unknown 

LTCCS Codebook DriverRecognitionDistraction Data Set  107 


Codebook - DriverRecognitionDistraction Data Set 

Format 

Type 

LengthVariable Name 

AP1U 

Numeric 

8

OccupantMovement 

Definition: Documents whether or not the driver is distracted by other occupants in the vehicle. 
(This variable was originally an attribute choice under the variable Other Non-Driving Activities, 
which had to do with distractions internal to the vehicle.) 

N Prcnt Code Label 
2,283 100.0 0 Absent 
1 0.0 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

ADDDialingPhone 

Definition: Documents whether or not the driver is distracted as a result of either dialing or hanging 
up a phone during the pre-crash phase. (This variable was originally an attribute choice under the 
variable Other Non-Driving Activities, which had to do with distractions internal to the vehicle.) 

N 

Prcnt 

Code 

Label 
2,284 100.0 0 Absent 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

ADDAdjustingRadio 

Definition: Documents whether or not the driver is distracted as a result of attempting to adjust the 
sound system controls during the pre-crash phase. (This variable was originally an attribute choice 
under the variable Other Non-Driving Activities, which had to do with distractions internal to the 

vehicle.) 
N Prcnt Code Label 
2,281 99.9 0 Absent 
3 0.1 1 Present 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

OtherControls 

Definition: Documents whether or not the driver is distracted as a result of attempting to adjust the 
heat, vent or air conditioning controls during the pre-crash phase. This category also includes 
attempted adjustments to other OEM and after-market controls. (This variable was originally an 
attribute choice under the variable Other Non-Driving Activities, which had to do with distractions 
internal to the vehicle.) 

N Prcnt Code Label 
2,283 100.0 0 Absent 
1 0.0 1 Present 

LTCCS Codebook DriverRecognitionDistraction Data Set  108 


Codebook - DriverRecognitionDistraction Data Set 
Variable Name Format Type Length 
FloorRetrieval AP1U Numeric 8 

Definition: Documents whether or not the driver is distracted as a result of trying to retrieve an 
object from either the floor or seat while driving. The objects in this category include everything with 
the exception of items related to smoking or eating, which are addressed in the Other category. 
(This variable was originally an attribute choice under the variable Other Non-Driving Activities, 
which had to do with distractions internal to the vehicle.) 

N Prcnt Code Label 
2,273 99.5 0 Absent 
11 0.5 1 Present 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

OtherRetrieval 

Definition: Documents whether or not the driver is distracted as a result of trying to retrieve an 
object from a location other than the floor or seat while driving. Again, the objects in this category 
include everything with the exception of items related to smoking or eating, which are addressed in 
the Other category. (This variable was originally an attribute choice under the variable Other 
Non-Driving Activities, which had to do with distractions internal to the vehicle.) 

N Prcnt Code Label 
2,283 100.0 0 Absent 
1 0.0 1 Present 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

OtherInternal 

Definition: Documents whether or not the driver is distracted by internal factors not described in the 
other variables. Examples include smoking, eating, drinking, and reading-related activities. (This 
variable was originally an attribute choice under the variable Other Non-Driving Activities, and was 
the Other (specify) attribute choice.) 

N Prcnt Code Label 
2,241 98.1 0 Absent 
43 1.9 1 Present 

LTCCS Codebook DriverRecognitionDistraction Data Set  109 


Codebook - DriverRecognitionDistraction Data Set 
Variable Name Format Type Length 
ExteriorDistractionCount AP2U Numeric 8 

Definition: Documents the number of exterior distractions that were coded for this driver.
N 

Prcnt 

Code 

Label 
1,609 70.4 0 0 
173 7.6 1 1 

7 0.3 2 2 
24 1.1 7 No Driver Present
471 20.6 9 Unknown 
Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

ADDPreviousCrash 

Definition: Documents whether or not the driver removes his/her focus from the driving task to look 
at a previous crash (i.e. rubbernecking). (This variable was originally an attribute choice under the 
variable Exterior Factors and had to do with the driver focusing on factors that were exterior to the 

vehicle.) 
N Prcnt Code Label 
2,264 99.1 0 Absent 
20 0.9 1 Present 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

ApproachingTraffic 

Definition: Documents whether or not the driver removes his/her focus from the driving task to look 
at approaching traffic either in an adjoining lane or across a median area. (This variable was 
originally an attribute choice under the variable Exterior Factors and had to do with the driver 
focusing on factors that were exterior to the vehicle.) 

N Prcnt Code Label 
2,248 98.4 0 Absent 
36 1.6 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

StreetAddress 

Definition: Documents whether or not the driver removes his/her focus from the driving task to 
search for a street address (usually searching for a specific building number). (This variable was 
originally an attribute choice under the variable Exterior Factors and had to do with the driver 
focusing on factors that were exterior to the vehicle.) 

N Prcnt Code Label 
2,278 99.7 0 Absent 
6 0.3 1 Present 

LTCCS Codebook DriverRecognitionDistraction Data Set  110 


Codebook - DriverRecognitionDistraction Data Set 
Variable Name Format Type Length 
ExternalPerson AP1U Numeric 8 

Definition: Documents whether or not the driver removes his/her focus from the driving task to look 
at a person who is exterior to this vehicle. The person can be a pedestrian, bicyclist, skater, and an 
occupant of another vehicle or even a person in a building. (This variable was originally an attribute 
choice under the variable Exterior Factors and had to do with the driver focusing on factors that 

were exterior to the vehicle.) 
N Prcnt Code Label 
2,278 99.7 0 Absent 
6 0.3 1 Present 

Format 

Type 

LengthVariable Name 

AP1U 

Numeric 

8

Building 

Definition: Documents whether or not the driver removes his/her focus from the driving task to look 
at a building (usually as a result of seeing a feature of interest). (This variable was originally an 
attribute choice under the variable Exterior Factors and had to do with the driver focusing on factors 
that were exterior to the vehicle.) 

N 

Prcnt 

Code 

Label 
2,282 99.9 0 Absent 

2 0.1 1 Present 
Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

UnspecifiedExternal 

Definition: Documents whether or not the driver removes his/her focus from the driving task to focus 
on something exterior to the vehicle, but there is insufficient information to determine the direction or 
the specific object that is being examined. (This variable was originally an attribute choice under the 
variable Exterior Factors and had to do with the driver focusing on factors that were exterior to the 

vehicle.) 
N Prcnt Code Label 
2,281 99.9 0 Absent 
3 0.1 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

OtherExternal 

Definition: Documents whether or not the driver was distracted by something that is exterior to the 
vehicle and that is not adequately described by the other variables. (This variable was originally an 
attribute choice under the variable Exterior Factors and was the Other (specify) attribute choice.) 

N Prcnt Code Label 
2,170 95.0 0 Absent 
114 5.0 1 Present 

LTCCS Codebook DriverRecognitionDistraction Data Set  111 


Codebook - DriverSleep Data Set 

DriverSleep Data Set 

The DriverSleep data set contains a variety of data supporting the analysts assessment. It focuses 
particularly on the area of driver sleep patterns and fatigue. One record of this information exists for 
each vehicle/driver. 

The DriverSleep data set contains the variables CaseID, PSU, PSUStrat, RATWeight, and 
VehicleNumber. CaseID and VehicleNumber uniquely identify each record in this data set and 
should be used to merge the DriverSleep data set with other vehicle level data sets. 

Format 

Type 

Length

Variable Name 

$OT19F 

Char 

10

LastSleepHours 

Definition: Represents the number of hours the driver slept (most recent sleep interval). 

N 

Prcnt 

Code 

Label 

1 0.0 * 00:20 
5 0.2 * 01:00 
6 0.3 * 01:30 
1 0.0 * 01:45 
16 0.7 * 02:00 
5 0.2 * 02:30 
12 0.5 * 03:00 
6 0.3 * 03:30 
18 0.8 * 04:00 
10 0.4 * 04:30 
------------------------------
2 0.1 * 12:15 
6 0.3 * 12:30 
6 0.3 * 13:00 
3 0.1 * 13:30 
1 0.0 * 13:45 
4 0.2 * 14:00 
3 0.1 * 16:00 
1 0.0 * 22:30 
24 1.1 97:97 No driver present
726 31.8 99:99 Unknown 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

LTCCS Codebook DriverSleep Data Set  112 


Codebook - DriverSleep Data Set 

Format 

Type 

Length

Variable Name 

$OT19F 

Char 

10

LastSleepStart 

Definition: The time of day (military time) that the driver began his/her last sleep interval. 
N 

Prcnt 

Code 

Label 

49 2.1 * 00:00 
1 0.0 * 00:01 
1 0.0 * 00:15 
11 0.5 * 00:30 
32 1.4 * 01:00 
3 0.1 * 01:30 
1 0.0 * 01:45 
13 0.6 * 02:00 
8 0.4 * 02:30 
1 0.0 * 02:45 
------------------------------
89 3.9 * 22:30 
2 0.1 * 22:45
177 7.7 * 23:00
3 0.1 * 23:15 
36 1.6 * 23:30 
1 0.0 * 23:40 
2 0.1 * 23:45 
1 0.0 * 23:59 
24 1.1 97:97 No driver present
788 34.5 99:99 Unknown 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Format 

Type 

Length

Variable Name 

$OT19F 

Char 

10

LastSleepEnd 

Definition: The time of day (military time) that the driver awoke from his/her last sleep interval. 
N 

Prcnt 

Code 

Label 

16 0.7 * 00:00 
2 0.1 * 00:30 
2 0.1 * 00:45 
13 0.6 * 01:00 
1 0.0 * 01:10 
2 0.1 * 01:15 
1 0.0 * 01:25 
10 0.4 * 01:30 
1 0.0 * 01:40 
LTCCS Codebook DriverSleep Data Set  113 


Codebook - DriverSleep Data Set 

N 

Prcnt 

Code 

Label 

2 0.1 * 01:45 
------------------------------
3 0.1 * 21:30 
10 0.4 * 22:00 
2 0.1 * 22:15 
5 0.2 * 22:30 
1 0.0 * 22:45 
5 0.2 * 23:00 
2 0.1 * 23:15 
2 0.1 * 23:30 
24 1.1 97:97 No driver present
777 34.0 99:99 Unknown 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Variable Name 

Format 

Type 

Length 

$OT19F 

Char 

10

HoursSinceSleep 

Definition: Represents the number of hours that have passed since the driver has awoken from 

his/her last sleep interval. 

N 

Prcnt 

Code 

Label 

1 0.0 * 00:08 
1 0.0 * 00:10 
2 0.1 * 00:15 
3 0.1 * 00:21 
1 0.0 * 00:22 
1 0.0 * 00:23 
1 0.0 * 00:29 
3 0.1 * 00:30 
3 0.1 * 00:35 
2 0.1 * 00:36 
------------------------------
1 0.0 * 20:30 
1 0.0 * 20:35 
1 0.0 * 22:00 
1 0.0 * 22:15 
2 0.1 * 22:30 
1 0.0 * 36:51 
1 0.0 * 38:36 
24 1.1 97:97 No driver present 
1 0.0 98:98 Not applicable
774 33.9 99:99 Unknown 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

LTCCS Codebook DriverSleep Data Set  114 


Codebook - DriverSleep Data Set 

Format 

Type 

Length

Variable Name 

$OT19F 

Char 

10

MainSleepHours 

Definition: If the drivers last sleep interval was less than 4 hours, this is the number of hours that 
the driver slept in his/her previous sleep interval where that interval was greater than 4 hours (i.e. 
main sleep interval). 

N 

Prcnt 

Code 

Label 

1 0.0 * 02:00 
1 0.0 * 02:30 
2 0.1 * 03:00 
1 0.0 * 03:30 
1 0.0 * 04:00 
1 0.0 * 04:30 
1 0.0 * 04:45 
4 0.2 * 05:00 
6 0.3 * 06:00 
1 0.0 * 06:30 
------------------------------
1 0.0 * 09:15 
1 0.0 * 09:30 
4 0.2 * 10:00 
1 0.0 * 10:30 
1 0.0 * 11:00 
1 0.0 * 11:30 
2 0.1 * 12:00 
24 1.1 97:97 No driver present 
1,482 64.9 98:98 Not applicable
735 32.2 99:99 Unknown 

Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Format 

Type 

Length

Variable Name 

$OT19F 

Char 

10

MainSleepStart 

Definition: The time of day (military time) that the drivers main sleep interval began. This variable 
should be coded when the drivers last sleep interval was less than 4 hours. 

N 

Prcnt 

Code 

Label 

3 0.1 * 00:00 
1 0.0 * 01:00 
2 0.1 * 02:00 
1 0.0 * 03:30 
1 0.0 * 04:30 
1 0.0 * 05:00 
2 0.1 * 06:00 
1 0.0 * 06:30 
LTCCS Codebook DriverSleep Data Set  115 


Codebook - DriverSleep Data Set 

N 

Prcnt 

Code 

Label 

1 0.0 * 07:30 
1 0.0 * 09:00 
------------------------------
3 0.1 * 21:00 
2 0.1 * 21:30 
3 0.1 * 22:00 
1 0.0 * 22:30 
3 0.1 * 23:00 
1 0.0 * 23:15 
1 0.0 * 23:30 
24 1.1 97:97 No driver present 
1,482 64.9 98:98 Not applicable
737 32.3 99:99 Unknown 

Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Variable Name 

Format 

Type 

Length 

$OT19F 

Char 

10

MainSleepEnd 

Definition: The time of day (military time) that the drivers main sleep interval ended. This variable 
should be coded when the drivers last sleep interval was less than 4 hours. 

N 

Prcnt 

Code 

Label 

1 0.0 * 00:00 
2 0.1 * 02:00 
1 0.0 * 03:00 
1 0.0 * 03:30 
4 0.2 * 04:00 
3 0.1 * 04:30 
1 0.0 * 05:30 
4 0.2 * 06:00 
2 0.1 * 06:30 
2 0.1 * 07:00 
------------------------------
3 0.1 * 12:00 
2 0.1 * 14:00 
1 0.0 * 14:30 
2 0.1 * 15:00 
2 0.1 * 19:30 
1 0.0 * 20:45 
1 0.0 * 21:00 
24 1.1 97:97 No driver present 
1,482 64.9 98:98 Not applicable
736 32.2 99:99 Unknown 

Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

LTCCS Codebook DriverSleep Data Set  116 


Codebook - DriverSleep Data Set 

Format 

Type 

Length

Variable Name 

$OT19F 

Char 

10

HoursDriving 

Definition: Represents the number of hours the driver has been driving since he/she last had a 

break of at least 8 hours. 

N 

Prcnt 

Code 

Label 

1 0.0 * 00:00 
1 0.0 * 00:01 
1 0.0 * 00:04 
4 0.2 * 00:05 
3 0.1 * 00:08 
14 0.6 * 00:10 
1 0.0 * 00:12 
1 0.0 * 00:13 
1 0.0 * 00:14 
26 1.1 * 00:15 
------------------------------
1 0.0 * 15:15 
1 0.0 * 16:00 
1 0.0 * 16:30 
1 0.0 * 18:00 
1 0.0 * 18:30 
1 0.0 * 19:30 
1 0.0 * 24:00 
24 1.1 97:97 No driver present
845 37.0 98:98 Not applicable
479 21.0 99:99 Unknown 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Format 

Type 

Length

Variable Name 

$OT19F 

Char 

10

ADSHoursOnDuty

Definition: Represents the number of hours the driver has been on duty since he/she last had a 

break of at least 8 hours. 

N 

Prcnt 

Code 

Label 

65 2.8 * 00:00 
1 0.0 * 00:01 
1 0.0 * 00:05 
2 0.1 * 00:08 
7 0.3 * 00:10 
1 0.0 * 00:13 
13 0.6 * 00:15 
1 0.0 * 00:16 
LTCCS Codebook DriverSleep Data Set  117 


Codebook - DriverSleep Data Set 

N 

Prcnt 

Code 

Label 

1 0.0 * 00:18 
1 0.0 * 00:19 
------------------------------
2 0.1 * 15:00 
1 0.0 * 16:30 
1 0.0 * 17:30 
1 0.0 * 18:00 
1 0.0 * 19:00 
2 0.1 * 19:30 
2 0.1 * 20:00 
24 1.1 97:97 No driver present
707 31.0 98:98 Not applicable
415 18.2 99:99 Unknown 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Variable Name 

Format 

Type 

Length 

$OT19F 

Char 

10

WeekLongest 

Definition: Represents the number of hours the driver worked on his/her longest workday in the 

7-day interval preceding the crash. 

N 

Prcnt 

Code 

Label 

2 0.1 * 04:00 
2 0.1 * 04:30 
7 0.3 * 05:00 
3 0.1 * 05:30 
18 0.8 * 06:00 
3 0.1 * 06:15 
5 0.2 * 06:30 
80 3.5 * 07:00 
1 0.0 * 07:10 
1 0.0 * 07:15 
------------------------------
13 0.6 * 13:00 
3 0.1 * 13:30 
1 0.0 * 13:45 
9 0.4 * 14:00 
5 0.2 * 15:00 
3 0.1 * 16:00 
1 0.0 * 17:00 
1 0.0 * 20:00 
24 1.1 97:97 No driver present
793 34.7 99:99 Unknown 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

LTCCS Codebook DriverSleep Data Set  118 


Codebook - DriverSleep Data Set 
Variable Name Format Type Length 
WeekShortest $OT19F Char 10 

Definition: Represents the number of hours the driver worked on his/her shortest workday in the 

7-day interval preceding the crash. 

N 

Prcnt 

Code 

Label 

1 0.0 * 00:30 
5 0.2 * 01:00 
4 0.2 * 01:30 
34 1.5 * 02:00 
4 0.2 * 02:30 
33 1.4 * 03:00 
2 0.1 * 03:30 
72 3.2 * 04:00 
1 0.0 * 04:15 
8 0.4 * 04:30 
------------------------------
1 0.0 * 09:45 
19 0.8 * 10:00 
1 0.0 * 10:30 
1 0.0 * 11:00 
1 0.0 * 11:30 
1 0.0 * 12:00 
1 0.0 * 13:45 
1 0.0 * 14:00 
24 1.1 97:97 No driver present
810 35.5 99:99 Unknown 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Format 

Type 

Length

Variable Name 

$OT19F 

Char 

10

WeekAverage 

Definition: Represents the average number of hours the driver worked per day in the 7-day interval 
preceding the crash. 

N 

Prcnt 

Code 

Label 

15 0.7 * 04:00 
2 0.1 * 04:30 
24 1.1 * 05:00 
10 0.4 * 05:30 
91 4.0 * 06:00 
1 0.0 * 06:20 
39 1.7 * 06:30 
1 0.0 * 06:40 
LTCCS Codebook DriverSleep Data Set  119 


Codebook - DriverSleep Data Set 

N 

Prcnt 

Code 

Label 

5 0.2 * 06:45 
210 9.2 * 07:00 
------------------------------

3 0.1 * 10:30 
11 0.5 * 11:00 
1 0.0 * 11:25 
1 0.0 * 11:30 
5 0.2 * 12:00 
1 0.0 * 13:00 
1 0.0 * 13:45 
1 0.0 * 14:30 
24 1.1 97:97 No driver present
768 33.6 99:99 Unknown 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Variable Name 

Format 

Type 

Length 

ML674F 

Numeric 

8

Rotation 

Definition: Establishes the occurrence of a rotating sleep period (i.e. beginning of sleep interval 
changes during the period). 

N 

Prcnt 

Code 

Label 
126 5.5 1 Yes 
1,451 63.5 2 No 

24 1.1 7 No driver present
683 29.9 9 Unknown 
Variable Name 

Format 

Type 

Length 

$OT19F 

Char 

10

HoursWorked 

Definition: Represents the number of hours the driver worked on the day of the crash. 
N 

Prcnt 

Code 

Label
237 10.4 * 00:00

1 0.0 * 00:01 
1 0.0 * 00:03 
2 0.1 * 00:05 
2 0.1 * 00:08 
7 0.3 * 00:10 
1 0.0 * 00:13 
9 0.4 * 00:15 
1 0.0 * 00:16 
1 0.0 * 00:18 
------------------------------
LTCCS Codebook DriverSleep Data Set  120 


Codebook - DriverSleep Data Set 

N 

Prcnt 

Code 

Label 

1 0.0 * 14:45 
1 0.0 * 14:50 
3 0.1 * 15:00 
1 0.0 * 16:30 
1 0.0 * 16:48 
1 0.0 * 18:00 
1 0.0 * 19:00 
24 1.1 97:97 No driver present
124 5.4 98:98 Not applicable
730 32.0 99:99 Unknown 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Format 

Type 

Length

Variable Name 

$OT19F 

Char 

10

ADSLongestDay

Definition: The number of hours the driver slept in the 7-day interval preceding the crash that 

represents his/her longest interval of daily sleep. 

N 

Prcnt 

Code 

Label 

25 1.1 * 00:00 
1 0.0 * 02:00 
1 0.0 * 02:45 
7 0.3 * 03:00 
1 0.0 * 03:30 
9 0.4 * 04:00 
3 0.1 * 04:30 
1 0.0 * 04:38 
14 0.6 * 05:00 
1 0.0 * 05:30 
------------------------------
1 0.0 * 16:48 
3 0.1 * 17:00 
6 0.3 * 18:00 
1 0.0 * 18:18 
1 0.0 * 18:30 
1 0.0 * 19:00 
1 0.0 * 20:00 
1 0.0 * 24:00 
24 1.1 97:97 No driver present
134 5.9 98:98 Not applicable
701 30.7 99:99 Unknown 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

LTCCS Codebook DriverSleep Data Set  121 


Codebook - DriverSleep Data Set 

Format 

Type 

Length

Variable Name 

$OT19F 

Char 

10

ADSShortestDay

Definition: The number of hours the driver slept in the 7-day interval preceding the crash that 

represents his/her shortest interval of daily sleep. 

N 

Prcnt 

Code 

Label
164 7.2 * 00:00

2 0.1 * 00:10 
6 0.3 * 00:15 
10 0.4 * 00:30 
2 0.1 * 00:45 
15 0.7 * 01:00 
3 0.1 * 01:15 
1 0.0 * 01:21 
2 0.1 * 01:25 
6 0.3 * 01:30 
------------------------------
3 0.1 * 13:00 
1 0.0 * 13:30 
2 0.1 * 14:00 
1 0.0 * 14:30 
1 0.0 * 15:00 
2 0.1 * 18:00 
1 0.0 * 24:00 
24 1.1 97:97 No driver present
134 5.9 98:98 Not applicable
729 31.9 99:99 Unknown 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Format 

Type 

Length

Variable Name 

$OT19F 

Char 

10

ADSAverageDay

Definition: Represents the average number of hours the driver slept per day in the 7-day interval 
preceding the crash. 

N 

Prcnt 

Code 

Label 

26 1.1 * 00:00 
1 0.0 * 00:45 
1 0.0 * 01:06 
3 0.1 * 02:00 
2 0.1 * 02:45 
11 0.5 * 03:00 
1 0.0 * 03:25 
2 0.1 * 03:30 
1 0.0 * 03:50 
LTCCS Codebook DriverSleep Data Set  122 


Codebook - DriverSleep Data Set 

N 

Prcnt 

Code 

Label 

1 0.0 * 03:57 
------------------------------
7 0.3 * 13:00 
5 0.2 * 13:30 
6 0.3 * 14:00 
1 0.0 * 14:30 
1 0.0 * 15:00 
2 0.1 * 18:00 
1 0.0 * 24:00 
24 1.1 97:97 No driver present
138 6.0 98:98 Not applicable
704 30.8 99:99 Unknown 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Variable Name 

Format 

Type 

Length 

$OT20F 

Char 

10

LastWeekHours 

Definition: Represents the total number of hours that the driver worked on his primary job during the 
7-day interval preceding the crash. 

N 

Prcnt 

Code 

Label 

24 1.1 * 00:00 
1 0.0 * 00:30 
1 0.0 * 02:45 
1 0.0 * 03:00 
1 0.0 * 04:00 
1 0.0 * 04:38 
1 0.0 * 05:00 
1 0.0 * 05:30 
4 0.2 * 06:00 
1 0.0 * 06:30 
------------------------------
1 0.0 * 79:30 
2 0.1 * 80:00 
1 0.0 * 82:00 
1 0.0 * 84:00 
1 0.0 * 90:00 
1 0.0 * 91:00 
1 0.0 * 97:15 
24 1.1 97:97 No driver present
134 5.9 98:98 Not applicable
756 33.1 99:99 Unknown 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

LTCCS Codebook DriverSleep Data Set  123 


Codebook - DriverSleep Data Set 

Format 

Type 

Length

Variable Name 

$OT19F 

Char 

10

LastWeekMoonlight 

Definition: Represents the number of hours the driver worked on his/her second job during the 

7-day interval preceding the crash. 

N 

Prcnt 

Code 

Label 

11 0.5 * 00:00 
1 0.0 * 00:05 
1 0.0 * 05:00 
2 0.1 * 06:00 
1 0.0 * 09:00 
5 0.2 * 10:00 
1 0.0 * 10:50 
1 0.0 * 12:00 
2 0.1 * 14:00 
1 0.0 * 15:00 
------------------------------
2 0.1 * 32:00 
1 0.0 * 35:00 
1 0.0 * 38:00 
2 0.1 * 40:00 
1 0.0 * 45:00 
1 0.0 * 54:00 
1 0.0 * 57:00 
24 1.1 97:97 No driver present 
1,637 71.7 98:98 Not applicable
573 25.1 99:99 Unknown 

Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

LTCCS Codebook DriverSleep Data Set  124 


Codebook - Environment Data Set 

Environment Data Set 

The Environment data set contains information on the physical parameters of the roadway in the 
vicinity of the crash, any adverse weather conditions, how the driver was operating the vehicle and 
any distraction information if applicable. One record of this information is stored for each vehicle. 

The Environment data set contains the variables CaseID, PSU, PSUStrat, RATWeight, and 
VehicleNumber. CaseID and VehicleNumber uniquely identify each record in this data set and 
should be used to merge the Environment data set with other vehicle level data sets. 

Format 

Type 

Length

Variable Name 

ML519F 

Numeric 

8

RoadRelation 

Definition: Describes the characteristics of this vehicles roadway environment just prior to the 
critical precrash event. 

N 

Prcnt 

Code 

Label 
2,199 96.3 1 On roadway 

49 2.1 2 Shoulder 
9 0.4 3 Median 
22 1.0 4 Roadside 
2 0.1 5 Outside right-of-way 
3 0.1 8 Gore 
Format 

Type 

Length

Variable Name 

ML1422F 

Numeric 

8

Junction 

Definition: Describes this vehicles roadway as it relates to a junction. A junction is, in general, the 
area formed by the connection of two roadways. It includes (1) all at-grade intersections, (2) 
connections between a driveway access or alley access and a roadway that is not a driveway access 
or an alley access, (3) connections between two alley accesses or driveway accesses, or (4) a 
connection between a driveway and an alley access. An interchange is an area around a grade 
separation that involves at least two trafficways. Included within its boundaries are: (1) all ramps that 
connect the roadways, and (2) each roadway entering or leaving the interchange to a point 30 meters 
(100 feet) beyond the gore or curb return at the outermost ramp connection for the roadway. Included 
within an interchange area are intersections, driveway accesses, and roadway sections that are 
non-junction. 

N 

Prcnt 

Code 

Label 

1,336 58.5 1 Non-junction 

314 13.7 2 Intersection 

159 7.0 3 Intersection related 

79 3.5 4 Driveway, alley access, etc.
215 9.4 5 Entrance/exit ramp related
10 0.4 6 Rail grade crossing 
7 0.3 7 In crossover
161 7.0 15 Other location in interchange
3 0.1 99 Unknown 
LTCCS Codebook Environment Data Set  125 


Codebook - Environment Data Set 

Format 

Type 

LengthVariable Name 

ML1136F 

Numeric 

8

Interchange 

Definition: Determines whether or not the crash involved an interchange. An interchange is an area 
around a grade separation that involves at least two trafficways. Included within its boundaries are: 

(1) all ramps that connect the roadways, and (2) each roadway entering or leaving the interchange to 
a point 30 meters (100 feet) beyond the gore or curb return at the outermost ramp connection for the 
roadway. Included within an interchange area are intersections, driveway accesses, and roadway 
sections that are non-junction. 
N Prcnt Code Label 
1,903 83.3 0 No 
378 16.5 1 Yes 
3 0.1 9 Unknown 

Format 

Type 

Length

Variable Name 

ML149F 

Numeric 

8

ENVTrafficFlow

Definition: Describes the flow of traffic as specified by the design of the roadway just prior to the 
critical precrash event. 

N 

Prcnt 

Code 

Label
448 19.6 1 Divided trafficway-median strip without positive barrier 
989 43.3 2 Divided trafficway-median strip with positive barrier 
154 6.7 3 One way traffic
662 29.0 4 Not physically divided (two way traffic)

31 1.4 5 Not physically divided with two-way left turn lane 
Format 

Type Length

Variable Name 

ML520F 

Numeric 

8

FlowRestriction 

Definition: Identifies preexisting trafficway flow restrictions that hindered the general flow of traffic in 
some way. Selection of specific attributes does not imply that the restriction contributed to crash 
causation. 

N 

Prcnt 

Code 

Label 
1,824 79.9 0 No restrictions 
152 6.7 1 Work zone 

59 2.6 3 Prior crash
197 8.6 4 Congestion
52 2.3 8 Other (Specify) 
LTCCS Codebook Environment Data Set  126 


Codebook - Environment Data Set 

Format 

Type 

Length

Variable Name 

ML1421F 

Numeric 

8

IntersectionType 

Definition: Defines the intersection type for those crashes that occur in an intersection or are 
intersection-related. For example, if there is a stream of traffic stopped on the approach to an 
intersection and a vehicle at the rear of this traffic stream is struck in the rear by a second vehicle, the 
crash is considered intersection-related and intersection type is coded for this crash. 

N 

Prcnt 

Code 

Label 
1,735 76.0 0 Non-intersection (and not intersection related) 
214 9.4 1 Signalized cross intersection 

14 0.6 2 Cross intersection with right turn lane(s) and stop control on minor street 
29 1.3 3 Cross intersection with left turn lane(s) and stop control on minor street 
16 0.7 4 Cross intersection with left/right turn lane(s) and stop control on minor 
106 4.6 5 Cross intersection with no turning lanes and stop control on minor street 
20 0.9 6 Signalized Tee intersection 
23 1.0 7 Tee intersection with turn lanes and stop control on minor street 
73 3.2 8 Tee intersection with no turn lanes and stop control on minor street 
51 2.2 88 Other (specify) 
3 0.1 99 Unknown 
Format 

Type 

Length

Variable Name 

ML275F 

Numeric 

8

TravelLanes 

Definition: Establishes the number of travel lanes that existed for this vehicle prior to the critical 
precrash event. The attribute related to this variable is determined from the same roadway that was 
used to determine the variable Trafficway Flow. If traffic flows in both directions and is undivided, 
the number of lanes in both directions is indicated. If the trafficway is divided into two or more 
roadways, only the number of lanes for the roadway on which this vehicle was traveling is indicated. 
If turn bays, acceleration, deceleration, or center two-way left turn lanes exist and are physically 
located within the cross section of the roadway and these lanes are the most representative of the 
drivers environment just prior to the critical precrash event, then they are included in the number of 
lanes. 

N 

Prcnt 

Code 

Label 

65 2.8 1 One
817 35.8 2 Two
498 21.8 3 Three
508 22.2 4 Four
280 12.3 5 Five
89 3.9 6 Six 
25 1.1 7 Seven or more 
2 0.1 9 Unknown 
LTCCS Codebook Environment Data Set  127 


Codebook - Environment Data Set 

Format 

Type 

Length

Variable Name 

ML522F 

Numeric 

8

AccessControl 

Definition: Describes the level of control maintained for vehicles attempting to enter/exit the 
roadway. The attribute is determined for the same roadway as described in the variable Number Of 

Travel Lanes. 
N Prcnt Code Label 
1,393 61.0 1 Full control 
890 39.0 2 No control 
1 0.0 3 Other (Specify) 

Variable Name 

Format 

Type 

Length 

ML523F 

Numeric 

8

Signage 

Definition: Describes the general class of roadway by noting the type of route signing. The attribute 
is determined for the same roadway described in the variable Number Of Travel Lanes. 

N 

Prcnt 

Code 

Label 

1,156 50.6 1 Interstate 
216 9.5 2 U.S. highway 
425 18.6 3 State highway 
170 7.4 4 County road 

50 2.2 5 Township
247 10.8 6 Municipality
7 0.3 7 Frontage road 
13 0.6 8 Other (Specify) 
Variable Name 

Format 

Type 

Length 

ML524F 

Numeric 

8

FunctionalClass 

Definition: This variable is based upon the Federal Highway Administrations classification system 
for identifying a roadway functional system. The basic functional systems are: (1) rural areas, (2) 
urbanized areas, and (3) small urban areas (under 50,000 in population). Each system is comprised 
of various functional categories. 

N 

Prcnt 

Code 

Label
236 10.3 1 Rural principal arterial -Interstate
186 8.1 2 Rural principal arterial -other
133 5.8 3 Rural minor arterial

65 2.8 4 Rural major collector 
57 2.5 5 Rural minor collector 
65 2.8 6 Rural local 
14 0.6 7 Rural unknown
921 40.3 8 Urban principal arterial -Interstate
160 7.0 9 Urban principal arterial -Freeways and Expressways 
LTCCS Codebook Environment Data Set  128 


Codebook - Environment Data Set 

N 

Prcnt 

Code 

Label 
194 8.5 10 Urban principal arterial -other 

97 4.2 11 Urban minor arterial 
44 1.9 12 Urban collector 
104 4.6 13 Urban local 
8 0.4 99 Unknown 
Format 

Type 

Length

Variable Name 

ML154F 

Numeric 

8

Daylight 

Definition: Establishes the light conditions of the roadway at the time of the crash and respresents 
both ambient and artificial sources of light. 

N 

Prcnt 

Code 

Label 

1,701 74.5 1 Daylight 

225 9.9 2 Dark 

256 11.2 3 Dark, but lighted 

84 3.7 4 Dawn 
18 0.8 5 Dusk 
Variable Name 

Format 

Type 

Length 

ML2771F 

Numeric 

8

TrafficControl 

Definition: Documents the above-ground traffic control(s) that regulate vehicular traffic in the 
vehicles environment just prior to this vehicles critical precrash event. The attribute is determined for 
the same roadway that is used to define the variable Trafficway Flow. 

N 

Prcnt 

Code 

Label 

1,699 74.4 0 No Control Devices 

122 5.3 1 Control signal (on colors) w/pedestrian signal 

124 5.4 2 Control signal (on colors) w/o pedestrian signal 

6 0.3 3 Control signal (on colors) unknown pedestrian signal 
24 1.1 4 Flashing control signal 
5 0.2 5 Flashing beacon 
1 0.0 6 Flashing highway signal, unknown or other 
10 0.4 7 Lane use control signal 
4 0.2 8 Other highway signal 
74 3.2 20 Stop sign 
7 0.3 21 Yield sign 
41 1.8 22 Other regulatory sign 
1 0.0 31 School advance or crossing sign
108 4.7 40 Warning sign
10 0.4 50 Office, crossing guard, flagman, etc 
5 0.2 60 Gates (active) 
2 0.1 61 Flashing lights (active) 
LTCCS Codebook Environment Data Set  129 


Codebook - Environment Data Set 

N 

Prcnt 

Code 

Label 

5 0.2 70 Cross-bucks (passive) 
33 1.4 98 Other (specify) 
3 0.1 99 Unknown 
Variable Name 

Format 

Type 

Length 

OT23F 

Numeric 

8

Railroad 

Definition: Establishes whether or not a railroad-crossing device was present at the time of the 
crash. 

N 

Prcnt 

Code 

Label 
2,236 97.9 0 No 

12 0.5 1 Yes 
36 1.6 2 Unknown 
Variable Name 

Format 

Type 

Length 

ML276F 

Numeric 

8

Functioning 

Definition: Establishes whether or not the traffic control device that was identified in the variable 
Traffic Control Device was functioning properly (as it was designed to function). 

N 

Prcnt 

Code 

Label 
1,668 73.0 0 No traffic control device 

6 0.3 1 Traffic control device not functioning (specify)
550 24.1 2 Traffic control device functioning properly
60 2.6 9 Unknown 
Format 

Type 

Length

Variable Name 

ML1434F 

Numeric 

8

RoadwayClass 

Definition: Designates the class of roadway within rural and urban categories. The urban 
designation includes urbanized and small urban areas (under 50,000 in population). In general, the 
freeways designation includes freeways, expressways, thruways, and other controlled-access 
roadway segments. 

N 

Prcnt 

Code 

Label
105 4.6 1 Rural Freeway (> 4 lanes)
172 7.5 2 Rural Freeway (<= 4 lanes)

81 3.5 3 Rural multi-lane divided, non-Freeway 
87 3.8 4 Rural multi-lane undivided, non-Freeway
306 13.4 5 Rural two-lane road
6 0.3 6 Rural unknown
871 38.1 7 Urban Freeway (> 4 lanes)
214 9.4 8 Urban Freeway (<= 4 lanes)
152 6.7 9 Urban multi-lane divided, non-Freeway
LTCCS Codebook Environment Data Set  130 


Codebook - Environment Data Set 

N Prcnt Code Label 
146 6.4 10 Urban multi-lane undivided, non-Freeway 
140 6.1 11 Urban two-lane road 
3 0.1 12 Urban unknown 
1 0.0 99 Unknown 
Variable Name Format Type Length 
RoadAlignment ML206F Numeric 8 

Definition: Describes the alignment of the roadway just prior to the vehicles critical precrash event. 
This element is determined from the same roadway that was used to determine the variable 

Trafficway Flow. 
N Prcnt Code Label 
1,764 77.2 1 Straight 
291 12.7 2 Curve right 
229 10.0 3 Curve left 

Variable Name 

Format 

Type 

Length 

ML146F 

Numeric 

8

RoadProfile 

Definition: Establishes the grade of the roadway just prior to the vehicles critical precrash event. To 
determine the grade, the vertical measurement is divided by the horizontal value; the result is a 
percentage value of the grade. This element is determined from the same roadway that was used to 
determine the variable Trafficway Flow. 

N 

Prcnt 

Code 

Label 
1,590 69.6 1 Level 
299 13.1 2 Uphill grade (>2%) 

43 1.9 3 Hill crest
321 14.1 4 Downhill grade (>2%)
10 0.4 5 Sag 
21 0.9 9 Unknown 
Format 

Type 

Length

Variable Name 

ML147F 

Numeric 

8

RoadSurface 

Definition: Describes the surface type of the roadway just prior to the vehicles critical precrash 
event. This element is determined from the same roadway that was used to determine the variable 
Trafficway Flow. 

N Prcnt Code Label 
569 24.9 1 Concrete 
1,706 74.7 2 Bituminous (asphalt) 
3 0.1 4 Slag, gravel, or stone 
1 0.0 5 Dirt 

LTCCS Codebook Environment Data Set  131 


Codebook - Environment Data Set 

N 

Prcnt 

Code 

Label 

3 0.1 8 Other (Specify) 
2 0.1 9 Unknown 
Variable Name 

Format 

Type 

Length 

ML207F 

Numeric 

8

SurfaceCondition 

Definition: Describes the condition of the surface of the roadway just prior to the vehicles critical 
precrash event. This element is determined from the same roadway that was used to determine the 
variable Trafficway Flow. 

N 

Prcnt 

Code 

Label 
1,850 81.0 1 Dry 
361 15.8 2 Wet 

22 1.0 3 Snow or slush 
36 1.6 4 Ice 
15 0.7 8 Other (Specify) 
Variable Name 

Format 

Type 

Length 

ML525F 

Numeric 

8

SurfaceDefect 

Definition: Describes the presence of any surface defects of the roadway just prior to the vehicles 
critical precrash event, regardless of the relative contribution of the defect(s) to crash causation. This 
element is determined from the same roadway that was used to determine the variable Number Of 

Travel Lanes. 
N Prcnt Code Label 
2,273 99.5 0 No defects noted 
11 0.5 1 Defect noted (specify) 

Variable Name 

Format 

Type 

Length 

ML526F 

Numeric 

8

DesignDefect 

Definition: Identifies design deficiencies of the roadway as they relate to established AASHTO 
standards. 

N 

Prcnt 

Code 

Label 
2,225 97.4 0 No deficiencies notes 

3 0.1 1 Inappropriate signage speeds 
1 0.0 2 Insufficient crown 
6 0.3 3 Excessive crown 
1 0.0 4 Insufficient super-elevation 
3 0.1 5 Excessive super-elevation 
19 0.8 6 Excessive curvature 
15 0.7 7 No shoulder/ Breakdown lane 
LTCCS Codebook Environment Data Set  132 


Codebook - Environment Data Set 

N Prcnt Code Label 
8 0.4 8 Other (specify) 
3 0.1 9 Unknown 
Variable Name Format Type Length 
ShoulderType ML1436F Numeric 8 

Definition: Establishes stabilized shoulder presence at the crash site and the type of available 
shoulder surface. A shoulder is defined as that part of a trafficway that is (1) contiguous with the 
roadway for emergency use, (2) for accommodation of stopped road vehicles, and (3) for lateral 
support of the roadway structure. 

N 

Prcnt 

Code 

Label 

551 24.1 0 No stabilized shoulder 

209 9.2 1 Concrete 
1,439 63.0 2 Bituminous (asphalt) 

58 2.5 4 Slag, gravel, or stone 
11 0.5 5 Dirt 
12 0.5 8 Other (specify) 
4 0.2 9 Unknown 
Variable Name 

Format 

Type 

Length 

OT22F 

Numeric 

8

ShoulderWidth 

Definition: Establishes the width of the stabilized shoulder available to this vehicle. To qualify as a 
stabilized shoulder, the measured shoulder width must exceed two feet (0.61 meters). 

N 

Prcnt 

Code 

Label
551 24.1 0 No stabilized shoulder
106 4.6 1 < 1 meter
351 15.4 2 > 1 <= 2 meters
685 30.0 3 > 2 <= 3 meters
521 22.8 4 > 3 meters

70 3.1 9 Unknown 
Variable Name 

Format 

Type 

Length 

ML1435F 

Numeric 

8

RumbleStrip 

Definition: Establishes the presence of a rumble strip, the type of rumble strip, and whether or not 
the rumble strip was involved in the pre-crash circumstances in terms of this vehicle either departing 
or not departing the roadway. 

N Prcnt Code Label 
1,990 87.1 0 No rumble strip present 
14 0.6 1 Raised rumble strip/no pre-crash departure 
2 0.1 2 Raised rumble strip/partial pre-crash departure 

LTCCS Codebook Environment Data Set  133 


Codebook - Environment Data Set 

N 

Prcnt 

Code 

Label 

1 0.0 3 Raised rumble strip/full pre-crash departure 
209 9.2 4 Depressed rumble strip/no pre-crash departure 
27 1.2 5 Depressed rumble strip/partial pre-crash departure 
33 1.4 6 Depressed rumble strip/full pre-crash departure 
8 0.4 9 Unknown 
Format 

Type 

Length

Variable Name 

ML1439F 

Numeric 

8

SightLineRestriction 

Definition: Establishes sight line restrictions for the driver of this vehicle after measuring the sight 
distance and comparing it to AASHTO standards. This determination is based on recommended 
sight distances as established by AASHTO. For safety on a highway, the roadway designer must 
provide sight distance of sufficient length that drivers can control the operation of their vehicle to 
avoid striking an unexpected object on the travel way. 

N Prcnt 

Code 

Label 
2,237 97.9 1 No 

27 1.2 2 Yes (specify) 
20 0.9 9 Unknown 
Format 

Type 

Length

Variable Name 

OT52F 

Numeric 

8

SightLineDistance 

Definition: The measured sight line distance (in meters) represents the distance along the roadway 
that an object of specified height is continuously visible to the driver. This distance is dependent on 
the height of the drivers eye above the road surface, the specified object height above the road 
surface, and the height of sight obstructions within the line of sight. 

N 

Prcnt 

Code 

Label 

1 0.0 15 15 
1 0.0 54 54 
1 0.0 64 64 
2 0.1 78 78 
3 0.1 84 84 
1 0.0 85 85 
3 0.1 120 120 
1 0.0 145 145 
4 0.2 150 150 
1 0.0 160 160 
2 0.1 196 196 
2,237 97.9 8887 No sight line restriction, this vehicle 
20 0.9 9997 Unknown if sight line restricted, this vehicle 
7 0.3 9999 Sight line restriction this vehicle, actual distance not measured. 
LTCCS Codebook Environment Data Set  134 


Codebook - Environment Data Set 

Format 

Type 

Length

Variable Name 

OT51F 

Numeric 

8

AASHTODistance 

Definition: Identifies the AASHTO-recommended sight distance (in meters) for the roadway on 
which the crash occurred. This variable will have a value attached to it when a sight line restriction is 
suspected and the actual sight distance is measured. The sight distance as measured is then 
compared to the recommended sight distance for that situation. 

N 

Prcnt 

Code 

Label 

1 0.0 47 47 

1 0.0 78 78 

1 0.0 82 82 

3 0.1 83 83 

2 0.1 93 93 

1 0.0 109 109 

1 0.0 110 110 

1 0.0 122 122 

1 0.0 130 130 

4 0.2 150 150 

1 0.0 168 168 

2 0.1 174 174 

1 0.0 197 197 

2 0.1 208 208 
2,238 98.0 8887 No sight line restriction, this vehicle 

20 0.9 9997 Unknown if sight line restricted, this vehicle 

4 0.2 9999 Sight line restriction this vehicle, recommended distance 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

ENVNoConditions 

Definition: Documents whether or not there were no adverse atmospheric-related driving 
conditions just prior to the critical event. (This variable was originally an attribute choice under the 
variable Atmospheric Conditions.) 

N 

Prcnt 

Code 

Label 
358 15.7 0 Absent 
1,926 84.3 1 Present 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

ENVRain 

Definition: Documents whether or not it was raining just prior to the critical event. (This variable was 
originally an attribute choice under the variable Atmospheric Conditions.) 

N 

Prcnt 

Code 

Label 
2,029 88.8 0 Absent 
255 11.2 1 Present 

LTCCS Codebook Environment Data Set  135 


Codebook - Environment Data Set 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

ENVSnow

Definition: Documents whether or not it was snowing just prior to the critical event. (This variable 
was originally an attribute choice under the variable Atmospheric Conditions.) 

N Prcnt Code Label 
2,242 98.2 0 Absent 
42 1.8 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

ENVFog 

Definition: Documents whether or not fog was present just prior to the critical event. (This variable 
was originally an attribute choice under the variable Atmospheric Conditions.) 

N Prcnt Code Label 
2,243 98.2 0 Absent 
41 1.8 1 Present 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

ENVWindGusts 

Definition: Documents whether or not heavy wind gusts were present just prior to the critical event. 
(This variable was originally an attribute choice under the variable Atmospheric Conditions.) 

N Prcnt Code Label 
2,279 99.8 0 Absent 
5 0.2 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

ENVHail 

Definition: Documents whether or not hail was falling just prior to the critical event. (This variable 
was originally an attribute choice under the variable Atmospheric Conditions.) 

N 

Prcnt 

Code 

Label 
2,284 100.0 0 Absent 

LTCCS Codebook Environment Data Set  136 


Codebook - Environment Data Set 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

ENVSleet 

Definition: Documents whether or not sleet (frozen or partially frozen raindrops) was falling just 
prior to the critical event. (This variable was originally an attribute choice under the variable 

Atmospheric Conditions.) 
N Prcnt Code Label 
2,280 99.8 0 Absent 
4 0.2 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

ENVDust 

Definition: Documents whether or not heavy dust (with corresponding limited visibility) was present 
just prior to the critical event. (This variable was originally an attribute choice under the variable 

Atmospheric Conditions.) 
N Prcnt Code Label 
2,284 100.0 0 Absent 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

ENVOtherConditions 

Definition: Documents whether or not there were other adverse atmospheric-related driving 
conditions present just prior to the critical event that were not identified in the other atmospheric 
condition variables. (This variable was originally an attribute choice under the variable Atmospheric 

Conditions.) 
N Prcnt Code Label 
2,265 99.2 0 Absent 
19 0.8 1 Present 

LTCCS Codebook Environment Data Set  137 


Codebook  Events Data Set 

Events Data Set 

The Events data set contains all details that describe the events occurring during the crash. A record 
exists for each crash event. 

The Events data set contains the variables CaseID, PSU, PSUStrat, RATWeight, VehicleNumber 
and EventSequence. EventSequence identifies a particular event in a sequence in the accident. 
CaseID and EventSequence uniquely identify each record in this data set. CaseID and 
EventSequence should be used to merge the Events data set with the CDCCrush data set. CaseID 
and VehicleNumber should be used to merge the Events data set with vehicle level data sets. 

Format 

Type 

Length

Variable Name 

$2 

Char 

2

Stratum 

Definition: Stratum is the letter identifying the CDS sampling classification to which the case is 

assigned. 

N 

Prcnt 

Code 

Label 

45 1.6 * A
143 5.1 * B 
10 0.4 * C 
13 0.5 * D 
6 0.2 * E 
6 0.2 * F 
2 0.1 * G 
2 0.1 * H 
47 1.7 * J 
118 4.2 * K 
2,385 85.9 * S 

Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Format 

Type 

Length

Variable Name 

BEST8 

Numeric 

8

EventSequence 

Definition Identifies a particular event in a sequence of the accident. 

N Prcnt Code Label 
1,070 38.5 1 1 
709 25.5 2 2 
419 15.1 3 3 
231 8.3 4 4 
126 4.5 5 5 
76 2.7 6 6 
47 1.7 7 7 
27 1.0 8 8 
14 0.5 9 9 
11 0.4 10 10 
7 0.3 11 11 

LTCCS Codebook Events Data Set  138 


Codebook  Events Data Set 

N 

Prcnt 

Code 

Label 

5 0.2 12 12 

4 0.1 13 13 

3 0.1 14 14 

2 0.1 15 15 

1 0.0 16 16 

1 0.0 17 17 

1 0.0 18 18 

1 0.0 19 19 

1 0.0 20 20 

1 0.0 21 21 

1 0.0 22 22 

1 0.0 23 23 

1 0.0 24 24 

1 0.0 25 25 

1 0.0 26 26 

1 0.0 27 27 

1 0.0 28 28 

1 0.0 29 29 

1 0.0 30 30 

1 0.0 31 31 

1 0.0 32 32 

1 0.0 33 33 

1 0.0 34 34 

1 0.0 35 35 

1 0.0 36 36 

1 0.0 37 37 

1 0.0 38 38 

1 0.0 39 39 

1 0.0 40 40 

1 0.0 41 41 

Format 

Type 

Length

Variable Name 

ML31F 

Numeric 

8

ClassVehicle 

Definition: Describes the class of vehicle for the first vehicle listed on the Case Form Events tab. 
This represents the same attribute as that found in the General Vehicle Data Set (Class Of Vehicle 
variable) and that found in the Vehicle Exterior Data Set (Class Of Vehicle variable). This 
classification is based on the size of the vehicle. 

N 

Prcnt 

Code 

Label
192 6.9 1 Subcompact/mini (wheelbase < 254 cm)
304 10.9 2 Compact (wheelbase >= 254 but < 265 cm)
295 10.6 3 Intermediate (wheelbase >= 265 but < 278 cm)

LTCCS Codebook Events Data Set  139 


Codebook  Events Data Set 

N 

Prcnt 

Code 

Label 

90 3.2 4 Full Size (wheelbase >= 278 but < 291 cm) 
30 1.1 5 Largest (wheelbase >= 291 cm) 
14 0.5 9 Unknown passenger car size
136 4.9 14 Compact utility vehicle
21 0.8 15 Large utility vehicle ( <= 4,536 kgs GVWR) 
7 0.3 16 Utility station wagon ( <= 4,536 kgs GVWR) 
1 0.0 19 Unknown utility type 
82 3.0 20 Minivan ( <= 4,536 kgs GVWR) 
55 2.0 21 Large van ( <= 4,536 kgs GVWR) 
3 0.1 28 Other van type ( <= 4,536 kgs GVWR) 
1 0.0 29 Unknown van type ( <= 4,536 kgs GVWR) 
91 3.3 30 Compact pickup truck ( <= 4,536 kgs GVWR)
127 4.6 31 Large pickup truck ( <= 4,536 kgs GVWR)
2 0.1 38 Other pickup truck type ( <= 4,536 kgs GVWR) 
9 0.3 45 Other light truck ( <= 4,536 kgs GVWR) 
3 0.1 58 Other bus (>4,536 kgs GVWR)
358 12.9 60 Truck (>4,536 kgs GVWR)
41 1.5 67 Tractor without trailer
901 32.4 68 Tractor-trailer(s)
2 0.1 78 Unknown medium/heavy truck type 
12 0.4 80 Motored cycle 
Format 

Type 

Length

Variable Name 

$OT24F 

Char 

1

DamageArea 

Definition: Describes the general area of damage on the first vehicle.
N 

Prcnt 

Code 

Label 

20 0.7 9 Unknown 
172 6.2 B Back/Bk of unit with cargo area=rear of trailer of straight truck 
1 0.0 C Rear of cab 
9 0.3 D Back (rear of tractor) 
1,216 43.8 F Front 
504 18.1 L Left Side 
168 6.0 N Noncollision 
496 17.9 R Right Side 
149 5.4 T Top 

33 1.2 U Undercarriage 
9 0.3 V Front of cargo area 
LTCCS Codebook Events Data Set  140 


Codebook  Events Data Set 

Format 

Type 

Length

Variable Name 

ML34F 

Numeric 

8

EVEObjectContact 

Definition: Dscribes the object or vehicle that was contacted by each vehicle in the case. 
N 

Prcnt 

Code 

Label
180 6.5 1 Vehicle#1
779 28.1 2 Vehicle#2
252 9.1 3 Vehicle#3

80 2.9 4 Vehicle#4 
40 1.4 5 Vehicle#5 
15 0.5 6 Vehicle#6 
1 0.0 7 Vehicle#7 
5 0.2 8 Vehicle#8 
1 0.0 11 Vehicle#11 
2 0.1 13 Vehicle#13 
2 0.1 14 Vehicle#14 
2 0.1 16 Vehicle#16 
2 0.1 17 Vehicle#17 
2 0.1 18 Vehicle#18 
1 0.0 19 Vehicle#19 
1 0.0 20 Vehicle#20 
1 0.0 23 Vehicle#23 
1 0.0 25 Vehicle#25 
1 0.0 26 Vehicle#26 
2 0.1 27 Vehicle#27 
1 0.0 28 Vehicle#28 
5 0.2 30 Vehicle#30
313 11.3 31 Overturn->rollover(excludes end-over-end)
1 0.0 32 Rollover->end-over-end 
66 2.4 33 Fire or explosion 
67 2.4 34 Jackknife 
19 0.7 35 Other intraunit damage (specify) 
1 0.0 36 Noncollision injury 
15 0.5 38 Other noncollision (specify) 
14 0.5 41 Tree(<= 10 cm in diameter) 
44 1.6 42 Tree(> 10 cm in diameter) 
9 0.3 43 Shrubbery or bush 
23 0.8 44 Embankment 
24 0.9 45 Breakaway pole or post (any diameter) 
34 1.2 50 Nonbreakaway pole or post (<=10cm in diameter) 
38 1.4 51 Nonbreakaway pole or post(>10 cm but <= 30 cm in diameter) 
13 0.5 52 Nonbreakaway pole or post(>30 cm in diameter) 
LTCCS Codebook Events Data Set  141 


Codebook  Events Data Set 

N 

Prcnt 

Code 

Label 

6 0.2 53 Nonbreakaway pole or post(diameter unknown) 
195 7.0 54 Concrete traffic barrier 
6 0.2 55 Impact attenuator 
163 5.9 56 Other traffic barrier(includes guardrail) (specify) 
31 1.1 57 Fence 
20 0.7 58 Wall 
4 0.1 59 Building 
14 0.5 60 Ditch or culvert 
20 0.7 61 Ground 
2 0.1 62 Fire hydrant 
27 1.0 63 Curb 
30 1.1 64 Bridge 
24 0.9 68 Other fixed object (specify) 
1 0.0 69 Unknown fixed object 
23 0.8 70 Pass. car,light truck,van,or other vehicle not in-transport 
1 0.0 71 Medium/heavy truck or bus not in-transport 
39 1.4 72 Pedestrian 
9 0.3 73 Cyclist or cycle 
2 0.1 75 Vehicle occupant 
1 0.0 76 Animal 
8 0.3 77 Train 
4 0.1 78 Trailer, disconnected in transport 
39 1.4 79 Object fell from vehicle in-transport 
26 0.9 88 Other nonfixed object (specify) 
14 0.5 98 Other event (specify) 
11 0.4 99 Unknown event or object 
Variable Name 

Format 

Type 

Length 

ML31F 

Numeric 

8

ClassVehicle2 

Definition: Describes the class of vehicle for the second vehicle listed on the Case Form Events tab 
(if the collision was between two vehicles). This represents the same attribute as that found in the 
General Vehicle Data Set (Class Of Vehicle variable) and that found in the Vehicle Exterior Data 
Set (Class Of Vehicle variable). This classification is based on the size of the vehicle. 

N 

Prcnt 

Code 

Label 
1,401 50.5 0 Not a motor vehicle 

56 2.0 1 Subcompact/mini (wheelbase < 254 cm) 
77 2.8 2 Compact (wheelbase >= 254 but < 265 cm) 
59 2.1 3 Intermediate (wheelbase >= 265 but < 278 cm) 
23 0.8 4 Full Size (wheelbase >= 278 but < 291 cm) 
14 0.5 5 Largest (wheelbase >= 291 cm) 
8 0.3 9 Unknown passenger car size 
LTCCS Codebook Events Data Set  142 


Codebook  Events Data Set 

N 

Prcnt 

Code 

Label 

56 2.0 14 Compact utility vehicle 
6 0.2 15 Large utility vehicle ( <= 4,536 kgs GVWR) 
7 0.3 16 Utility station wagon ( <= 4,536 kgs GVWR) 
28 1.0 20 Minivan ( <= 4,536 kgs GVWR) 
14 0.5 21 Large van ( <= 4,536 kgs GVWR) 
1 0.0 24 Van Based school bus ( <= 4,536 kgs GVWR) 
1 0.0 28 Other van type ( <= 4,536 kgs GVWR) 
18 0.6 30 Compact pickup truck ( <= 4,536 kgs GVWR) 
48 1.7 31 Large pickup truck ( <= 4,536 kgs GVWR) 
1 0.0 39 Unknown pick up truck (<=4,536 kgs GVWR) 
6 0.2 45 Other light truck ( <= 4,536 kgs GVWR) 
1 0.0 48 Unknown light truck type ( <= 4,536 kgs GVWR) 
1 0.0 50 School bus (excludes van based)(>4,536 kgs GVWR) 
4 0.1 58 Other bus (>4,536 kgs GVWR)
254 9.1 60 Truck (>4,536 kgs GVWR)
32 1.2 67 Tractor without trailer
648 23.3 68 Tractor-trailer(s)
4 0.1 78 Unknown medium/heavy truck type 
1 0.0 79 Unknown light/medium/heavy truck type 
5 0.2 80 Motored cycle 
3 0.1 90 Other vehicle 
Format 

Type 

Length

Variable Name 

$OT24F 

Char 

1

DamageArea2 

Definition: Describes the general area of damage on the second vehicle (if the collision was 
between two vehicles). 

N 

Prcnt 

Code 

Label
919 33.1 0 Not a motor vehicle

3 0.1 9 Unknown
389 14.0 B Back/Bk of unit with cargo area=rear of trailer of straight truck
15 0.5 D Back (rear of tractor)
400 14.4 F Front
314 11.3 L Left Side
482 17.4 N Noncollision
213 7.7 R Right Side
14 0.5 T Top 
21 0.8 U Undercarriage 
7 0.3 V Front of cargo area 
LTCCS Codebook Events Data Set  143 


Codebook  FactorAssessment Data Set 

FactorAssessment Data Set 

The FactorAssessment data set contains a variety of data supporting the analysts assessment. It 
focuses particularly on roadway, environment, and vehicle-related factors. One record of this 
information exists for each vehicle. 

The FactorAssessment data set contains the variables CaseID, PSU, PSUStrat, RATWeight, and 
VehicleNumber. CaseID and VehicleNumber uniquely identify each record in this data set and 
should be used to merge the FactorAssessment data set with other vehicle level data sets. 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

NoTraffic 

Definition: Establishes whether or not there are no traffic flow interruption factors relevant to the 
crash. (This variable was originally an attribute choice under the variable Traffic Flow Interruption 

Factors.) 
N Prcnt Code Label 
755 33.1 0 Absent 
1,529 66.9 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

AFTPreviousCrash 

Definition: Establishes whether or not traffic flow at the crash site is interrupted by a previous crash 
located near this site. (This variable was originally an attribute choice under the variable Traffic Flow 

Interruption Factors.) 
N Prcnt Code Label 
2,167 94.9 0 Absent 
117 5.1 1 Present 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

ConstructionZone 

Definition: Establishes whether or not traffic flow at the crash site is interrupted as a result of the 
crash site being located in a construction work zone. (This variable was originally an attribute choice 
under the variable Traffic Flow Interruption Factors.) 

N Prcnt Code Label 
2,084 91.2 0 Absent 
200 8.8 1 Present 

LTCCS Codebook FactorAssessment Data Set  144 


Codebook  FactorAssessment Data Set 

Format 

Type 

LengthVariable Name 

AP1U 

Numeric 

8

EmergencyVehicle 

Definition: Establishes whether or not traffic flow at the crash site is interrupted as a result of an 
emergency vehicle approaching from either direction. (This variable was originally an attribute choice 
under the variable Traffic Flow Interruption Factors.) 

N Prcnt Code Label 
2,270 99.4 0 Absent 
14 0.6 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

RushHour 

Definition: Establishes whether or not traffic flow at the crash site is interrupted as a result of rush 
hour traffic congestion. (This variable was originally an attribute choice under the variable Traffic 

Flow Interruption Factors.) 
N Prcnt Code Label 
2,065 90.4 0 Absent 
219 9.6 1 Present 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

OtherTraffic 

Definition: Establishes whether or not traffic flow at the crash site is interrupted as a result of a 
factor not described in the other traffic flow variables. (This variable was originally an attribute choice 
under the variable Traffic Flow Interruption Factors and was the Other (specify): attribute choice.) 

N Prcnt Code Label 
2,024 88.6 0 Absent 
260 11.4 1 Present 

Variable Name 

Format 

Type 

Length 

$50 

Char 

50

OtherTrafficSpecify

Definition: Documents the specify text that was included where the Other Traffic Flow 
Interruption variable (above) was coded as being present for this driver. 

N 

Prcnt 

Code 

Label 
2,024 88.6 * 

1 0.0 * A bycycle had fallen off of a polce vehicle and wa 
2 0.1 * A surrogate interview with the passenger of vehicl 
3 0.1 * As v3 came to rest, it blocked all 3 travel lanes 
1 0.0 * As v3 came to rest, it blocked all 3 travel lanes. 
4 0.2 * Congested traffic not during rush hour. Unknown r 
LTCCS Codebook FactorAssessment Data Set  145 


Codebook  FactorAssessment Data Set 

N 

Prcnt 

Code 

Label 

2 0.1 * Congested traffic, not during rush hour. Reason f 
1 0.0 * Congested traffic, reason unknown. 
4 0.2 * Congested traffic, unknown reason for the congesti 
3 0.1 * Congested traffic, unknown reason. 
------------------------------
1 0.0 * traffic stopped to allow non-contact vehicle with 
1 0.0 * travelling in a school zone with pedestrians on th 
1 0.0 * truck (V2) created traffic flow interruption 
1 0.0 * truck blocked travel lanes 
1 0.0 * truck blocking travel lanes 
1 0.0 * truck was stopped, blocking sole northbound lane o 
1 0.0 * vehicle in his traffic lane stopped to turn left a 
1 0.0 * vehicle one (police car with lights activated) leg 
2 0.1 * vehicle two was backing into roadway without a fla 
1 0.0 * vehicles stopped in lane 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Variable Name 

Format 

Type 

Length 

AP3U 

Numeric 

8

VehicleDefectCount 

Definition: Documents the total number of vehicle condition-related factors coded to this vehicle. 
N 

Prcnt 

Code 

Label 

1,652 72.3 0 0 
383 16.8 1 1 
107 4.7 2 2 

32 1.4 3 3 
6 0.3 4 4 
1 0.0 6 6 
103 4.5 99 Unknown 
Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

LoadObstructedView

Definition: Establishes whether or not the driver experiences a view obstruction that is related to the 
vehicles load. Typically in this circumstance, the obstruction is related to oversize cargo. Less 
frequently occurring however, is the circumstance where the obstruction is related to improper 
loading of the cargo. Both of these situations are included in this designation. (This variable was 
originally an attribute choice under the variable Vehicle Condition Related Factors.) 

N 

Prcnt 

Code 

Label 
2,284 100.0 0 Absent 

LTCCS Codebook FactorAssessment Data Set  146 


Codebook  FactorAssessment Data Set 

Format 

Type 

LengthVariable Name 

AP1U 

Numeric 

8

DesignedObstructedView

Definition: Establishes whether or not the driver experiences a view obstruction that is related to 
vehicle design (e.g. view blocked by upper A-pillar). (This variable was originally an attribute choice 
under the variable Vehicle Condition Related Factors.) 

N Prcnt Code Label 
2,272 99.5 0 Absent 
12 0.5 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

OtherViewObstruction 

Definition: Establishes whether or not the driver experiences a view obstruction that is related to a 
factor not described in the other view obstruction variables. (This variable was originally an attribute 
choice under the variable Vehicle Condition Related Factors.) 

N Prcnt Code Label 
2,274 99.6 0 Absent 
10 0.4 1 Present 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

TireFailure 

Definition: Establishes whether or not the vehicle experiences a tire malfunction (e.g. blowout, 
airout, etc.) during the precrash phase. (This variable was originally an attribute choice under the 
variable Vehicle Condition Related Factors.) 

N Prcnt Code Label 
2,264 99.1 0 Absent 
20 0.9 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

BrakeFailure 

Definition: Establishes whether or not the vehicle experiences a braking system malfunction during 
the precrash phase. NOTE: Degraded braking performance (i.e. out-of-adjustment) is coded under 
the Brakes Out-Of-Adjustment variable. (This variable was originally an attribute choice under the 
variable Vehicle Condition Related Factors.) 

N Prcnt Code Label 
2,272 99.5 0 Absent 
12 0.5 1 Present 

LTCCS Codebook FactorAssessment Data Set  147 


Codebook  FactorAssessment Data Set 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

TransmissionFailure 

Definition: Establishes whether or not the vehicle experiences a transmission malfunction during 
the precrash phase. (This variable was originally an attribute choice under the variable Vehicle 

Condition Related Factors.) 
N Prcnt Code Label 
2,257 98.8 0 Absent 
27 1.2 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

EngineProblem 

Definition: Establishes whether or not the vehicle experiences an engine-related problem during 
the precrash phase. Examples of engine-related problems include stalling, missing, and throttle 
problems. (This variable was originally an attribute choice under the variable Vehicle Condition 

Related Factors.) 
N Prcnt Code Label 
2,276 99.6 0 Absent 
8 0.4 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

OtherDefect 

Definition: Establishes whether or not the vehicle experiences a problem/exhibits a condition during 
the precrash phase that is relevant to crash occurrence, but is not described by other vehicle 
condition variables. (This variable was originally an attribute choice under the variable Vehicle 
Condition Related Factors and was the Other (specify): attribute choice.) 

N 

Prcnt 

Code 

Label 
2,271 99.4 0 Absent 

13 0.6 1 Present 
Format 

Type 

Length

Variable Name 

$50 

Char 

50

OtherDefectSpecify

Definition: Documents the specify text that was included where the Other Vehicle Condition 
variable (above) was coded as being present for this driver.

N 

Prcnt 

Code 

Label 
2,271 99.4 * 

1 0.0 * Driver had stopped to find the source of a dash li 
1 0.0 * Driver said he was going slow (7-10 MPH) to save h 
1 0.0 * Intersecting cracks in windshield 
1 0.0 * Per driver, the speedometer not working. 
LTCCS Codebook FactorAssessment Data Set  148 


Codebook  FactorAssessment Data Set 

N 

Prcnt 

Code 

Label 

1 0.0 * Valve operating the dump trailer became engaged. 
1 0.0 * Vehicle decelerated on interstate for an unknown m 
1 0.0 * air conditioner not working 
1 0.0 * airline rubbing on deck between tractor and traile 
1 0.0 * hood flew up; caused previous crash 
1 0.0 * hood latch failure 
1 0.0 * out of gas 
1 0.0 * tailgate not securred 
1 0.0 * trailer damaged, top piece loose 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

TireDeficiency

Definition: Establishes whether or not the vehicle had a tire deficiency prior to the crash event (e.g. 
low tread depth on one or more tires). 

N 

Prcnt 

Code 

Label
2,213 96.9 0 Absent

71 3.1 1 Present 
Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

BrakesOutOfAdjustment 

Definition: Establishes whether or not any of the vehicles brakes were out-of-adjustment during the 
precrash phase. This variable applies only to heavy trucks. 

N Prcnt Code Label 
2,060 90.2 0 Absent 
224 9.8 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

BrakesInoperative 

Definition: Establishes whether or not any of the vehicles brakes were inoperative during the 
precrash phase. This variable applies only to heavy trucks. 

N Prcnt Code Label 
2,258 98.9 0 Absent 
26 1.1 1 Present 

LTCCS Codebook FactorAssessment Data Set  149 


Codebook  FactorAssessment Data Set 

Format 

Type 

LengthVariable Name 

AP1U 

Numeric 

8 

Definition: Establishes whether or not there were any braking system deficiencies prior to the crash 
that are not described in the other braking variables. 

BrakesSystemDeficiency

N Prcnt Code Label 
2,145 93.9 0 Absent 
139 6.1 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

VehicleOverweight 

Definition: Establishes whether or not the vehicle was overweight prior to the precrash phase. This 
variable applies to heavy trucks only, and has to do with local ordinances as they relate to a trucks 
GVWR (gross vehicle weight rating). 

N Prcnt Code Label 
2,246 98.3 0 Absent 
38 1.7 1 Present 

Format 

Type 

LengthVariable Name 

AP1U 

Numeric 

8

VehicleLightingDeficiency

Definition: Establishes whether or not the vehicle had a lighting system deficiency during the 
precrash phase (e.g. a turn signal or headlight out). 

N 

Prcnt 

Code 

Label 
2,245 98.3 0 Absent 

39 1.7 1 Present 
Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

CargoLoadSecurement 

Definition: Establishes whether or not the vehicles cargo was improperly secured prior to the crash 

event. 
N Prcnt Code Label 
2,254 98.7 0 Absent 
30 1.3 1 Present 

LTCCS Codebook FactorAssessment Data Set  150 


Codebook  FactorAssessment Data Set 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8 
Definition: Establishes whether or not the vehicle had a suspension or frame deficiency prior to the 

SuspensionFrameDeficiency

crash event. 
N Prcnt Code Label 
2,264 99.1 0 Absent 
20 0.9 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

TowingUnitProblem 

Definition: Establishes whether or not the there was a problem with the towing unit of an articulated 
vehicle (this variable usually applies only to trucks). 

N Prcnt 

Code 

Label 
2,273 99.5 0 Absent 

11 0.5 1 Present 
Format 

Type 

LengthVariable Name 

AP1U 

Numeric 

8

ReflectiveTapeMissingObscured

Definition: Establishes whether or not the vehicles reflective tape was missing or obscured in some 
manner. This variable only applies to heavy trucks and has to do with FMCSA reflective tape 

requirements. 
N Prcnt Code Label 
2,277 99.7 0 Absent 
7 0.3 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

FuelSystemProblem 

Definition: Establishes whether or not the vehicle experienced a problem that is related to its fuel 
system during the precrash phase. 

N Prcnt Code Label 
2,280 99.8 0 Absent 
4 0.2 1 Present 

LTCCS Codebook FactorAssessment Data Set  151 


Codebook  FactorAssessment Data Set 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

ExhaustLeak 

Definition: Establishes whether or not the vehicle experienced an exhaust leak during the precrash 

phase. 
N Prcnt Code Label 
2,277 99.7 0 Absent 
7 0.3 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

SteeringWheelProblem 

Definition: Establishes whether or not the vehicle experienced a steering-related problem during 

the precrash phase. 
N Prcnt Code Label 
2,276 99.6 0 Absent 
8 0.4 1 Present 

Format 

Type 

Length

Variable Name 

OT21F 

Numeric 

8

MedianWidth 

Definition: Documents the measured median width (in meters) when a roadway geometry factor 
has been identified involving a crossover. This value is provided when the Roadway Geometry 
variable is coded as being present. 

N Prcnt Code Label 
7 0.3 8887 Not applicable 
2,277 99.7 9999 Unknown 

Variable Name 

Format 

Type 

Length 

OT21F14.1 

Numeric 

8

AFTCurveRadius 

Definition: Documents the measured radius of curvature (in meters) for the roadway on which the 
crash occurred. This value is specified when the Roadway Geometry (Curve) variable is coded as 
being present. 

N 

Prcnt 

Code 

Label 

1 0.0 22.1 22.1 
1 0.0 40.2 40.2 
1 0.0 40.5 40.5 
1 0.0 43 43.0 
2 0.1 54.6 54.6 
1 0.0 57.1 57.1 
1 0.0 63.4 63.4 
LTCCS Codebook FactorAssessment Data Set  152 


Codebook  FactorAssessment Data Set 

N Prcnt Code Label 
1 0.0 71 71.0 
1 0.0 81 81.0 
1 0.0 94 94.0 
1 0.0 94.3 94.3 
1 0.0 94.4 94.4 
2 0.1 102 102.0 
1 0.0 104 104.0 
1 0.0 108 108.0 
1 0.0 112 112.0 
1 0.0 141 141.0 
1 0.0 161 161.0 
1 0.0 187 187.0 
1 0.0 225 225.0 
2 0.1 281 281.0 
3 0.1 300 300.0 
1 0.0 375 375.0 
2,256 98.8 9999 Unknown 
Variable Name Format Type Length 
SightDistance OT21F Numeric 8 

Definition: Documents the measured sight distance in meters when the Road Sight Distance 
Insufficient variable is coded as being present. 

N 

Prcnt 

Code 

Label 

1 0.0 54 54 
1 0.0 70 70 
1 0.0 78 78 
2 0.1 84 84 
1 0.0 85 85 
1 0.0 120 120 
1 0.0 160 160
2,276 99.6 9999 Unknown 
Format 

Type 

Length

Variable Name 

OT21F14.1 

Numeric 

8

AASHTORecommended 

Definition: Documents the AASHTO recommended sight distance in meters for this vehicle in the 
precrash phase. This value is specified when the Road Sight Distance Insufficient variable is coded 
as being present. 

N 

Prcnt 

Code 

Label 

1 0.0 72.2 72.2 
1 0.0 78 78.0 
LTCCS Codebook FactorAssessment Data Set  153 


Codebook  FactorAssessment Data Set 

N 

Prcnt 

Code 

Label 

1 0.0 82 82.0 
1 0.0 83 83.0 
2 0.1 93 93.0 
1 0.0 130 130.0 
1 0.0 168 168.0 
2,276 99.6 9999 Unknown 
Format 

Type 

Length

Variable Name 

AP3U 

Numeric 

8

RoadwayFactorCount 

Definition: Documents the number of roadway-related factors that were coded for this vehicle. 

N 

Prcnt 

Code 

Label 
1,832 80.2 0 0 
395 17.3 1 1 

17 0.7 2 2 
7 0.3 3 3 
1 0.0 4 4 
22 1.0 77 No Driver Present 
10 0.4 99 Unknown 
Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

SignsMissing 

Definition: Documents whether or not traffic signs/signals have been removed from the designated 
location and are not physically present. The removal can be associated with either a repair function 
or vandalism. (This variable was originally an attribute choice under the variable Roadway Related 
Factors.) 

N 

Prcnt 

Code 

Label 
2,265 99.2 0 Absent 

19 0.8 1 Present 
Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

ObjectObscured 

Definition: Documents whether or not there is a view obstruction associated with roadway design 
including such added devices as signal boxes, signal light support poles, guardrails, and crash 
cushions. (This variable was originally an attribute choice under the variable Roadway Related 

Factors.) 
N Prcnt Code Label 
2,281 99.9 0 Absent 
3 0.1 1 Present 

LTCCS Codebook FactorAssessment Data Set  154 


Codebook  FactorAssessment Data Set 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

VehicleObscured 

Definition: Documents whether or not the drivers view is obstructed by an intervening vehicle. (This 
variable was originally an attribute choice under the variable Roadway Related Factors.) 

N Prcnt Code Label 
2,275 99.6 0 Absent 
9 0.4 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

RoadGeometry

Definition: Documents whether or not roadway geometry, usually in the form of a curve, is relevant 
to the crash. (This variable was originally an attribute choice under the variable Roadway Related 

Factors.) 
N Prcnt Code Label 
2,254 98.7 0 Absent 
30 1.3 1 Present 

Format 

Type 

LengthVariable Name 

AP1U 

Numeric 

8

InsufficientSight 

Definition: Documents whether or not the measured sight distance on this roadway does not meet 
the standard as specified in AASHTO. (This variable was originally an attribute choice under the 
variable Roadway Related Factors.) 

N 

Prcnt 

Code 

Label 
2,276 99.6 0 Absent 

8 0.4 1 Present 
Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

BadLaneMarkings 

Definition: Documents whether or not the driver encounters difficulty as a result of lane delineation. 
The delineation markings in this circumstance may not be present, may be worn (i.e. reduced 
visibility), or may be covered in some manner (e.g. gravel, debris, etc.). (This variable was originally 
an attribute choice under the variable Roadway Related Factors.) 

N Prcnt Code Label 
2,274 99.6 0 Absent 
10 0.4 1 Present 

LTCCS Codebook FactorAssessment Data Set  155 


Codebook  FactorAssessment Data Set 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

NarrowShoulders 

Definition: Documents whether or not the driver experiences a problem as a result of the shoulder, 
which is not sufficiently wide. While circumstances will vary depending on location, shoulder width 
should be less than 1.5 meters to qualify for this designation. (This variable was originally an attribute 
choice under the variable Roadway Related Factors.) 

N Prcnt Code Label 
2,279 99.8 0 Absent 
5 0.2 1 Present 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

NarrowRoad 

Definition: Documents whether or not the driver experiences a problem as a result of insufficient 
roadway width. While circumstances will vary depending on the type of roadway, two-lane roadways 
should be less than 20 feet (6.1 meters) in width to qualify for this designation. (This variable was 
originally an attribute choice under the variable Roadway Related Factors.) 

N 

Prcnt 

Code 

Label 
2,284 100.0 0 Absent 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

RampSpeed 

Definition: Documents whether or not the posted ramp entrance/exit speed is inappropriate. This 
includes circumstances where the posted speed is adequate for one class of vehicle, but is too high 
for another class of vehicle (e.g. adequate for automobiles, but too high for large trucks). (This 
variable was originally an attribute choice under the variable Roadway Related Factors.) 

N Prcnt Code Label 
2,280 99.8 0 Absent 
4 0.2 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

PoorCondition 

Definition: Documents whether or not the driver encounters a problem as a result of a roadway 
maintenance condition. Specific areas of concern include potholes, deteriorated/broken road edges, 
washboard areas, and depressions where a localized area of the surface has sunk several inches or 
more. (This variable was originally an attribute choice under the variable Roadway Related 

Factors.) 
N Prcnt Code Label 
2,278 99.7 0 Absent 
6 0.3 1 Present 

LTCCS Codebook FactorAssessment Data Set  156 


Codebook  FactorAssessment Data Set 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

SlickSurface 

Definition: Documents whether or not the driver encounters a low friction surface most commonly 
associated with an icy condition. There are several other circumstances that can be associated with 
a pronounced reduction of friction values. These include loose gravel/sand spread over a paved 
surface and oil build-ups. Typically, wet surfaces are not included in this designation unless moisture 
adds to an existing condition such as an oil build-up. (This variable was originally an attribute choice 
under the variable Roadway Related Factors.) 

N Prcnt Code Label 
2,029 88.8 0 Absent 
255 11.2 1 Present 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

UnderWater 

Definition: Documents whether or not one or more travel lane is completely covered with water. 
(This variable was originally an attribute choice under the variable Roadway Related Factors.) 

N Prcnt Code Label 
2,282 99.9 0 Absent 
2 0.1 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

WashedOut 

Definition: Documents whether or not a portion of the roadway collapses/washes away as a result 
of exposure to running water. (This variable was originally an attribute choice under the variable 

Roadway Related Factors.) 
N Prcnt Code Label 
2,284 100.0 0 Absent 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

OtherProblem 

Definition: Documents whether or not the driver encounters a roadway problem that is not 
described by the other roadway-related variables. (This variable was originally an attribute choice 
under the variable Roadway Related Factors and was the Other (specify): attribute choice.) 

N Prcnt Code Label 
2,181 95.5 0 Absent 
103 4.5 1 Present 

LTCCS Codebook FactorAssessment Data Set  157 


Codebook  FactorAssessment Data Set 

Format 

Type 

Length

Variable Name 

$50 

Char 

50

OtherProblemSpecify

Definition: Documents the specify text that was included where the Other Roadway Related 
Factor variable (above) was coded as being present for this driver. 

N 

Prcnt 

Code 

Label 
2,181 95.5 * 

2 0.1 * A right hand passing lane versus a plain T interse 
1 0.0 * Curve warning sign not posted 
1 0.0 * Debris (piece of metal) lying in roadway 
1 0.0 * Dip in road located at the end of a downhill grade 
3 0.1 * Due to ongoing construction, shoulders were being 
1 0.0 * Flatbed tarp lying in roadway (debris) 
1 0.0 * GRADE. 
1 0.0 * INSUFFICIENT DISTANCE BETWEEN R.R. TRACKS AND 
1 0.0 * Inappropriate speed advisory sign 
3 0.1 * Insufficient median width (10.1-meters) for length 
1 0.0 * Insufficient signage for curve 
1 0.0 * Lack of curve warning signs 
1 0.0 * Lack of overhead street light illumination. 
1 0.0 * Lack of street light illumination 
4 0.2 * Lane drop 
5 0.2 * Lane restriction due to construction. 
1 0.0 * Low hanging utility cable 
2 0.1 * No overhead lighting. 
1 0.0 * No overhead street lights in vicinity of crash. 
1 0.0 * No ramp speed reduction signage 
1 0.0 * No roadway overhead roadway illunination. 
1 0.0 * No signs to indicate the double s-curve 
2 0.1 * POOR ROAD DESIGN IF TRUCKS MUST CROSS 
2 0.1 * Per design standards on rural hi-speed divided hig 
1 0.0 * ROAD VIEW OBSTRUCTION DUE TO CONSTRUCTION 
1 0.0 * Road was in a work zone with cones, missing signs, 
3 0.1 * Road was wet 
1 0.0 * Roadway not illuminated with street lighting, driv 
1 0.0 * Roadway under construction. 
2 0.1 * Roadway was reportedly wet, but it was not raining 
1 0.0 * Roadway was underconstruction with no lane marking 
1 0.0 * Roadway was wet. It is also unknown if sight line 
1 0.0 * There was no improved shoulder adjacent to the rig 
2 0.1 * Though it was daytime, the inside of the tunnel wa 
1 0.0 * Unstabilized and soft shoulder 
1 0.0 * Weed covered fence blocks view of driveway 
LTCCS Codebook FactorAssessment Data Set  158 


Codebook  FactorAssessment Data Set 

N 

Prcnt 

Code 

Label 

2 0.1 * entrance ramp merges from left into fast lane 
2 0.1 * exit ramp located on left 
1 0.0 * flatbed tarp lying in roadway 
1 0.0 * incorrect bridge height sign; lack of "out" once o 
1 0.0 * incorrect bridge height sign; lack of an "out" onc 
2 0.1 * incorrect overpass height sign 
1 0.0 * insufficient distance form railroad track to main 
1 0.0 * insufficient distance from northbound lane to rail 
1 0.0 * insufficient distance from railroad tracks to main 
2 0.1 * left merge into high speed lane 
2 0.1 * narrow bridge 
1 0.0 * negative superelevation. 
1 0.0 * no curve warning signs posted on this ramp. Shoul 
2 0.1 * overhead lights not working 
2 0.1 * road was wet 
1 0.0 * roadway was wet 
2 0.1 * roadway wet with heavy rain 
1 0.0 * short (3-second) left turn arrow 
1 0.0 * sight line distance barely met AASHTO requirement 
1 0.0 * stop sign with crossbucks is insufficient for a TC 
2 0.1 * through lane was snow-covered 
1 0.0 * unstabilized and soft shoulder 
2 0.1 * unusual sequencing of traffic signal 
15 0.7 * wet roadway 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Variable Name 

Format 

Type 

Length 

AP2U 

Numeric 

8

WeatherCount 

Definition: Documents the number of weather related factors that were coded for this vehicle. 
N 

Prcnt 

Code 

Label 
1,922 84.2 0 0 
331 14.5 1 1 

9 0.4 2 2 
22 1.0 7 No Driver Present 
LTCCS Codebook FactorAssessment Data Set  159 


Codebook  FactorAssessment Data Set 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

AFTRain 

Definition: Establishes whether or not it was raining at the time of the crash. (This variable was 
originally an attribute choice under the variable Weather Related Factors.) 

N Prcnt Code Label 
2,040 89.3 0 Absent 
244 10.7 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

AFTSnow

Definition: Establishes whether or not it was snowing at the time of the crash. (This variable was 
originally an attribute choice under the variable Weather Related Factors.) 

N Prcnt Code Label 
2,250 98.5 0 Absent 
34 1.5 1 Present 

Format 

Type 

LengthVariable Name 

AP1U 

Numeric 

8

AFTFog 

Definition: Establishes whether or not the driver was operating in fog at the time of the crash. (This 
variable was originally an attribute choice under the variable Weather Related Factors.) 

N 

Prcnt 

Code 

Label 
2,242 98.2 0 Absent 

42 1.8 1 Present 
Format 

Type 

LengthVariable Name 

AP1U 

Numeric 

8

WindGust 

Definition: Establishes whether or not a wind gust occurs prior to the crash and has some relevance 
to the crash. (This variable was originally an attribute choice under the variable Weather Related 

Factors.) 
N Prcnt Code Label 
2,278 99.7 0 Absent 
6 0.3 1 Present 

LTCCS Codebook FactorAssessment Data Set  160 


Codebook  FactorAssessment Data Set 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

AFTHail 

Definition: Establishes whether or not the driver was operating in hail at the time of the crash. (This 
variable was originally an attribute choice under the variable Weather Related Factors.) 

N 

Prcnt 

Code 

Label 
2,284 100.0 0 Absent 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

AFTSleet 

Definition: Establishes whether or not the driver was operating in sleet at the time of the crash. (This 
variable was originally an attribute choice under the variable Weather Related Factors.) 

N Prcnt Code Label 
2,274 99.6 0 Absent 
10 0.4 1 Present 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

OtherWeather 

Definition: Establishes whether or not there is a relevant weather related factor that is not described 
in the other weather variables. (This variable was originally an attribute choice under the variable 
Weather Related Factors and was the Other (specify): attribute choice.) 

N Prcnt Code Label 
2,271 99.4 0 Absent 
13 0.6 1 Present 

Variable Name 

Format 

Type 

Length 

$50 

Char 

50

OtherWeatherSpecify

Definition: Documents the specify text that was included where the Other Weather Related 
Factor variable (above) was coded as being present for this driver. 

N 

Prcnt 

Code 

Label 
2,271 99.4 * 

1 0.0 * It was cloudy outside and the roadway was wet from 
1 0.0 * Misting and roadway wet from prior rain. 
1 0.0 * Temperature at 30 degrees could have been causing 
2 0.1 * There was a prior hail storm that caused the roads 
1 0.0 * Windy conditions 
1 0.0 * misting and road wet from prior rain. 
LTCCS Codebook FactorAssessment Data Set  161 


Codebook  FactorAssessment Data Set 

N 

Prcnt 

Code 

Label 

4 0.2 * rain-soaked roadway 
2 0.1 * temperature at 30 degrees could have been causing 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Variable Name 

Format 

Type 

Length 

AP2U 

Numeric 

8

EnvironmentCount 

Definition: Documents the number of environmental factors that were coded for this vehicle. 

N Prcnt Code Label 
2,264 99.1 0 0 
15 0.7 1 1 
5 0.2 9 Unknown 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

Glare 

Definition: Establishes whether or not glare in some form is relevant to the crash for this driver. 
Examples include headlight glare, sun glare, and reflected glare (i.e. sun reflecting off a windshield or 
other metal component). (This variable was originally an attribute choice under the variable Other 

Environmental Factors.) 
N Prcnt Code Label 
2,271 99.4 0 Absent 
13 0.6 1 Present 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

BlowingDebris 

Definition: Establishes whether or not this driver is exposed to some form of blowing debris. 
Examples include paper, cardboard boxes, and tree limbs. (This variable was originally an attribute 
choice under the variable Other Environmental Factors.) 

N 

Prcnt 

Code 

Label 
2,284 100.0 0 Absent 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

Smoke 

Definition: Establishes whether or not the drivers view is obscured by the presence of smoke (e.g. 
smoke from a grass fire, house fire, or forest fire). (This variable was originally an attribute choice 
under the variable Other Environmental Factors.) 

N 

Prcnt 

Code 

Label 
2,284 100.0 0 Absent 

LTCCS Codebook FactorAssessment Data Set  162 


Codebook  FactorAssessment Data Set 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

AFTNoDriver 

Definition: Establishes whether or not there was no driver in the drivers seated position at the time 
of the crash. (This variable was originally an attribute choice under the variable Weather Related 

Factors.) 
N Prcnt Code Label 
2,284 100.0 0 Absent 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

OtherChangeSpecify

Definition: Establishes whether or not the driver experiences a problem as a result of a sudden 
change in ambience. (This variable was originally an attribute choice under the variable Other 
Environmental Factors and was the Other Sudden Change In Ambience (specify): attribute 

choice.) 
N Prcnt Code Label 
2,282 99.9 0 Absent 
2 0.1 1 Present 

LTCCS Codebook FactorAssessment Data Set  163 


Codebook  GeneralVehicle Data Set 

GeneralVehicle Data Set 

The GeneralVehicle data set contains general information about the vehicle. This material is 
provided as one record per vehicle. 

The GeneralVehicle data set contains the variables CaseID, PSU, PSUStrat, RATWeight, and 
VehicleNumber. CaseID and VehicleNumber uniquely identify each record in this data set and 
should be used to merge the GeneralVehicle data set with other vehicle level data sets. 

Format 

Type 

Length

Variable Name 

ML241F 

Numeric 

8

GVEMake 

Definition: Identifies the vehicle make for this vehicle. 
N 

Prcnt 

Code 

Label 

18 0.8 2 JEEP / KAISER-JEEP 
11 0.5 6 CHRYSLER 
64 2.8 7 DODGE 
28 1.2 9 PLYMOUTH 
2 0.1 10 EAGLE
266 11.6 12 FORD
12 0.5 13 LINCOLN 
23 1.0 14 MERCURY 
16 0.7 18 BUICK 
18 0.8 19 CADILLAC
174 7.6 20 CHEVROLET
17 0.7 21 OLDSMOBILE 
29 1.3 22 PONTIAC 
73 3.2 23 GMC 
10 0.4 24 SATURN 
1 0.0 25 GRUMMAN 
10 0.4 30 VOLKSWAGEN 
3 0.1 32 AUDI 
8 0.4 34 BMW 
57 2.5 35 NISSAN / DATSUN 
85 3.7 37 HONDA 
25 1.1 38 ISUZU 
16 0.7 41 MAZDA 
7 0.3 42 MERCEDES BENZ 
2 0.1 47 SAAB 
6 0.3 48 SUBARU 
96 4.2 49 TOYOTA
100 4.4 51 VOLVO
30 1.3 52 MITSUBISHI 
3 0.1 53 SUZUKI 
11 0.5 54 ACURA 
LTCCS Codebook GeneralVehicle Data Set  164 


Codebook  GeneralVehicle Data Set 

N 

Prcnt 

Code 

Label 

13 0.6 55 HYUNDAI 
1 0.0 56 MERKUR 
5 0.2 58 INFINITI 
6 0.3 59 LEXUS 
1 0.0 62 LAND ROVER 
6 0.3 63 KIA 
4 0.2 72 HARLEY-DAVIDSON 
2 0.1 73 KAWASAKI 
1 0.0 79 OTHER MAKE MOTORED CYCLE 
1 0.0 80 BROCKWAY 
319 14.0 82 FREIGHTLINER/WHITE 
177 7.7 84 INTERNATIONAL HARVESTER/NAVISTAR 
154 6.7 85 KENWORTH 
159 7.0 86 MACK 
148 6.5 87 PETERBILT 
54 2.4 98 OTHER MAKE (med/heavy truck/bus or "other") 
12 0.5 99 UNKNOWN MANUFACTURER 
Format 

Type 

Length

Variable Name 

BEST8 

Numeric 

8

GVEModel 

Definition: Identifies the vehicle model for this vehicle. 
N 

Prcnt 

Code 

Label 

14 0.6 1 1 
17 0.7 2 2 
27 1.2 3 3 
6 0.3 4 4 
8 0.4 5 5 
8 0.4 6 6 
7 0.3 7 7 
1 0.0 8 8 
13 0.6 9 9 
3 0.1 10 10 
------------------------------
8 0.4 880 880 
1,062 46.5 881 881 
27 1.2 882 882 
73 3.2 883 883 
5 0.2 884 884 
5 0.2 890 890 
19 0.8 898 898 
LTCCS Codebook GeneralVehicle Data Set  165 


Codebook  GeneralVehicle Data Set 

N 

Prcnt 

Code 

Label 

9 0.4 899 899 

7 0.3 988 988 

2 0.1 998 998 

Variable Name 

Format 

Type 

Length 

OT28F 

Numeric 

8

GVEYear 

Definition: Establishes the model year that the vehicle was manufactured. 
N 

Prcnt 

Code 

Label 

1 0.0 1957 1957 

1 0.0 1967 1967 

1 0.0 1971 1971 

1 0.0 1972 1972 

1 0.0 1973 1973 

3 0.1 1974 1974 

1 0.0 1975 1975 

5 0.2 1976 1976 

2 0.1 1977 1977 

7 0.3 1978 1978 

13 0.6 1979 1979 

5 0.2 1980 1980 

9 0.4 1981 1981 

8 0.4 1982 1982 

13 0.6 1983 1983 

28 1.2 1984 1984 

35 1.5 1985 1985 

31 1.4 1986 1986 

51 2.2 1987 1987 

60 2.6 1988 1988 

85 3.7 1989 1989 

88 3.9 1990 1990 

70 3.1 1991 1991 

89 3.9 1992 1992 

97 4.2 1993 1993
135 5.9 1994 1994
146 6.4 1995 1995
150 6.6 1996 1996
157 6.9 1997 1997
194 8.5 1998 1998
201 8.8 1999 1999
244 10.7 2000 2000

LTCCS Codebook GeneralVehicle Data Set  166 


Codebook  GeneralVehicle Data Set 

N 

Prcnt 

Code 

Label 
171 7.5 2001 2001 

93 4.1 2002 2002 
64 2.8 2003 2003 
9 0.4 2004 2004 
15 0.7 9999 Unknown 
Format 

Type 

Length

Variable Name 

ML281F 

Numeric 

8

GVEBodyType 

Definition: Identifies the body type for this vehicle. 
N 

Prcnt 

Code 

Label 

14 0.6 1 Convertible
124 5.4 2 2-door sedan, hardtop, coupe
40 1.8 3 3-door/2-door hatchback
397 17.4 4 4-door sedan, hardtop
12 0.5 5 5-door/4-door hatchback 
16 0.7 6 Station Wagon 
10 0.4 9 Unknown automobile type
105 4.6 14 Compact utility
18 0.8 15 Large utility 
7 0.3 16 Utility station wagon 
2 0.1 17 3-door coupe 
1 0.0 19 Utility, unknown body type 
65 2.8 20 Minivan 
36 1.6 21 Large van 
1 0.0 24 Van based school bus 
2 0.1 28 Other van type 
2 0.1 29 Unknown van type 
62 2.7 30 Compact pickup 
96 4.2 31 Large pickup 
1 0.0 32 Pickup with slide-in camper 
1 0.0 39 Unknown pickup style light conventional truck type 
7 0.3 40 Cab chassis based 
1 0.0 48 Unknown light truck type 
1 0.0 50 School bus 
6 0.3 58 Other bus type 
3 0.1 60 Step van 
56 2.5 61 Single unit straight truck(4500kg<GVWR<=8850kg) 
52 2.3 62 Single unit straight truck(8850kg<GVWR<=12000kg) 
229 10.0 63 Single unit straight truck (GVWR > 12,000 kgs) 
14 0.6 64 Single unit straight truck (GVWR unknown) 
LTCCS Codebook GeneralVehicle Data Set  167 


Codebook  GeneralVehicle Data Set 

N 

Prcnt 

Code 

Label 

1 0.0 65 Medium/heavy truck based motorhome 
30 1.3 67 Truck-tractor with no cargo trailer 
794 34.8 68 Truck-tractor pulling one trailer 
58 2.5 69 Truck-tractor pulling two or more trailers 
5 0.2 78 Unknown medium/heavy truck type 
1 0.0 79 Unknown truck type (light/medium/heavy) 
11 0.5 80 Motorcycle 
1 0.0 88 Other motored cycle (minibike, motorscooter) 
1 0.0 93 Construction equipment other than trucks 
1 0.0 97 Other vehicle type 
Format 

Type 

Length

Variable Name 

ML31F 

Numeric 

8

GVEVehicleClass 

Definition: Establishes the class of vehicle. This classification is largely based on size. 
N 

Prcnt 

Code 

Label
130 5.7 1 Subcompact/mini (wheelbase < 254 cm)
203 8.9 2 Compact (wheelbase >= 254 but < 265 cm)
185 8.1 3 Intermediate (wheelbase >= 265 but < 278 cm)

56 2.5 4 Full Size (wheelbase >= 278 but < 291 cm) 
30 1.3 5 Largest (wheelbase >= 291 cm) 
11 0.5 9 Unknown passenger car size
105 4.6 14 Compact utility vehicle
18 0.8 15 Large utility vehicle ( <= 4,536 kgs GVWR) 
7 0.3 16 Utility station wagon ( <= 4,536 kgs GVWR) 
1 0.0 19 Unknown utility type 
65 2.8 20 Minivan ( <= 4,536 kgs GVWR) 
36 1.6 21 Large van ( <= 4,536 kgs GVWR) 
1 0.0 24 Van Based school bus ( <= 4,536 kgs GVWR) 
2 0.1 28 Other van type ( <= 4,536 kgs GVWR) 
2 0.1 29 Unknown van type ( <= 4,536 kgs GVWR) 
62 2.7 30 Compact pickup truck ( <= 4,536 kgs GVWR) 
96 4.2 31 Large pickup truck ( <= 4,536 kgs GVWR) 
1 0.0 38 Other pickup truck type ( <= 4,536 kgs GVWR) 
1 0.0 39 Unknown pick up truck (<=4,536 kgs GVWR) 
7 0.3 45 Other light truck ( <= 4,536 kgs GVWR) 
1 0.0 48 Unknown light truck type ( <= 4,536 kgs GVWR) 
1 0.0 50 School bus (excludes van based)(>4,536 kgs GVWR) 
6 0.3 58 Other bus (>4,536 kgs GVWR)
357 15.6 60 Truck (>4,536 kgs GVWR)
30 1.3 67 Tractor without trailer 
LTCCS Codebook GeneralVehicle Data Set  168 


Codebook  GeneralVehicle Data Set 

N 

Prcnt 

Code 

Label 
850 37.2 68 Tractor-trailer(s) 

5 0.2 78 Unknown medium/heavy truck type 

1 0.0 79 Unknown light/medium/heavy truck type 

12 0.5 80 Motored cycle 

2 0.1 90 Other vehicle 

Format 

Type 

Length

Variable Name 

OT29F 

Numeric 

8

GVECurbWeight 

Definition: Establishes the weight in kilograms of the vehicle as specified by the manufacturer. 
N 

Prcnt 

Code 

Label 

1 0.0 349 349 

1 0.0 696 696 

1 0.0 710 710 

1 0.0 820 820 

1 0.0 831 831 

3 0.1 885 885 

1 0.0 890 890 

1 0.0 893 893 

1 0.0 912 912 

1 0.0 921 921 
------------------------------

1 0.0 17010 17010 

1 0.0 17237 17237 

1 0.0 17350 17350 

1 0.0 17950 17950 

1 0.0 18280 18280 

1 0.0 18300 18300 

1 0.0 19573 19573 

1 0.0 19913 19913 

1 0.0 28576 28576
201 8.8 999999 Unknown 

Format 

Type 

Length

Variable Name 

ML282F 

Numeric 

8

GVEWeightSource 

Definition: Establishes the source for the weight of the vehicle as reported in the variable Curb 
Weight. 

N 

Prcnt 

Code 

Label
201 8.8 0 Curb weight unknown

27 1.2 1 AAMA 

LTCCS Codebook GeneralVehicle Data Set  169 


Codebook  GeneralVehicle Data Set 

N 

Prcnt 

Code 

Label
558 24.4 2 Automotive News
204 8.9 3 Branham Automobile Reference Book
139 6.1 4 Gasoline Truck, Import Truck, and Diesel Truck Index 

55 2.4 8 Other (specify) 
1,100 48.2 99 Unknown curb weight source 

Format 

Type 

Length

Variable Name 

OT29F 

Numeric 

8

GVECargoWeight 

Definition: Documents the weight in kilograms of any cargo that is present in the vehicle at the time 
of the crash. This number does not include the weight of any occupants in the vehicle. For CDS 
vehicles that are towing a trailer, this weight represents the weight of the trailer plus its cargo. To 
obtain the cargo weight (only) of cargo being transported by heavy trucks, the variable 
CMBDCargoWeight (Total Cargo Weight) in the TruckExterior Data Set should be used. 

N 

Prcnt 

Code 

Label
919 40.2 0 0 

5 0.2 1 1 

6 0.3 2 2 

1 0.0 3 3 

39 1.7 5 5 

9 0.4 7 7 

26 1.1 9 9 

3 0.1 10 10 

16 0.7 11 11 

1 0.0 13 13 
------------------------------

1 0.0 39009 39009 

1 0.0 39010 39010 

1 0.0 39508 39508 

1 0.0 41822 41822 

1 0.0 43872 43872 

1 0.0 45360 45360 

1 0.0 48988 48988 

1 0.0 49743 49743 

1 0.0 63504 63504
449 19.7 999999 Unknown 

LTCCS Codebook GeneralVehicle Data Set  170 


Codebook  GeneralVehicle Data Set 

Format 

Type 

Length

Variable Name 

ML283F 

Numeric 

8

GVECargoSource 

Definition: Establishes the source from which the value reported in the variable Cargo Weight was 
obtained. 

N 

Prcnt 

Code 

Label
447 19.6 0 Cargo weight unknown
798 34.9 1 Vehicle inspection

72 3.2 2 Interview 
1 0.0 4 Tow Yard Operator 
9 0.4 8 Other (specify)
957 41.9 99 Unknown cargo weight source 
Format 

Type 

Length

Variable Name 

$10 

Char 

10

GVEVIN 

Definition: Identifies the Vehicle Identification Number (VIN) for this vehicle.
N 

Prcnt 

Code 

Label 

1 0.0 * 107294N 
1 0.0 * 10T3R0HT5T 
1 0.0 * 10T3R2LA4E 
1 0.0 * 10T9P1B26H 
1 0.0 * 133671 
1 0.0 * 1582028838 
1 0.0 * 168182S 
1 0.0 * 19UUA566X1 
1 0.0 * 1A9TAC6M6X 
1 0.0 * 1B3AP6436R 
------------------------------
1 0.0 * WVWMA23B4Y 
1 0.0 * WVWRB11G3K 
1 0.0 * YS3CN65M6R 
1 0.0 * YS3DD58B3V 
1 0.0 * YV1AX8842G 
1 0.0 * YV1FX8845K 
1 0.0 * YV1GA8746L 
1 0.0 * YV1LS5574W 
1 0.0 * YV1LS5826V 
1 0.0 * YV1LZ5648W 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

LTCCS Codebook GeneralVehicle Data Set  171 


Codebook  GeneralVehicle Data Set 

Format 

Type 

Length

Variable Name 

ML1326F 

Numeric 

8

GVESpecialUse 

Definition: Establishes any uses for the vehicle outside of personal use.
N 

Prcnt 

Code 

Label 
1,003 43.9 0 No Special Use 

5 0.2 1 Taxi 
2 0.1 2 Vehicle used as a school bus 
5 0.2 5 Police 
2 0.1 6 Ambulance 
4 0.2 9 Unknown 
1,263 55.3 88 Not a light motor vehicle 
Format 

Type 

Length

Variable Name 

ML177F 

Numeric 

8

GVEInspection 

Definition: Documents the type of inspection completed for this vehicle.
N 

Prcnt 

Code 

Label
125 5.5 0 No Inspection

2 0.1 1 Vehicle fully repaired -no damage evident 
626 27.4 2 Partial inspection (specify) 
1,519 66.5 3 Complete Inspection 

12 0.5 8 Non qualifying vehicle 
Variable Name 

Format 

Type 

Length 

$OT32F 

Char 

10

GVEInspectionDate 

Definition: Documents the date that the vehicle was inspected by the researcher. 
N 

Prcnt 

Code 

Label 

44 1.9 * 2001-01-01 
34 1.5 * 2001-02-01 
56 2.5 * 2001-03-01 
59 2.6 * 2001-04-01 
59 2.6 * 2001-05-01 
68 3.0 * 2001-06-01 
52 2.3 * 2001-07-01 
58 2.5 * 2001-08-01 
41 1.8 * 2001-09-01 
81 3.5 * 2001-10-01 
56 2.5 * 2001-11-01 
39 1.7 * 2001-12-01 
67 2.9 * 2002-01-01 
LTCCS Codebook GeneralVehicle Data Set  172 


Codebook  GeneralVehicle Data Set 

N 

Prcnt 

Code 

Label 

67 2.9 * 2002-02-01 
94 4.1 * 2002-03-01 
84 3.7 * 2002-04-01 
72 3.2 * 2002-05-01 
67 2.9 * 2002-06-01 
41 1.8 * 2002-07-01 
68 3.0 * 2002-08-01 
59 2.6 * 2002-09-01 
63 2.8 * 2002-10-01 
88 3.9 * 2002-11-01 
52 2.3 * 2002-12-01 
59 2.6 * 2003-01-01 
55 2.4 * 2003-02-01 
86 3.8 * 2003-03-01 
62 2.7 * 2003-04-01 
62 2.7 * 2003-05-01 
69 3.0 * 2003-06-01 
56 2.5 * 2003-07-01 
45 2.0 * 2003-08-01 
30 1.3 * 2003-09-01 
59 2.6 * 2003-10-01 
43 1.9 * 2003-11-01 
48 2.1 * 2003-12-01 
3 0.1 * 2004-01-01 
1 0.0 * 2004-05-01 
12 0.5 7777-77-77 Not qualifying vehicle
125 5.5 8888-88-88 Not inspected 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Variable Name 

Format 

Type 

Length 

ML196F 

Numeric 

8

GVEPARSevCode 

Definition: Documents the highest injury severity code in the vehicle, as reported by police on the 
Police Accident Report (PAR). 

N 

Prcnt 

Code 

Label
886 38.8 0 O -No injury
296 13.0 1 C -Possible injury
430 18.8 2 B -Non-incapacitating injury
365 16.0 3 A -Incapacitating injury
214 9.4 4 K -Killed

11 0.5 5 U -Injury, severity unknown 
LTCCS Codebook GeneralVehicle Data Set  173 


Codebook  GeneralVehicle Data Set 

N 

Prcnt 

Code 

Label 

3 0.1 6 Died prior to crash 
79 3.5 9 Unknown 
Variable Name 

Format 

Type 

Length 

ML196F 

Numeric 

8

GVERESSevCode 

Definition: Documents the highest injury severity code in the vehicle, as determined by injury 
coding and case narratives. This code is based on information obtained from medical records and/or 
case narratives and may differ from the police-reported injury severity code. 

N 

Prcnt 

Code 

Label
878 38.4 0 O -No injury

40 1.8 1 C -Possible injury
754 33.0 2 B -Non-incapacitating injury
320 14.0 3 A -Incapacitating injury
221 9.7 4 K -Killed
66 2.9 5 U -Injury, severity unknown 
5 0.2 6 Died prior to crash 
Variable Name 

Format 

Type 

Length 

$OT31F 

Char 

10

VINMake 

Definition: Created by running the vehicles Vehicle Identification Number (VIN) through the 
PCVINA computer program. 

N 

Prcnt 

Code 

Label
162 7.1 999999999 Unknown

10 0.4 * ACUR 
1 0.0 * AMER 
3 0.1 * AUDI 
1 0.0 * AUTO 
7 0.3 * BMW 
16 0.7 * BUIC 
17 0.7 * CADI
152 6.7 * CHEV
12 0.5 * CHRY 
1 0.0 * DATS 
61 2.7 * DODG 
2 0.1 * EGIL
245 10.7 * FORD
308 13.5 * FRHT
10 0.4 * GEO 
55 2.4 * GMC 
4 0.2 * HD 
LTCCS Codebook GeneralVehicle Data Set  174 


Codebook  GeneralVehicle Data Set 

N 

Prcnt 

Code 

Label 

1 0.0 * HINO 
78 3.4 * HOND 
13 0.6 * HYUN 
4 0.2 * INFI
169 7.4 * INTL
25 1.1 * ISU 
17 0.7 * JEEP 
2 0.1 * KAWK 
5 0.2 * KIA
147 6.4 * KW
6 0.3 * LEXS 
12 0.5 * LINC 
1 0.0 * LNDR
146 6.4 * MACK
15 0.7 * MAZD 
22 1.0 * MERC 
1 0.0 * MERK 
7 0.3 * MERZ 
28 1.2 * MITS 
51 2.2 * NISS 
16 0.7 * OLDS 
3 0.1 * OSHK 
28 1.2 * PLYM 
28 1.2 * PONT
137 6.0 * PTRB
2 0.1 * SAA 
16 0.7 * STRG 
10 0.4 * STRN 
6 0.3 * SUBA 
2 0.1 * SUZI 
84 3.7 * TOYT 
8 0.4 * VOLK 
75 3.3 * VOLV 
34 1.5 * WHGM 
5 0.2 * WHIT 
13 0.6 * WSTR 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

LTCCS Codebook GeneralVehicle Data Set  175 


Codebook  GeneralVehicle Data Set 

Format 

Type 

Length

Variable Name 

$OT31F 

Char 

10

VINModel 

Definition: Created by running the vehicles Vehicle Identification Number (VIN) through the 

PCVINA computer program. 

N 

Prcnt 

Code 

Label 

1 0.0 * 19E 
2 0.1 * 200 
7 0.3 * 20S 
1 0.0 * 240 
1 0.0 * 250 
1 0.0 * 28S 
1 0.0 * 2SE 
1 0.0 * 2SS 
1 0.0 * 3/5 
1 0.0 * 30C 
------------------------------
4 0.2 * WIN 
1 0.0 * XGU 
1 0.0 * XGX 
2 0.1 * XLE 
7 0.3 * XPD 
1 0.0 * XR4 
2 0.1 * Z28 
1 0.0 * Z9B 
2 0.1 * ZCH 
2 0.1 * ZXS 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Format 

Type 

Length

Variable Name 

OT28F 

Numeric 

8

VINYear 

Definition: Created by running the vehicles Vehicle Identification Number (VIN) through the 
PCVINA computer program. 

N 

Prcnt 

Code 

Label 

8 0.4 1981 1981 
8 0.4 1982 1982 
11 0.5 1983 1983 
26 1.1 1984 1984 
34 1.5 1985 1985 
31 1.4 1986 1986 
46 2.0 1987 1987 
58 2.5 1988 1988 
LTCCS Codebook GeneralVehicle Data Set  176 


Codebook  GeneralVehicle Data Set 

N 

Prcnt 

Code 

Label 

81 3.5 1989 1989 

83 3.6 1990 1990 

67 2.9 1991 1991 

86 3.8 1992 1992 

94 4.1 1993 1993 
125 5.5 1994 1994 
142 6.2 1995 1995 
147 6.4 1996 1996 
148 6.5 1997 1997 
190 8.3 1998 1998 
197 8.6 1999 1999 
236 10.3 2000 2000 
163 7.1 2001 2001 

88 3.9 2002 2002 

63 2.8 2003 2003 

7 0.3 2004 2004 
145 6.3 9999 Unknown 

Format 

Type 

Length

Variable Name 

$OT66F 

Char 

3

Series 

Definition: Created by running the vehicles Vehicle Identification Number (VIN) through the 
PCVINA computer program. 

N 

Prcnt 

Code 

Label 

5 0.2 * 150 

5 0.2 * 15V 

1 0.0 * 211 

1 0.0 * 22S 

1 0.0 * 237 

3 0.1 * 250 

4 0.2 * 257 

1 0.0 * 25B 

6 0.3 * 25V 

2 0.1 * 267 
------------------------------

21 0.9 * WGM 

24 1.1 * WIA 

3 0.1 * WLX 

2 0.1 * WSD 

1 0.0 * WWG 

2 0.1 * XLL 

3 0.1 * XLS 

LTCCS Codebook GeneralVehicle Data Set  177 


Codebook  GeneralVehicle Data Set 

N 

Prcnt 

Code 

Label 

2 0.1 * XSC 
2 0.1 * XTR 
5 0.2 * XWX 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Variable Name 

Format 

Type 

Length 

$OT31F 

Char 

10

VINBodyType 

Definition: Created by running the vehicles Vehicle Identification Number (VIN) through the 
PCVINA computer program. 

N 

Prcnt 

Code 

Label 

14 0.6 * 2D 
38 1.7 * 2H 
2 0.1 * 2L 
1 0.0 * 2P 
1 0.0 * 2T 
12 0.5 * 2W 
2 0.1 * 3C 
1 0.0 * 3P 
1 0.0 * 4B 
26 1.1 * 4C
370 16.2 * 4D
8 0.4 * 4H 
7 0.3 * 4P 
98 4.3 * 4W
166 7.3 999999999 Unknown
1 0.0 * AC 
2 0.1 * BU 
20 0.9 * CB
122 5.3 * CC
13 0.6 * CG 
2 0.1 * CM 
96 4.2 * CP 
11 0.5 * CV 
9 0.4 * CW 
16 0.7 * DP
712 31.2 * DS
4 0.2 * EC 
16 0.7 * ES 
3 0.1 * FB 
3 0.1 * FC 
3 0.1 * GL 
LTCCS Codebook GeneralVehicle Data Set  178 


Codebook  GeneralVehicle Data Set 

N 

Prcnt 

Code 

Label 

12 0.5 * IC 
3 0.1 * MP 
3 0.1 * MY 
24 1.1 * PC 
80 3.5 * PK 
13 0.6 * PS 
2 0.1 * RD 
9 0.4 * RS 
44 1.9 * SV 
16 0.7 * SW 
33 1.4 * TB 
30 1.3 * TL
217 9.5 * TM
11 0.5 * UT 
4 0.2 * VN 
3 0.1 * YY 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Variable Name 

Format 

Type 

Length 

$40 

Char 

40

Roof1 

Definition: Created by running the vehicles Vehicle Identification Number (VIN) through the 

PCVINA computer program. 

N 

Prcnt 

Code 

Label 

2 0.1 * Manual sun/ moon roof
876 38.4 * None/not available
3 0.1 * Other/unknown 
44 1.9 * Power sun/moon roof 
4 0.2 * Removable panels 
1 0.0 * Removable roof 
1 0.0 * Retractable roof panel
1,353 59.2 * Unknown 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Format 

Type 

Length

Variable Name 

$40 

Char 

40

Roof2 

Definition: Created by running the vehicles Vehicle Identification Number (VIN) through the 
PCVINA computer program. 

N 

Prcnt 

Code 

Label 

66 2.9 * Manual sun/ moon roof 
3 0.1 * None/not available 
4 0.2 * Other/unknown 
LTCCS Codebook GeneralVehicle Data Set  179 


Codebook  GeneralVehicle Data Set 

N 

Prcnt 

Code 

Label
278 12.2 * Power sun/moon roof

10 0.4 * Removable panels 
2 0.1 * Removable roof
1,921 84.1 * Unknown 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Variable Name 

Format 

Type 

Length 

$40 

Char 

40

Roof3 

Definition: Created by running the vehicles Vehicle Identification Number (VIN) through the 

PCVINA computer program. 

N 

Prcnt 

Code 

Label 

3 0.1 * Power sun/moon roof 
2 0.1 * Removable panels
2,279 99.8 * Unknown 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Variable Name 

Format 

Type 

Length 

$OT67F 

Char 

5

FrontWheelDrive 

Definition: Created by running the vehicles Vehicle Identification Number (VIN) through the 
PCVINA computer program.

N 

Prcnt 

Code 

Label 
1,582 69.3 8 Not Applicable/No value returned by PCVINA 
145 6.3 9 Unknown 

93 4.1 N N 
464 20.3 Y Y 
Variable Name 

Format 

Type 

Length 

$OT67F 

Char 

5

FourWheelDrive 

Definition: Created by running the vehicles Vehicle Identification Number (VIN) through the 
PCVINA computer program. 

N 

Prcnt 

Code 

Label 

1 0.0 * * 
1,582 69.3 8 Not Applicable/No value returned by PCVINA 
145 6.3 9 Unknown 
549 24.0 N N 

7 0.3 Y Y 
LTCCS Codebook GeneralVehicle Data Set  180 


Codebook  GeneralVehicle Data Set 

Format 

Type 

Length

Variable Name 

$50 

Char 

50

GVERestraintType 

Definition: Created by running the vehicles Vehicle Identification Number (VIN) through the 
PCVINA computer program. 

N 

Prcnt 

Code 

Label
147 6.4 * Active (manual) belts

78 3.4 * Driver front air bag/passenger side active belt 
6 0.3 * Driver front air bag/passenger side belt unknown 
20 0.9 * Driver front air bag/passenger side passive belt 
36 1.6 * Dual air bag front/active belts w/passenger side d 
7 0.3 * Dual air bags front and side/active belts w/automa 
43 1.9 * Dual air bags front and sides/active belts 
2 0.1 * Dual air bags front, head and sides/active belts 
6 0.3 * Dual air bags front, head, and side/active belts w 
1 0.0 * Dual air bags front, head, and side/active belts/r 
1 0.0 * Dual air bags front/side air bag, driver-side only
317 13.9 * Dual front air bags/active belts
6 0.3 * Dual front air bags/belt system unknown 
1 0.0 * Dual front air bags/passive belts 
67 2.9 * No restraint information available 
77 3.4 * Passive (automatic) belts
1,469 64.3 * Unknown 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Variable Name 

Format 

Type 

Length 

$OT66F 

Char 

3

Carburetion 

Definition: Created by running the vehicles Vehicle Identification Number (VIN) through the 
PCVINA computer program. 

N 

Prcnt 

Code 

Label 

1 0.0 1 1 
17 0.7 2 2 
2 0.1 3 3 
4 0.2 4 4 
1,572 68.8 888 Not Applicable/No value returned by PCVINA 
147 6.4 999 Unknown 
522 22.9 F F 

1 0.0 J J 
1 0.0 S S 
13 0.6 T T 
4 0.2 Z Z 
LTCCS Codebook GeneralVehicle Data Set  181 


Codebook  GeneralVehicle Data Set 

Format 

Type 

Length

Variable Name 

$15 

Char 

15

FuelType 

Definition: Created by running the vehicles Vehicle Identification Number (VIN) through the 
PCVINA computer program. 

N 

Prcnt 

Code 

Label 

1,169 51.2 * Diesel
934 40.9 * Gas
181 7.9 * Unknown 

Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Variable Name 

Format 

Type 

Length 

BEST8 

Numeric 

8

VINWeight 

Definition: Created by running the vehicles Vehicle Identification Number (VIN) through the 
PCVINA computer program. 

N 

Prcnt 

Code 

Label
739 32.4 0 0 
243 10.6 1 1 
132 5.8 2 2 

17 0.7 3 3 
21 0.9 4 4 
3 0.1 5 5 
68 3.0 6 6 
99 4.3 7 7 
962 42.1 8 8 
Format 

Type 

Length

Variable Name 

$20 

Char 

20

VehicleType 

Definition: Created by running the vehicles Vehicle Identification Number (VIN) through the 
PCVINA computer program. 

N 

Prcnt 

Code 

Label 

9 0.4 * Motorcycle
566 24.8 * Passenger Vehicle
1,547 67.7 * Truck
162 7.1 * Unknown 

Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

LTCCS Codebook GeneralVehicle Data Set  182 


Codebook  GeneralVehicle Data Set 

Format 

Type 

Length

Variable Name 

OT25F 

Numeric 

8

WheelConfig 

Definition: Created by running the vehicles Vehicle Identification Number (VIN) through the 

PCVINA computer program. 

N 

Prcnt 

Code 

Label
472 20.7 42 42
152 6.7 44 44

3 0.1 62 62
895 39.2 64 64
1 0.0 66 66 
4 0.2 84 84 
1 0.0 86 86
756 33.1 999 Unknown 
Format 

Type 

Length

Variable Name 

$20 

Char 

20

DayRunningLights 

Definition: Created by running the vehicles Vehicle Identification Number (VIN) through the 

PCVINA computer program. 

N 

Prcnt 

Code 

Label
699 30.6 * Not available

49 2.1 * Optional 
154 6.7 * Standard
1,382 60.5 * Unknown 

Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Format 

Type 

Length

Variable Name 

OT28F 

Numeric 

8

BaseWeight 

Definition: Created by running the vehicles Vehicle Identification Number (VIN) through the 
PCVINA computer program. In kilograms. 

N 

Prcnt 

Code 

Label 

1 0.0 383 383 
1 0.0 397 397 
1 0.0 450 450 
1 0.0 593 593 
1 0.0 598 598 
4 0.2 999 999 
1 0.0 1565 1565 
1 0.0 1830 1830 
1 0.0 1860 1860 
1 0.0 1867 1867 
LTCCS Codebook GeneralVehicle Data Set  183 


Codebook  GeneralVehicle Data Set 

N 

Prcnt 

Code 

Label 
------------------------------

2 0.1 3911 3911 
1 0.0 3948 3948 
1 0.0 3958 3958 
1 0.0 3996 3996 
1 0.0 4001 4001 
1 0.0 4024 4024 
2 0.1 4028 4028 
1 0.0 4128 4128 
1 0.0 4145 4145
1,728 75.7 9999 Unknown 
Variable Name 

Format 

Type Length 

OT30F 

Numeric 

8

GVEMotorcycleDisplacement 

Definition: Created by running the vehicles Vehicle Identification Number (VIN) through the 
PCVINA computer program.

N 

Prcnt 

Code 

Label 

2 0.1 600 600 
1 0.0 700 700 
1 0.0 900 900 
1 0.0 1200 1200 
2 0.1 1340 1340 
1 0.0 1450 1450 
1 0.0 1500 1500 
2,272 99.5 88888887 Not applicable 
3 0.1 99999999 Unknown 
Variable Name 

Format 

Type 

Length 

OT28F 

Numeric 

8

GVETravelSpeed 

Definition: Documents the travel speed (kph) of the vehicle (prior to the crash) as reported by police 
on the Police Accident Report (PAR). 

N 

Prcnt 

Code 

Label
220 9.6 0 0 

1 0.0 5 5 
15 0.7 8 8 
4 0.2 11 11 
2 0.1 13 13 
27 1.2 16 16 
1 0.0 19 19 
1 0.0 20 20 
LTCCS Codebook GeneralVehicle Data Set  184 


Codebook  GeneralVehicle Data Set 

N 

Prcnt 

Code 

Label 

1 0.0 22 22 

1 0.0 23 23 
------------------------------

2 0.1 124 124 

1 0.0 126 126 

5 0.2 129 129 

1 0.0 137 137 

1 0.0 145 145 

1 0.0 153 153 

1 0.0 156 156 

1 0.0 161 161 

1 0.0 177 177 

1 0.0 241 241 
1,406 61.6 9999 Unknown 

Variable Name 

Format 

Type 

Length 

OT28F 

Numeric 

8

GVEPostedSpeed 

Definition: Establishes the posted speed limit in effect for the crash location (kph). 
N 

Prcnt 

Code 

Label 

6 0.3 0 0 

1 0.0 16 16 

4 0.2 24 24 

4 0.2 32 32 

44 1.9 40 40 

58 2.5 48 48
174 7.6 56 56
135 5.9 64 64
278 12.2 72 72
163 7.1 80 80
694 30.4 89 89
236 10.3 97 97
344 15.1 105 105

99 4.3 113 113 

31 1.4 121 121 

13 0.6 9999 Unknown 

LTCCS Codebook GeneralVehicle Data Set  185 


Codebook  GeneralVehicle Data Set 

Variable Name 
DriverPresent 
Format 
ML274F 
Type 
Numeric 
Length 
8 
Definition: Serves as a flag to identify driverless motor vehicles in-transport. 
N Prcnt Code Label 
24 1.1 0 No Driver Present 
2,260 98.9 1 Yes 
Variable Name 
PARAlcoholPresent 
Format 
ML191F 
Type 
Numeric 
Length 
8 

Definition: Establishes whether or not the police report indicates that the driver had consumed an 
alcoholic beverage. Presence is not an indication that alcohol was in any way a cause of the crash, 
even though it might have been. Finding opened or unopened alcoholic beverages in the vehicle 
does not by itself constitute presence. 

N 

Prcnt 

Code 

Label 
1,963 85.9 0 No alcohol present 

67 2.9 1 Yes alcohol present
106 4.6 7 Not reported
24 1.1 8 No driver present
124 5.4 9 Unknown 
Format 

Type 

Length

Variable Name 

ML189F 

Numeric 

8

PARAlcoholTest 

Definition: Establishes whether or not an alcohol test was administered to this driver.
N 

Prcnt 

Code 

Label
534 23.4 0 Test Performed

2 0.1 95 Test Refused 
1,520 66.5 96 None Given
121 5.3 97 BAC test performed, results unknown

24 1.1 98 No driver present 
83 3.6 99 Unknown 
Format 

Type 

Length

Variable Name 

OT28F 

Numeric 

8

PARAlcoholTestResult 

Definition: Reports the results of any analytical alcohol test conducted on the driver. Sources of 
information include the police report, medical records, and other official sources. (In percent times 

100.) 
N Prcnt Code Label 
457 20.0 0 0 
1 0.0 1 1 

LTCCS Codebook GeneralVehicle Data Set  186 


Codebook  GeneralVehicle Data Set 

N 

Prcnt 

Code 

Label 

1 0.0 3 3 
1 0.0 10 10 
1 0.0 15 15 
1 0.0 16 16 
1 0.0 40 40 
1 0.0 60 60 
1 0.0 68 68 
1 0.0 70 70 
------------------------------
1 0.0 282 282 
1 0.0 290 290 
1 0.0 292 292 
2 0.1 320 320 
1 0.0 321 321 
1 0.0 350 350 
1 0.0 362 362 
1 0.0 369 369 
24 1.1 8888 Not applicable 
1,740 76.2 9999 Unknown 
Format 

Type 

Length

Variable Name 

$OT62F 

Char 

10

PARTestDelay

Definition: Documents the time delay between the time of the crash and the administration of an 
alcohol test. 

N 

Prcnt 

Code 

Label 

1 0.0 * 00:25 
1 0.0 * 00:28 
1 0.0 * 00:29 
2 0.1 * 00:30 
1 0.0 * 00:31 
1 0.0 * 00:33 
2 0.1 * 00:36 
1 0.0 * 00:37 
1 0.0 * 00:39 
1 0.0 * 00:41 
------------------------------
1 0.0 * 39:14 
1 0.0 * 47:10 
1 0.0 * 48:00 
1 0.0 * 55:00 
1 0.0 * 58:48 
LTCCS Codebook GeneralVehicle Data Set  187 


Codebook  GeneralVehicle Data Set 

N 

Prcnt 

Code 

Label 

1 0.0 * 68:12 
1 0.0 * 68:30
1,447 63.4 97:97 Not Applicable
6 0.3 98:98 No BAC Test
547 23.9 99:99 Unknown 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Format 

Type 

Length

Variable Name 

ML1207F 

Numeric 

8

PARTestSource 

Definition: Establishes the source of the data provided in the variable Alcohol Test Results. 
N 

Prcnt 

Code 

Label 
1,518 66.5 0 No BAC test/Not applicable 
205 9.0 1 Police reported 

72 3.2 2 Company reported
231 10.1 3 Medical Record
134 5.9 4 Autopsy
7 0.3 5 Lay Coroner 
24 1.1 6 No driver present 
20 0.9 8 Other (specify) 
73 3.2 9 Unknown 
Format 

Type 

Length

Variable Name 

ML192F 

Numeric 

8

PARDrugsPresent 

Definition: Establishes whether or not the police report indicated that the driver had ingested an 
other drug prior to the crash. An other drug includes all prescription, over-the-counter medications, 
as well as illicit (illegal) drugs. Police-reported presence of an other drug is not an indication that 
the drug usage was in any way the cause of the crash, even though it might have been. Finding other 
drugs in the vehicle does not by itself constitute presence. 

N 

Prcnt 

Code 

Label 
1,671 73.2 0 No other drug(s) present 

30 1.3 1 Yes other drug(s) present
453 19.8 7 Not reported
24 1.1 8 No driver present
106 4.6 9 Unknown 
LTCCS Codebook GeneralVehicle Data Set  188 


Codebook  GeneralVehicle Data Set 

Format 

Type 

Length

Variable Name 

$OT33F 

Char 

5

ZipCode 

Definition: Documents the 5-digit zip code for the drivers primary residence.
N 

Prcnt 

Code 

Label 

1 0.0 * 01607 
1 0.0 * 02842 
1 0.0 * 03431 
1 0.0 * 04730 
1 0.0 * 05676 
1 0.0 * 06040 
1 0.0 * 06812 
1 0.0 * 07055 
1 0.0 * 07073 
1 0.0 * 07109 
------------------------------
1 0.0 * 98901 
1 0.0 * 98902 
2 0.1 * 98926 
1 0.0 * 98951 
1 0.0 * 99114 
1 0.0 * 99115 
1 0.0 * 99216 
1 0.0 * 99357 
24 1.1 99998 No driver present 
27 1.2 99999 Unknown 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Format 

Type 

Length

Variable Name 

ML273F 

Numeric 

8

EthnicOrigin 

Definition: Documents the self-identification of race/ethnic origin by the driver. 
N 

Prcnt 

Code 

Label 

1,264 55.3 1 White (non-Hispanic) 
278 12.2 2 Black (non-Hispanic) 
252 11.0 3 White (Hispanic) 

14 0.6 4 Black (Hispanic) 
13 0.6 5 American Indian, Eskimo or Aleut 
50 2.2 6 Asian or Pacific Islander 
18 0.8 7 Other (specify) 
24 1.1 8 No driver present
371 16.2 9 Unknown 
LTCCS Codebook GeneralVehicle Data Set  189 


Codebook  GeneralVehicle Data Set 

Format 

Type 

Length

Variable Name 

OT27F 

Numeric 

8

CMVCrashes 

Definition: Reports the number of crashes this driver has been involved in while driving a 
Commercial Motor Vehicle (CMV) in the past 5 years, as reported by the Department of Motor 
Vehicles (DMV). 

N 

Prcnt 

Code 

Label
716 31.3 0 0 

73 3.2 1 1 
15 0.7 2 2 
7 0.3 3 3 
584 25.6 88 No official records found
24 1.1 97 No driver present
835 36.6 98 Not a CMV driver
30 1.3 99 Unknown 
Format 

Type 

Length

Variable Name 

OT27F 

Numeric 

8

CMVViolations 

Definition: Reports the number of Commercial Motor Vehicle (CMV) violations received by this 
driver in the past 5 years, as reported by the Department of Motor Vehicles (DMV). 

N 

Prcnt 

Code 

Label
420 18.4 0 0 
132 5.8 1 1 

65 2.8 2 2 
46 2.0 3 3 
24 1.1 4 4 
18 0.8 5 5 
10 0.4 6 6 
7 0.3 7 7 
6 0.3 8 8 
1 0.0 9 9 
4 0.2 10 10 
1 0.0 11 11 
1 0.0 13 13
690 30.2 88 No official records found
24 1.1 97 No driver present
835 36.6 98 Not a CMV driver 
LTCCS Codebook GeneralVehicle Data Set  190 


Codebook  GeneralVehicle Data Set 

Format 

Type 

Length

Variable Name 

OT27F 

Numeric 

8

NonCMVCrashes 

Definition: Reports the number of crashes this driver has been involved in while driving a 
non-commercial motor vehicle in the past 5 years, as reported by the Department of Motor Vehicles 
(DMV). 

N 

Prcnt 

Code 

Label
700 30.6 0 0 

78 3.4 1 1 

26 1.1 2 2 

4 0.2 3 3 

2 0.1 4 4 

1 0.0 5 5 
584 25.6 88 No official records found

24 1.1 97 No driver present
835 36.6 98 Not a CMV driver

30 1.3 99 Unknown 

Format 

Type 

Length

Variable Name 

OT27F 

Numeric 

8

NonCMVViolations 

Definition: Reports the number of violations received by this driver while driving a non-commercial 
motor vehicle in the past 5 years, as reported by the Department of Motor Vehicles (DMV). 

N 

Prcnt 

Code 

Label
229 10.0 0 0 
227 9.9 1 1 
113 4.9 2 2 

57 2.5 3 3 

41 1.8 4 4 

22 1.0 5 5 

18 0.8 6 6 

6 0.3 7 7 

7 0.3 8 8 

3 0.1 9 9 

3 0.1 10 10 

3 0.1 11 11 

1 0.0 12 12 

2 0.1 13 13 

1 0.0 14 14 

1 0.0 16 16 

1 0.0 22 22
690 30.2 88 No official records found

LTCCS Codebook GeneralVehicle Data Set  191 


Codebook  GeneralVehicle Data Set 

N Prcnt Code Label 
24 1.1 97 No driver present 
835 36.6 98 Not a CMV driver 
Variable Name Format Type Length 
TotalCrashes OT27F Numeric 8 

Definition: Reports the total number of crashes this driver has been involved in while driving any 
type of vehicle in the past 5 years, as reported by the Department of Motor Vehicles (DMV). 

N 

Prcnt 

Code 

Label
617 27.0 0 0 
135 5.9 1 1 

38 1.7 2 2 
14 0.6 3 3 
3 0.1 4 4 
2 0.1 5 5 
584 25.6 88 No official records found
24 1.1 97 No driver present
841 36.8 98 Not a CMV driver
26 1.1 99 Unknown 
Format 

Type 

Length

Variable Name 

OT27F 

Numeric 

8

GVETotalViolations 

Definition: Reports the total number of violations received by this driver (both CMV and non-CMV) 
in the past 5 years, as reported by the Department of Motor Vehicles (DMV). 

N 

Prcnt 

Code 

Label
495 21.7 0 0 
262 11.5 1 1 
175 7.7 2 2 
102 4.5 3 3 

78 3.4 4 4 
50 2.2 5 5 
31 1.4 6 6 
37 1.6 7 7 
19 0.8 8 8 
15 0.7 9 9 
8 0.4 10 10 
4 0.2 11 11 
3 0.1 12 12 
5 0.2 13 13 
6 0.3 14 14 
LTCCS Codebook GeneralVehicle Data Set  192 


Codebook  GeneralVehicle Data Set 

N 

Prcnt 

Code 

Label 

1 0.0 16 16 

1 0.0 18 18 

2 0.1 21 21 

2 0.1 22 22 

1 0.0 23 23 

7 0.3 88 No official records found 

24 1.1 97 No driver present 
937 41.0 98 Not a CMV driver 

19 0.8 99 Unknown 

Format 

Type 

Length

Variable Name 

OT27F 

Numeric 

8

PrevViolations 

Definition: Reports the total number of violations received by this driver (both CMV and non-CMV) 
in the years previous to the last 5 years, as reported by the Department of Motor Vehicles (DMV). 

N 

Prcnt 

Code 

Label
368 16.1 0 0 
118 5.2 1 1 

71 3.1 2 2 

47 2.1 3 3 

35 1.5 4 4 

25 1.1 5 5 

10 0.4 6 6 

12 0.5 7 7 

5 0.2 8 8 

13 0.6 9 9 

4 0.2 10 10 

4 0.2 11 11 

4 0.2 12 12 

5 0.2 13 13 

3 0.1 14 14 

1 0.0 15 15 

2 0.1 16 16 

2 0.1 17 17 

2 0.1 20 20 

2 0.1 21 21 

1 0.0 22 22 

1 0.0 26 26
690 30.2 88 No official records found

24 1.1 97 No driver present
835 36.6 98 Not a CMV driver 

LTCCS Codebook GeneralVehicle Data Set  193 


Codebook  GeneralVehicle Data Set 

Format 

Type 

Length

Variable Name 

OT27F 

Numeric 

8

UnkTypeCrashes 

Definition: Reports the number of crashes this driver has been involved in while driving an unknown 
type vehicle in the past 5 years, as reported by the Department of Motor Vehicles (DMV). 

N 

Prcnt 

Code 

Label 

15 0.7 0 0 
1,406 61.6 88 No official records found 
24 1.1 97 No driver present
835 36.6 98 Not a CMV driver
4 0.2 99 Unknown 
Variable Name 

Format 

Type 

Length 

OT27F 

Numeric 

8

MCMIScrashes 

Definition: Reports the number of crashes this driver has been involved in while driving a 
commercial motor vehicle (CMV), as reported to the Motor Carrier Management Information System 
(MCMIS). 

N 

Prcnt 

Code 

Label
261 11.4 0 0 
292 12.8 1 1 

48 2.1 2 2 
5 0.2 3 3 
582 25.5 88 No official records found
24 1.1 97 No driver present 
1,072 46.9 98 Not a CMV driver 
Variable Name 

Format 

Type 

Length 

OT27F 

Numeric 

8

MCMIScmvViolations 

Definition: Represents the total number of types of inspection violations cited to this driver (not 
including local violations), as reported by the Motor Carrier Management Information System 
(MCMIS). 

N 

Prcnt 

Code 

Label 

15 0.7 0 0 
66 2.9 1 1 
44 1.9 2 2 
52 2.3 3 3 
55 2.4 4 4 
46 2.0 5 5 
38 1.7 6 6 
36 1.6 7 7 
LTCCS Codebook GeneralVehicle Data Set  194 


Codebook  GeneralVehicle Data Set 

N 

Prcnt 

Code 

Label 

38 1.7 8 8 

23 1.0 9 9 

18 0.8 10 10 

17 0.7 11 11 

13 0.6 12 12 

11 0.5 13 13 

8 0.4 14 14 

8 0.4 15 15 

3 0.1 16 16 

5 0.2 17 17 

4 0.2 18 18 

1 0.0 19 19 

2 0.1 20 20 

5 0.2 21 21 

2 0.1 22 22 

1 0.0 23 23 

1 0.0 25 25 

2 0.1 26 26 

1 0.0 30 30
582 25.5 88 No official records found

24 1.1 97 No driver present
1,163 50.9 98 Not a CMV driver 

Format 

Type 

Length

Variable Name 

OT27F 

Numeric 

8

MCMIScmvNonViolations 

Definition: Represents the total number of types of local inspection violations cited to this driver, 
as reported by the Motor Carrier Management Information System (MCMIS). 

N 

Prcnt 

Code 

Label
203 8.9 0 0 
198 8.7 1 1 

88 3.9 2 2 

22 1.0 3 3 

3 0.1 4 4 

1 0.0 5 5 
582 25.5 88 No official records found

24 1.1 97 No driver present 
1,163 50.9 98 Not a CMV driver 

LTCCS Codebook GeneralVehicle Data Set  195 


Codebook  HazMat Data Set 

HazMat Data Set 

The HazMat data set contains information on hazardous material cargo for trucks carrying such 
material at the time of the crash. There is a record for each hazardous material. 

The HazMat data set contains the variables CaseID, PSU, PSUStrat, RATWeight, and 
VehicleNumber. CaseID, VehicleNumber and Material uniquely identify each record in this data set. 
CaseID and VehicleNumber should be used to merge the HazMat data set with vehicle level data 
sets. 

Format 

Type 

Length

Variable Name 

ML644F 

Numeric 

8

Material 

Definition: Establishes the type of hazardous material that the vehicle was transporting at the time 
of the crash, as reported by the Truck Inspector. The attributes are FMCSA-generated designations. 

N 

Prcnt 

Code 

Label 

7 12.3 7 2.1 Flammable Gas 
4 7.0 8 2.2 Nonflammable Gas 
1 1.8 10 2.1 LPG
21 36.8 17 3 Flammable
2 3.5 20 6.1 (Liquids) 
6 10.5 21 3 Combustible Liquid 
1 1.8 22 4.1 Flammable Solid 
1 1.8 24 4.3 Dangerous wn/Wet 
1 1.8 25 5.1 Oxidizer 
1 1.8 28 6.1 Zone A 
7 12.3 33 8 Corrosive Material 
1 1.8 34 8 (PIH) Zone A 
2 3.5 36 9 Miscellaneous HM 
1 1.8 37 9 (Elev Temp Materl) 
1 1.8 41 9 (Hazardous Waste) 
Variable Name 

Format 

Type 

Length 

ML645F 

Numeric 

8

Reportable 

Definition: Establishes whether or not the hazardous material that was being transported was a 
reportable quantity, as reported by the Truck Inspector. This is an FMCSA-generated variable. 

N Prcnt Code Label 
44 77.2 1 Yes 
11 19.3 2 No 
2 3.5 99 Unknown 

LTCCS Codebook HazMat Data Set  196 


Codebook  HazMat Data Set 

Format 

Type 

Length

Variable Name 

ML646F 

Numeric 

8

Waiver 

Definition: Establishes whether or not the carrier had a waiver in place for the hazardous material 
that was being transported at the time of the crash, as reported by the Truck Inspector. This is an 
FMCSA-generated variable. 

N Prcnt Code Label 
1 1.8 1 Yes 
50 87.7 2 No 
6 10.5 99 Unknown 

LTCCS Codebook HazMat Data Set  197 


Codebook  HazMatinsp Data Set 

HazMatinsp Data Set 

The HazMatInsp data set contains information about hazardous material inspections for trucks 
carrying such material at the time of the crash. There is a record for each hazardous material 
inspection. 

The HazMatInsp data set contains the variables CaseID, PSU, PSUStrat, RATWeight, and 
VehicleNumber. CaseID, VehicleNumber and HMIInspection uniquely identify each record in this 
data set. CaseID and VehicleNumber should be used to merge the HazMatInsp data set with vehicle 
level data sets. 

Format 

Type 

LengthVariable Name 

$3 

Char 

3

InspectionExists 

Definition: Establishes whether or not the truck was inspected by a certified North American 
Commercial Vehicle Inspector, and that an official truck inspection document exists. 

N Prcnt Code Label 
206 5.0 N/A N/A 
2,052 50.0 NO NO 
1,849 45.0 YES YES 

Variable Name 

Format 

Type 

Length 

ML641F 

Numeric 

8

HMIInspection 

Definition: A listing of the inspection items required by FMCSA, to be completed by the Truck 
Inspector, when the truck is transporting hazardous materials. This is an FMCSA-generated variable. 

N 

Prcnt 

Code 

Label
172 4.2 1 Ship paper/manifest (HA)
169 4.1 2 HM license (HB)
167 4.1 3 HW registration (HC)
170 4.1 4 Placards (HD)
168 4.1 5 Packaging (HE)
170 4.1 6 Markings (HF)
168 4.1 7 Labels (HG)
169 4.1 8 Loading/securement (HH)
168 4.1 9 Cargo/portable tanks (HI)
170 4.1 10 Safety equipment (HJ)
206 5.0 11 Not applicable
158 3.8 12 (Inspection not required)

2,052 50.0 99 Unknown 

LTCCS Codebook HazMatinsp Data Set  198 


Codebook  HazMatinsp Data Set 
Variable Name Format Type Length 
HMIViolation ML642F Numeric 8 

Definition: Indicates whether or not the items listed in the variable Hazardous Material Inspection 
are in violation of FMCSA standards. This is an FMCSA-generated variable. 

N Prcnt Code Label 
111 2.7 1 Yes 
1,483 36.1 2 No 
2,513 61.2 9 Unknown 

Variable Name 

Format 

Type 

Length 

ML642F 

Numeric 

8

HMIOutOfService 

Definition: Establishes whether or not a particular violation is classified as out-of-service. This 
variable is related to the Violation variable, which is related to the Hazardous Material Inspection 
variable. This is an FMCSA-generated variable. 

N Prcnt Code Label 
39 0.9 1 Yes 
1,381 33.6 2 No 
2,687 65.4 9 Unknown 

Format 

Type 

LengthVariable Name 

ML640F 

Numeric 

8

HMIDisposition 

Definition: Documents the disposition of each violation (how it was handled) by the Truck Inspector. 
This variable is related to the Violation variable, which is related to the Hazardous Material 
Inspection variable. This is an FMCSA-generated variable. 

N 

Prcnt 

Code 

Label 

87 2.1 2 Towed/Escorted 
3 0.1 3 Other (Specify) 
1,644 40.0 8 Not Applicable 
2,373 57.8 9 Unknown 
LTCCS Codebook HazMatinsp Data Set  199 


Codebook  Injuries Data Set 

Injuries Data Set 

The Injuries data set contains all the injury information for occupants of vehicles involved in the crash. 
Each occupant injury is assigned a sequential injury number. This material is provided as one record 
per injury. 

The Injuries data set contains the variables CaseID, PSU, PSUStrat, RATWeight, VehicleNumber, 
OccupantNumber and InjuryNumber. OccupantNumber is assigned to each occupant in a vehicle. 
InjuryNumber is assigned to each occupants injuries. CaseID, VehicleNumber, OccupantNumber 
and InjuryNumber uniquely identify each record in this data set. CaseID, VehicleNumber and 
OccupantNumber should be used to merge the Injuries data set with the Occupant data sets. 

Variable Name 

Format 

Type 

Length 

BEST8 

Numeric 

8

OccupantNumber 

Definition: Number assigned to each occupant in a vehicle. 
N 

Prcnt 

Code 

Label 
7,110 79.6 1 1 
1,284 14.4 2 2 
305 3.4 3 3 
145 1.6 4 4 

54 0.6 5 5 

23 0.3 6 6 

8 0.1 7 7 

3 0.0 8 8 

1 0.0 9 9 

2 0.0 10 10 

2 0.0 11 11 

Format 

Type 

Length

Variable Name 

BEST8 

Numeric 

8

InjuryNumber 

Definition: Number assigned to each occupants injuries. 
N 

Prcnt 

Code 

Label 
1,544 17.3 1 1 
1,237 13.8 2 2 
964 10.8 3 3 
751 8.4 4 4 
580 6.5 5 5 
479 5.4 6 6 
391 4.4 7 7 
334 3.7 8 8 
294 3.3 9 9 
252 2.8 10 10 
------------------------------

LTCCS Codebook Injuries Data Set  200 


Codebook  Injuries Data Set 

N 

Prcnt 

Code 

Label 

8 0.1 40 40 
8 0.1 41 41 
7 0.1 42 42 
4 0.0 43 43 
4 0.0 44 44 
4 0.0 45 45 
3 0.0 46 46 
2 0.0 47 47 
1 0.0 48 48 
1 0.0 49 49 
Format 

Type 

Length

Variable Name 

$100 

Char 

100

OINDescription 

Definition: Provides a description of each injury.
N 

Prcnt 

Code 

Label 

1 0.0 * Abdomen Laceration NFS
104 1.2 * Abdomen Skin abrasion
1 0.0 * Abdomen Skin avulsion blood loss > 20% by volume 
126 1.4 * Abdomen Skin contusion
2 0.0 * Abdomen Skin laceration major 
3 0.0 * Abdomen Skin laceration minor 
8 0.1 * Acromioclavicular joint dislocation 
1 0.0 * Acromion fracture 
11 0.1 * Adrenal gland contusion NFS 
2 0.0 * Adrenal gland contusion minor 
------------------------------
17 0.2 * Vault skull fracture complex 
1 0.0 * Vault skull fracture massively depressed 
3 0.0 * Vena Cava laceration major 
3 0.0 * Vena Cava laceration NFS 
1 0.0 * Vena cava, inferior laceration NFS 
1 0.0 * Vulva contusion (OIS Grade I) 
7 0.1 * Wrist (carpus) joint dislocation 
1 0.0 * Wrist (carpus) joint crush 
9 0.1 * Wrist (carpus) joint sprain 
11 0.1 * Zygoma/malar fracture 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

LTCCS Codebook Injuries Data Set  201 


Codebook  Injuries Data Set 
Variable Name 

Format 

Type 

Length 

BEST8 

Numeric 

8

AISCode 

Definition: A listing of the Abbreviated Injury Scale (AIS) codes. The AIS is a numerical method for 
ranking and comparing injuries by severity. 

N 

Prcnt 

Code 

Label 

95 1.1 1102021 1102021
216 2.4 1104021 1104021

16 0.2 1106001 1106001
188 2.1 1106021 1106021

4 0.0 1106042 1106042 

1 0.0 1108001 1108001 

2 0.0 1108021 1108021 

14 0.2 1130006 1130006 

8 0.1 1150999 1150999 

2 0.0 1159997 1159997 
------------------------------

6 0.1 9106001 9106001 

1 0.0 9192002 9192002 

10 0.1 9192023 9192023 

2 0.0 9192044 9192044 

1 0.0 9920001 9920001 

1 0.0 9920021 9920021 

1 0.0 9920163 9920163 

1 0.0 9920285 9920285 

11 0.1 9920305 9920305 

16 0.2 9920326 9920326 

Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Format 

Type 

Length

Variable Name 

ML77F 

Numeric 

8

Aspect 

Definition: Documents the location on the body where the injury occurred. 

N 

Prcnt 

Code 

Label
469 5.2 0 Whole Region
2,284 25.6 1 Right
2,665 29.8 2 Left
738 8.3 3 Bilateral
410 4.6 4 Central
244 2.7 5 Anterior/Front/Ventral
544 6.1 6 Posterior/Back/Dorsal
566 6.3 7 Superior/Upper

LTCCS Codebook Injuries Data Set  202 


Codebook  Injuries Data Set 
N Prcnt Code Label 
681 7.6 8 Inferior/Lower 
336 3.8 9 Unknown/Multiple Regions 
Variable Name Format Type Length 
InjurySourceCat OT35F Numeric 8 

Definition: Documents the general area of the vehicle in which the source of injury is located. 
N 

Prcnt 

Code 

Label 

2,007 22.5 1 Front 
700 7.8 2 Left Side 
278 3.1 3 Right Side 

1,086 12.2 4 Interior 
178 2.0 5 Air Bag 
373 4.2 6 Roof 
250 2.8 7 Floor 

16 0.2 8 Rear 
70 0.8 10 Exterior of Occupant's Vehicle
324 3.6 11 Exterior of Other Motor Vehicle
468 5.2 12 Other Vehicle or Object in the Environment
538 6.0 13 Noncontact Injury
1,044 11.7 14 Injured, unknown source 
1,605 18.0 99 Unknown 

Variable Name 

Format 

Type 

Length 

ML73F 

Numeric 

8

InjurySource 

Definition: Documents the object that caused a particular injury. 
N 

Prcnt 

Code 

Label
158 1.8 1 Windshield

9 0.1 3 Sunvisor
315 3.5 4 Steering wheel rim
12 0.1 5 Steering wheel hub/spoke
429 4.8 6 Steering wheel (combination of codes 004 and 005)
21 0.2 7 Steering column, transmission selector lever, other attachment 
21 0.2 8 Cellular telepone or CB radio
493 5.5 10 Left instrument panel and below
69 0.8 11 Center instrument panel and below
166 1.9 12 Right instrument panel and below
11 0.1 13 Glove compartment door
213 2.4 14 Knee bolster
65 0.7 15 Win. incl. 1/+:fr header,A(A1/A2)-pillar,instr. panel,mirror,or 
LTCCS Codebook Injuries Data Set  203 


Codebook  Injuries Data Set 

N 

Prcnt 

Code 

Label 

10 0.1 16 Win. incl. 1/+:fr header,A(A1/A2)-pillar,instr. panel,or 
13 0.1 17 Windshield reinforced by exterior object(specify) 
2 0.0 19 Other front object(specify) 
377 4.2 51 Left side interior surface, excluding hardware or armrests 
95 1.1 52 Left side hardware or armrest 
50 0.6 53 Left A(A1/A2)-pillar
106 1.2 54 Left B-pillar
27 0.3 56 Left side window glass 
32 0.4 57 Left side window frame 
11 0.1 59 Lt side win. glass incl. 1/+:frame,win. 
2 0.0 60 Other left side object (specify) 
149 1.7 101 Right side interior surface, excluding hardware or armrests 
9 0.1 102 Right side hardware or armrest 
5 0.1 103 Right A (A1/A2)-pillar 
84 0.9 104 Right B-pillar 
1 0.0 105 Other right pillar (specify) 
16 0.2 106 Right side window glass 
7 0.1 107 Right side window frame 
3 0.0 108 RIght side window sill 
3 0.0 109 Rt side win. glass incl. 1/+:frame,win. 
1 0.0 110 Other right side object (specify)
330 3.7 151 Seat, back support
581 6.5 152 Belt restraint webbing/buckle
8 0.1 153 Belt restraint B-pillar or door frame attachment point 
35 0.4 155 Head restraint system 
50 0.6 160 Other occupants(specify) 
7 0.1 161 Interior loose objects (specify) 
15 0.2 162 Child safety seat (specify) 
23 0.3 163 Other interior object (specify) 
18 0.2 164 Center console first row 
17 0.2 167 Fold down armrest first row 
42 0.5 170 Air bag-driver side 
5 0.1 171 Air bag-driver side and eyewear 
5 0.1 180 Air bag-passenger side 
2 0.0 195 Other air bag compartment cover (specify)
107 1.2 201 Front header
10 0.1 202 Rear header 
79 0.9 203 Roof left side rail 
23 0.3 204 Roof right side rail
140 1.6 205 Roof or convertible top
13 0.1 206 Roof maplight/console 
1 0.0 208 Roll-bar
135 1.5 251 Floor (including toe pan)
LTCCS Codebook Injuries Data Set  204 


Codebook  Injuries Data Set 

N 

Prcnt 

Code 

Label 

56 0.6 252 Floor or console mounted transmission lever, including console 
2 0.0 253 Parking brake handle 
57 0.6 254 Foot controls including parking brake 
9 0.1 301 Backlight (rear window) 
7 0.1 303 Other rear object(specify)
105 1.2 320 Air bag
11 0.1 321 Air bag and eyewear 
1 0.0 322 Air bag and jewelry 
7 0.1 325 Air bag compartment cover 
20 0.2 451 Hood 
2 0.0 452 Outside hardware(e.g., outside mirror, antenna) 
40 0.4 453 Other exterior surface or tires (specify) 
19 0.2 454 Unknown exterior objects 
30 0.3 501 Front bumper 
38 0.4 502 Hood edge 
53 0.6 503 Other front of vehicle (specify) 
3 0.0 506 Windshield, roof rail, A-pillar 
46 0.5 507 Side surface 
60 0.7 510 Rear surface 
25 0.3 511 Undercarriage 
5 0.1 512 Tires and wheels 
11 0.1 513 Other exterior of other motor vehicle (specify) 
42 0.5 514 Unknown exterior of other motor vehicle
339 3.8 551 Ground
2 0.0 570 Same occupant contact (specify) [ex-knee]
129 1.4 598 Other vehicle or object (specify)
48 0.5 601 Fire in vehicle
152 1.7 602 Flying glass
90 1.0 603 Other noncontact injury source (specify) 
2 0.0 604 Air bag exhaust gases 
246 2.8 697 Injured, unknown source
2,649 29.6 999 Unknown injury source 

LTCCS Codebook Injuries Data Set  205 


Codebook  Injuries Data Set 
Variable Name 
IntrusionRowFormat 
ML53F 
Type 
Numeric 
Length 
8 
Definition: Documents the seat row of the vehicle where the intrusion occurred. 
N Prcnt Code Label 
598 6.7 1 Front Seat 
34 0.4 2 Second Seat 
12 0.1 3 Third Seat 
8,293 92.8 99 Unknown 
Variable Name 
IntrusionLocation 
Format 
ML54F 
Type 
Numeric 
Length 
8 

Definition: Describes the location within a particular seat row of the vehicle into which the intrusion 
occurred. 

N 

Prcnt 

Code 

Label
462 5.2 1 Left

20 0.2 2 Middle 
162 1.8 3 Right 
8,293 92.8 99 Unknown 

Variable Name 

Format 

Type 

Length 

ML60F 

Numeric 

8

CrushDirection 

Definition: Documents the direction of the intrusion of a particular component into the passenger 
compartment. 

N 

Prcnt 

Code 

Label 

56 0.6 1 Vertical
309 3.5 2 Longitudinal
279 3.1 3 Lateral
8,293 92.8 9 Unknown 

Variable Name 

Format 

Type 

Length 

ML455F 

Numeric 

8

CrushMagnitude 

Definition: Documents a components magnitude of intrusion into the passenger compartment. 
N 

Prcnt 

Code 

Label 

6 0.1 0 <= 2 cms 
34 0.4 1 >= 3 to < 8 cms
139 1.6 2 >= 8 to < 15 cms
160 1.8 3 >= 15 to < 30 cms
LTCCS Codebook Injuries Data Set  206 


Codebook  Injuries Data Set 

N 

Prcnt 

Code 

Label
117 1.3 4 >= 30 to < 46 cms

76 0.9 5 >= 46 to < 61 cms 
85 1.0 6 >= 61 cms
8,320 93.1 9 Unknown 
Variable Name 

Format 

Type 

Length 

OT34F 

Numeric 

8

Component 

Definition: Documents the vehicle component that intruded into the passenger compartment and 
caused a particular injury. 

N 

Prcnt 

Code 

Label 

52 0.6 1 Steering Assembly
114 1.3 2 Instrument panel left
6 0.1 3 Instrument panel center 
57 0.6 4 Instrument panel right 
28 0.3 5 Toe pan 
10 0.1 6 A (A1/A2)-pillar 
58 0.6 7 B-pillar
127 1.4 11 Door panel (side)
19 0.2 12 Side panel -rear of the B-pillar 
21 0.2 13 Roof (or convertible top) 
1 0.0 14 Roof side rail 
16 0.2 15 Windshield 
14 0.2 16 Windshield header 
4 0.0 18 Floor pan (includes sill) 
2 0.0 19 Backlight header 
34 0.4 20 Front seat back 
1 0.0 25 Seat cushion 
4 0.0 27 Other interior component (specify): 
76 0.9 32 Other exterior object in the environment (specify): 
8,293 92.8 99 Unknown 
Format 

Type 

Length

Variable Name 

ML76F 

Numeric 

8

InformationSource 

Definition: Identifies the source of information used to complete AIS coding for each injury. 

N Prcnt Code Label 
2,941 32.9 1 Autopsy 
1,955 21.9 2 Post-ER Medical Record 
2,718 30.4 8 Emergency Room Records 
50 0.6 9 Private Physician 

LTCCS Codebook Injuries Data Set  207 


Codebook  Injuries Data Set 

N 

Prcnt 

Code 

Label 

22 0.2 10 Lay Coroner 
23 0.3 11 EMS Record 
1,130 12.6 12 Interviewee 
95 1.1 13 Police Report 
3 0.0 99 Unknown 
LTCCS Codebook Injuries Data Set  208 


Codebook  JackknifeAssessments Data Set 

JackknifeAssessments Data Set 

The JackknifeAssessments data set contains jackknife information on all vehicles. This material is 
provided as one record per vehicle. 

The JackknifeAssessments data set contains the variables CaseID, PSU, PSUStrat, RATWeight, 
and VehicleNumber. CaseID and VehicleNumber uniquely identify each record in this data set and 
should be used to merge the JackknifeAssessments data set with other vehicle level data sets. 

Format 

Type 

Length

Variable Name 

ML1613F 

Numeric 

8

AJKType 

Definition: Establishes the type of precrash jackknife event that is experienced by the subject 
vehicle. In general, the type of jackknife event is determined by the unit of the articulated combination 
that begins to rotate first. For example, if the tractor/cab unit is the first unit to begin rotating, the 
event is generally considered a tractor jackknife. If, on the other hand, the trailer unit is the first unit to 
begin rotating, the event is generally considered to be trailer swing. 

N 

Prcnt 

Code 

Label
855 37.4 0 No pre-crash jackknife

19 0.8 1 Tractor jackknife 
42 1.8 2 Trailer swing 
1,366 59.8 7 Not applicable 
2 0.1 9 Unknown 
Variable Name 

Format 

Type Length 

ML1611F 

Numeric 

8

AJKSource 

Definition: Establishes the source of the jackknife impetus.
N 

Prcnt 

Code 

Label
851 37.3 0 No pre-crash jackknife

15 0.7 1 Steering input 
12 0.5 2 Braking input 
18 0.8 3 Steering and braking input 
6 0.3 4 Environmental condition (specify) 
1 0.0 5 Vehicle condition (specify) 
1,370 60.0 7 Not applicable 
9 0.4 8 Combination of sources (specify) 
2 0.1 9 Unknown 
LTCCS Codebook JackknifeAssessments Data Set  209 


Codebook  JackknifeAssessments Data Set 

Format 

Type 

Length

Variable Name 

ML1612F 

Numeric 

8

AJKLocation 

Definition: Establishes the location of the vehicle at the start of the jackknife sequence.
N 

Prcnt 

Code 

Label
851 37.3 0 No pre-crash event

54 2.4 1 On roadway 
4 0.2 2 On shoulder 
2 0.1 3 On roadside 
1 0.0 4 On median 
1,370 60.0 7 Not applicable 
2 0.1 9 Unknown 
Format 

Type 

Length

Variable Name 

ML1610F 

Numeric 

8

AJKDirection 

Definition: Establishes the direction of rotation of the first unit within the articulated vehicle 
configuration to begin jackknifing. 

N Prcnt Code Label 
851 37.3 0 No pre-crash jackknife 
33 1.4 1 Clockwise 
28 1.2 2 Counterclockwise 
1,364 59.7 7 Not applicable 
8 0.4 9 Unknown 

Format 

Type 

Length

Variable Name 

BEST8 

Numeric 

8

WhileCount 

Definition: Documents the number of circumstances in which the jackknife occurred that were 
coded to this vehicle. 

N 

Prcnt 

Code 

Label 
2,224 97.4 0 0 

9 0.4 1 1 
24 1.1 2 2 
26 1.1 3 3 
1 0.0 4 4 
LTCCS Codebook JackknifeAssessments Data Set  210 


Codebook  JackknifeAssessments Data Set 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

AJKConstant 

Definition: Establishes whether or not the driver is attempting to maintain a constant velocity at the 
time the vehicle begins to jackknife. (This variable was originally an attribute choice under the 
variable Circumstances In Which Event Occurred.) 

N Prcnt Code Label 
2,266 99.2 0 Absent 
18 0.8 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

AJKCurve 

Definition: Establishes whether or not the driver is traversing a curve at the time the vehicle begins to 
jackknife. (This variable was originally an attribute choice under the variable Circumstances In 

Which Event Occurred.) 
N Prcnt Code Label 
2,264 99.1 0 Absent 
20 0.9 1 Present 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

AJKTurn 

Definition: Establishes whether or not the driver is attempting to turn at the time the vehicle begins 
to jackknife. (This variable was originally an attribute choice under the variable Circumstances In 

Which Event Occurred.) 
N Prcnt Code Label 
2,282 99.9 0 Absent 
2 0.1 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

AJKLightBraking 

Definition: Establishes whether or not the driver is decelerating using light braking effort at the time 
the vehicle begins to jackknife. While the term light braking is a subjective evaluation, it generally 
implies that the level of braking effort is less than the level typically associated with a normal traffic 
stop. (This variable was originally an attribute choice under the variable Circumstances In Which 

Event Occurred.) 
N Prcnt Code Label 
2,278 99.7 0 Absent 
6 0.3 1 Present 

LTCCS Codebook JackknifeAssessments Data Set  211 


Codebook  JackknifeAssessments Data Set 

Format 

Type 

LengthVariable Name 

AP1U 

Numeric 

8 

Definition: Establishes whether or not the driver is accelerating at the time the vehicle begins to 
jackknife. (This variable was originally an attribute choice under the variable Circumstances In 

AJKAccelerating 

Which Event Occurred.) 
N Prcnt Code Label 
2,283 100.0 0 Absent 
1 0.0 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

AJKAvoidance 

Definition: Establishes whether or not the driver initiates a precrash avoidance maneuver at or prior 
to the time the vehicle begins to jackknife. (This variable was originally an attribute choice under the 
variable Circumstances In Which Event Occurred.) 

N Prcnt Code Label 
2,255 98.7 0 Absent 
29 1.3 1 Present 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

AJKOther 

Definition: Establishes whether or not the circumstance associated with the jackknife is not 
described by the other jackknife event variables. (This variable was originally an attribute choice 
under the variable Circumstances In Which Event Occurred and was the Other (specify): 

attribute.) 
N Prcnt Code Label 
2,276 99.6 0 Absent 
8 0.4 1 Present 

Format 

Type 

LengthVariable Name 

AP1U 

Numeric 

8

AJKDecelerating 

Definition: Establishes whether or not the driver is decelerating and decelerates solely by reducing 
throttle input at the time the vehicle begins to jackknife. (This variable was originally an attribute 
choice under the variable Circumstances In Which Event Occurred.) 

N 

Prcnt 

Code 

Label 
2,283 100.0 0 Absent 

1 0.0 1 Present 
LTCCS Codebook JackknifeAssessments Data Set  212 


Codebook  JackknifeAssessments Data Set 

Format 

Type 

LengthVariable Name 

AP1U 

Numeric 

8

AJKModerateBraking 

Definition: Establishes whether or not the driver is decelerating using a moderate level of braking 
effort at the time the vehicle begins to jackknife. A moderate level of braking effort generally implies 
that the level of braking effort is similar to the level typically associated with a normal traffic stop. 
(This variable was originally an attribute choice under the variable Circumstances In Which Event 

Occurred.) 
N Prcnt Code Label 
2,276 99.6 0 Absent 
8 0.4 1 Present 

Format 

Type 

LengthVariable Name 

AP1U 

Numeric 

8

AJKHeavyBraking 

Definition: Establishes whether or not the driver is decelerating using a heavy level of braking effort 

(e.g. panic stop) at the time the vehicle begins to jackknife. The vehicle will typically experience 
wheel lock-up in this circumstance; however, wheel lock is not a requirement for using this 
designation. (This variable was originally an attribute choice under the variable Circumstances In 
Which Event Occurred.) 
N 

Prcnt 

Code 

Label 
2,263 99.1 0 Absent 

21 0.9 1 Present 
Format 

Type 

LengthVariable Name 

AP1U 

Numeric 

8

AJKStraight 

Definition: Establishes whether or not the driver is traversing a straight roadway segment at the 
time the vehicle begins to jackknife. (This variable was originally an attribute choice under the 
variable Circumstances In Which Event Occurred.) 

N 

Prcnt 

Code 

Label 
2,259 98.9 0 Absent 

25 1.1 1 Present 
LTCCS Codebook JackknifeAssessments Data Set  213 


Codebook  MCMISdriverData Data Set 

MCMISdriverData Data Set 

The MCMISdriverData data set contains the number of prior crashes, vehicle inspections and 
inspection violations associated with this driver as reported by the Motor Carrier Management 
Information System. One record is stored for each vehicle/driver where this information is available. 

The MCMISdriverData data set contains the variables CaseID, PSU, PSUStrat, RATWeight, and 
VehicleNumber. CaseID and VehicleNumber uniquely identify each record in this data set and 
should be used to merge the MCMISdriverData data set with vehicle level data sets. 

Format 

Type 

Length

Variable Name 

OT41F 

Numeric 

8

Crashes 

Definition: Represents the total number of crashes for this driver, as reported by the Motor Carrier 
Management Information System (MCMIS). 

N 

Prcnt 

Code 

Label
300 29.5 0 0 
363 35.7 1 1 

57 5.6 2 2 
6 0.6 3 3 
290 28.5 99 Unknown 
Format 

Type 

Length

Variable Name 

OT41F 

Numeric 

8

Inspections 

Definition: Represents the total number of inspections performed on a vehicle driven by this driver, 
as reported by the Motor Carrier Management Information System (MCMIS). 

N 

Prcnt 

Code 

Label 

33 3.2 0 0 
168 16.5 1 1 
99 9.7 2 2 
92 9.1 3 3 
76 7.5 4 4 
64 6.3 5 5 
37 3.6 6 6 
38 3.7 7 7 
23 2.3 8 8 
19 1.9 9 9 
16 1.6 10 10 
12 1.2 11 11 
6 0.6 12 12 
10 1.0 13 13 
6 0.6 14 14 
6 0.6 15 15 
1 0.1 16 16 
LTCCS Codebook MCMISdriverData Data Set  214 


Codebook  MCMISdriverData Data Set 

N Prcnt Code Label 
6 0.6 17 17 
2 0.2 18 18 
2 0.2 20 20 
1 0.1 21 21 
1 0.1 22 22 
1 0.1 24 24 
1 0.1 29 29 
4 0.4 30 30 
2 0.2 50 50 
290 28.5 99 Unknown 
Variable Name Format Type Length 
InspDriverOOS OT41F Numeric 8 

Definition: Represents the total number of driver out-of-service violations for this driver, as 
reported by the Motor Carrier Management Information System (MCMIS). 

N 

Prcnt 

Code 

Label
553 54.4 0 0 
126 12.4 1 1 

32 3.1 2 2 
7 0.7 3 3 
4 0.4 4 4 
2 0.2 5 5 
1 0.1 8 8 
1 0.1 9 9 
290 28.5 99 Unknown 
Variable Name 

Format 

Type 

Length 

OT41F 

Numeric 

8

InspVehOOS 

Definition: Represents the total number of vehicle out-of-service violations for this driver, as 
reported by the Motor Carrier Management Information System (MCMIS). 

N 

Prcnt 

Code 

Label
322 31.7 0 0 
242 23.8 1 1 
102 10.0 2 2 

34 3.3 3 3 
13 1.3 4 4 
3 0.3 5 5 
5 0.5 6 6 
4 0.4 7 7 
LTCCS Codebook MCMISdriverData Data Set  215 


Codebook  MCMISdriverData Data Set 

N 
1 
290 
Prcnt 
0.1 
28.5 
Code 
8 
99 
Label 
8 
Unknown 
Variable Name 
LocalViols 
Format 
OT41F 
Type 
Numeric 
Length 
8 

Definition: Represents the total number of types of local inspection violations cited to this driver, 
as reported by the Motor Carrier Management Information System (MCMIS). 

N 

Prcnt 

Code 

Label
252 24.8 0 0 
223 21.9 1 1 
107 10.5 2 2 

28 2.8 3 3 
4 0.4 4 4 
1 0.1 5 5 
401 39.5 99 Unknown 
Variable Name 

Format 

Type 

Length 

OT41F 

Numeric 

8

InspViols 

Definition: Represents the total number of types of inspection violations cited to this driver (not 
including local violations), as reported by the Motor Carrier Management Information System 
(MCMIS). 

N 

Prcnt 

Code 

Label 

20 2.0 0 0 
81 8.0 
53 5.2 
63 6.2 
67 6.6 
51 5.0 
45 4.4 
41 4.0 
45 4.4 
29 2.9 
21 2.1 
20 2.0 
16 1.6 
12 1.2 
10 1.0 
8 0.8 
5 0.5 
6 0.6 
LTCCS Codebook MCMISdriverData Data Set  216 


Codebook  MCMISdriverData Data Set 

N 

Prcnt 

Code 

Label 

6 0.6 18 18 

1 0.1 19 19 

3 0.3 20 20 

5 0.5 21 21 

2 0.2 22 22 

1 0.1 23 23 

1 0.1 25 25 

2 0.2 26 26 

1 0.1 30 30 
401 39.5 99 Unknown 

LTCCS Codebook MCMISdriverData Data Set  217 


Codebook  MCMISviolation Data Set 

MCMISviolation Data Set 

The MCMISviolation data set contains information on the specific inspection violations issued to a 
driver for previous inspections as reported by the Motor Carrier Management Information System. 
One record of this information exists for each violation. 

The MCMISviolation data set contains the variables CaseID, PSU, PSUStrat, RATWeight, and 
VehicleNumber. CaseID, VehicleNumber and Code uniquely identify each record in this data set. 
CaseID and VehicleNumber should be used to merge the MCMISviolation data set with the 
MCMISdriverData data set and vehicle level data sets. 

Format 

Type 

Length

Variable Name 

OT41F 

Numeric 

8

NumViols 

Definition: Represents the number of violation codes cited to this driver, as reported by the Motor 
Carrier Management Information System (MCMIS). 

N 

Prcnt 

Code 

Label 
3,199 74.2 1 1 
745 17.3 2 2 
187 4.3 3 3 

85 2.0 4 4 

48 1.1 5 5 

16 0.4 6 6 

11 0.3 7 7 

5 0.1 8 8 

5 0.1 9 9 

2 0.0 10 10 

2 0.0 11 11 

1 0.0 13 13 

1 0.0 14 14 

2 0.0 99 Unknown 

Variable Name 

Format 

Type 

Length 

OT41F 

Numeric 

8

NumOOSViols 

Definition: Represents the number of out-of-service codes cited to this driver, as reported by the 
Motor Carrier Management Information System (MCMIS). 

N 

Prcnt 

Code 

Label 
3,289 76.3 0 0 
865 20.1 1 1 
117 2.7 2 2 

21 0.5 3 3 

3 0.1 4 4 

2 0.0 5 5 

12 0.3 99 Unknown 

LTCCS Codebook MCMISviolation Data Set  218 


Codebook  MCMISviolation Data Set 

Format 

Type 

Length

Variable Name 

$12 

Char 

12

Code 

Definition: Represents the violation codes cited to this driver, as reported by the Motor Carrier 
Management Information System (MCMIS). This coding structure was established by the Federal 
Motor Carrier Safety Administration. 

N 

Prcnt 

Code 

Label 

6 0.1 * 107.620B 
1 0.0 * 13906 
1 0.0 * 171.2A 
1 0.0 * 171.2B 
1 0.0 * 172.201D 
1 0.0 * 172.202A1 
1 0.0 * 172.202A3 
1 0.0 * 172.202A4 
1 0.0 * 172.203A 
1 0.0 * 172.304A4 
------------------------------
193 4.5 * 396.3A1BA

14 0.3 * 396.3A1BC 
1 0.0 * 396.3A1BD 
21 0.5 * 396.3A1BL 
22 0.5 * 396.3A1T 
25 0.6 * 396.5 
39 0.9 * 396.5B 
2 0.0 * 396.7 
1 0.0 * 397.3 
2 0.0 * 399.207 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Format 

Type 

Length

Variable Name 

$80 

Char 

80

ViolDesc 

Definition: Provides a description of each type of violation received by this driver. 
N 

Prcnt 

Code 

Label 

64 1.5 * 10 hour rule violation 
15 0.3 * 15 hour rule violation 
3 0.1 * 15,20,70/80 hours of service violations (AK) 
16 0.4 * 60/70 hour rule violation 
1 0.0 * Adj axle locking pin missing/disengaged 
5 0.1 * Air suspension pressure loss 
52 1.2 * Axle positioning parts defective/missing 
1 0.0 * Bolts securing cab broken/loose/missing 
LTCCS Codebook MCMISviolation Data Set  219 


Codebook  MCMISviolation Data Set 

N 

Prcnt 

Code 

Label 

33 0.8 * Brake connections with leaks/constrictions 
9 0.2 * Brake hose/tube connection 
------------------------------
2 0.0 * Unsafe operations forbidden 
4 0.1 * Use of vision reducing matter on windows 
15 0.3 * Using or equiping a CMV with radar detector 
2 0.0 * Vehicle access requirements violations 
5 0.1 * Vehicle not placarded as required 
1 0.0 * Violating airbrake restriction 
33 0.8 * Wheel fasteners loose and/or missing 
22 0.5 * Wheel/rim cracked or broken 
11 0.3 * Windshield wipers inoperative/defective 
1 0.0 * Wrong or no id number 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

LTCCS Codebook MCMISviolation Data Set  220 


Codebook  NonMotorists Data Set 

NonMotorists Data Set 

The NonMotorists data set contains information on nonmotorists who were involved in the crash. 
One record is stored for each nonmotorist. 

The NonMotorists data set contains the variables CaseID, PSU, PSUStrat, RATWeight, and 
NonMotoristNumber. NonMotoristNumber is assigned to each non-motorist (i.e., pedestrian, pedal 
cyclist, etc.) involved in the crash. CaseID and NonMotoristNumber uniquely identify each record in 
this data set and should be used to merge the NonMotorists data set with the crash data set. 

Format 

Type 

Length

Variable Name 

BEST8 

Numeric 

8

ANMAge 

Definition: Establishes the nonmotorists age at the time of the crash. Age is recorded with respect 
to the nonmotorists last birthday. 

N 

Prcnt 

Code 

Label 

2 3.8 1 1 

1 1.9 2 2 

1 1.9 3 3 

2 3.8 5 5 

1 1.9 6 6 

1 1.9 14 14 

1 1.9 16 16 

1 1.9 18 18 

1 1.9 19 19 

1 1.9 20 20 

2 3.8 21 21 

2 3.8 23 23 

1 1.9 24 24 

2 3.8 25 25 

1 1.9 26 26 

1 1.9 28 28 

3 5.7 31 31 

1 1.9 32 32 

3 5.7 34 34 

1 1.9 40 40 

1 1.9 41 41 

1 1.9 43 43 

2 3.8 44 44 

1 1.9 45 45 

1 1.9 46 46 

1 1.9 47 47 

1 1.9 48 48 

1 1.9 49 49 

2 3.8 50 50 

2 3.8 52 52 

LTCCS Codebook NonMotorists Data Set  221 


Codebook  NonMotorists Data Set 

N 

Prcnt 

Code 

Label 

2 3.8 56 56 

1 1.9 59 59 

1 1.9 61 61 

2 3.8 62 62 

1 1.9 67 67 

1 1.9 68 68 

1 1.9 69 69 

1 1.9 70 70 

1 1.9 73 73 

Format 

Type 

Length

Variable Name 

OT28F 

Numeric 

8

ANMHeight 

Definition: Establishes the height of the nonmotorist, recorded in centimeters. 
N 

Prcnt 

Code 

Label 

1 1.9 122 122 

1 1.9 137 137 

1 1.9 152 152 

3 5.7 157 157 

1 1.9 163 163 

6 11.3 165 165 

1 1.9 166 166 

6 11.3 168 168 

3 5.7 170 170 

1 1.9 173 173 

5 9.4 175 175 

2 3.8 178 178 

1 1.9 180 180 

5 9.4 183 183 

2 3.8 185 185 

1 1.9 191 191 

1 1.9 203 203
12 22.6 9999 Unknown 

LTCCS Codebook NonMotorists Data Set  222 


Codebook  NonMotorists Data Set 

Format 

Type 

Length

Variable Name 

OT28F 

Numeric 

8

ANMWeight 

Definition: Establishes the weight of the nonmotorist, recorded in kilograms. 
N 

Prcnt 

Code 

Label 

1 1.9 22 22 

1 1.9 34 34 

1 1.9 41 41 

1 1.9 54 54 

1 1.9 57 57 

2 3.8 59 59 

2 3.8 61 61 

1 1.9 62 62 

2 3.8 64 64 

2 3.8 66 66 

2 3.8 68 68 

1 1.9 71 71 

1 1.9 72 72 

1 1.9 74 74 

2 3.8 75 75 

2 3.8 77 77 

1 1.9 79 79 

1 1.9 82 82 

1 1.9 83 83 

2 3.8 84 84 

1 1.9 85 85 

2 3.8 86 86 

1 1.9 88 88 

1 1.9 91 91 

1 1.9 93 93 

1 1.9 95 95 

1 1.9 103 103 

1 1.9 104 104 

1 1.9 106 106 

1 1.9 109 109 

1 1.9 114 114 

1 1.9 116 116 

1 1.9 118 118
11 20.8 9999 Unknown 

LTCCS Codebook NonMotorists Data Set  223 


Codebook  NonMotorists Data Set 

Variable Name 
ANMGender 
Format 
ML1052F 
Type 
Numeric 
Length 
8 
Definition: Reports the gender of the nonmotorist. 
N Prcnt Code Label 
38 71.7 1 Male 
15 28.3 2 Female - not reported pregnant 
Variable Name 
ANMType 
Format 
ML1055F 
Type 
Numeric 
Length 
8 
Definition: Establishes the specific type of nonmotorist involved in the crash. 
N Prcnt Code Label 
44 83.0 0 Pedestrian 
7 13.2 1 Pedal cyclist 
2 3.8 3 Other (specify) 
Variable Name 
ANMPosition 
Format 
ML1050F 
Type 
Numeric 
Length 
8 

Definition: Describes the nonmotorists vertical orientation just prior to the nonmotorists first 
avoidance action. If there was no avoidance action, this variable represents the nonmotorists vertical 
orientation just prior to first impact. Individuals who are standing in a stationary position, walking, or 
running are all classified as standing. 

N 

Prcnt 

Code 

Label
28 52.8 1 Standing

2 3.8 2 Crouching 
1 1.9 3 Kneeling 
1 1.9 4 Bending at waist 
1 1.9 6 Sitting 
3 5.7 11 Sitting upright, pedaling/coasting 
5 9.4 88 Other (specify)
12 22.6 99 Unknown 
Variable Name 

Format 

Type 

Length 

ML1048F 

Numeric 

8

Motion 

Definition: Describes the motion of the nonmotorist just prior to the nonmotorists first avoidance 
action. If there was no avoidance action, this respresents the nonmotorists motion just prior to the 
first impact. 

N 

Prcnt 

Code 

Label
16 30.2 0 Not Moving

LTCCS Codebook NonMotorists Data Set  224 


Codebook  NonMotorists Data Set 

N 

Prcnt 

Code 

Label 

8 15.1 1 Walking slowly 
1 1.9 2 Walking rapidly 
6 11.3 3 Running or jogging 
2 3.8 10 Pedaling at a rapid rate 
1 1.9 28 Starting from a stopped position 
1 1.9 30 Jumping 
2 3.8 31 Falling/stumbling/rising 
1 1.9 88 Other (specify) 
15 28.3 99 Unknown 
Format 

Type 

Length

Variable Name 

ML1038F 

Numeric 

8

Action 

Definition: Describes the direction of the nonmotorists motion with respect to the vehicle, prior to 
the first avoidance action. If there was no avoidance action, this variable represents the 
nonmotorists motion with respect to the vehicle, just prior to first impact. 

N 

Prcnt 

Code 

Label
10 18.9 0 Stopped
16 30.2 1 Crossing road, straight

4 7.5 2 Crossing road, diagonally 
2 3.8 4 Moving in road with traffic (straight) 
1 1.9 5 Moving in road with traffic (weaving) 
1 1.9 6 Moving in road against traffic (straight) 
2 3.8 8 Off road, approaching road 
1 1.9 10 Off road, moving parallel 
9 17.0 98 Other (specify) 
7 13.2 99 Unknown 
Variable Name 

Format 

Type 

Length 

ML1042F 

Numeric 

8

Orientation 

Definition: Describes the nonmotorists body orientation with respect to the striking vehicle prior to 
avoidance actions. Facing vehicle indicates the nonmotorists body (chest) is facing the path of 
travel of the striking vehicle (which may be tracking or yawing). 

N Prcnt Code Label 
12 22.6 1 Facing vehicle 
6 11.3 2 Facing away 
14 26.4 3 Left side to vehicle 
5 9.4 4 Right side to vehicle 
1 1.9 8 Other (specify) 
15 28.3 99 Unknown 

LTCCS Codebook NonMotorists Data Set  225 


Codebook  NonMotorists Data Set 

Format 

Type 

LengthVariable Name 

ML1053F 

Numeric 

8 

Definition: Establishes nonmotorist sight impairments. An individual is considered sight impaired if 
the corrected vision level exceeds 20/70 on a standard measurement scale. 

SightImpaired 

N Prcnt Code Label 
28 52.8 0 Not sight impaired 
6 11.3 1 Sight impaired (specify) 
19 35.8 9 Unknown 

Variable Name 

Format 

Type 

Length 

ML1054F 

Numeric 

8

SightRestricted 

Definition: Establishes nonmotorist sight restrictions with respect to the nonmotorists pre-crash 
view of the striking vehicle. Specifically, did the nonmotorist have an unobstructed view regardless of 
whether or not the nonmotorist actually checked for approaching traffic? 

N 

Prcnt 

Code 

Label
41 77.4 0 No sight restrictions

1 1.9 7 Headlight glare 
2 3.8 9 Other Obstruction (specify) 
9 17.0 99 Unknown 
Variable Name 

Format 

Type 

Length 

ML1045F 

Numeric 

8

HearingImpaired 

Definition: Establishes nonmotorist hearing impairments. Total deafness is considered a hearing 
impairment. 

N 

Prcnt 

Code 

Label
26 49.1 0 No hearing impairment

3 5.7 1 Hearing impairment (specify)
24 45.3 9 Unknown 
Format 

Type 

Length

Variable Name 

ML1046F 

Numeric 

8

HearingRestricted 

Definition: Establishes nonmotorist hearing restrictions. This information is important with respect 
to the nonmotorist hearing the approaching vehicle and/or warnings (horn) attempted by the vehicle 
driver. 

N 

Prcnt 

Code 

Label
32 60.4 0 No hearing restrictions

1 1.9 1 Use of radio/cassette/CD 
3 5.7 8 Other (specify)
17 32.1 9 Unknown 
LTCCS Codebook NonMotorists Data Set  226 


Codebook  NonMotorists Data Set 

Variable Name 

Format 

Type 

Length 

ML1043F 

Numeric 

8

Distraction 

Definition: Documents nonmotorist pre-crash distraction as a result of engaging in a variety of 
activities. 

N 

Prcnt 

Code 

Label
11 20.8 0 Not distracted

1 1.9 1 Conversing with another pedal cyclist 
3 5.7 4 Conversing with pedestrian 
1 1.9 7 Talking on cell phone 
1 1.9 11 Looking at other vehicles 
6 11.3 88 Other (specify)
30 56.6 99 Unknown 
Variable Name 

Format 

Type 

Length 

ML1041F 

Numeric 

8

ANMDecision 

Definition: Documents decision errors made by the nonmotorist during the pre-crash phase. 

N 

Prcnt 

Code 

Label
18 34.0 0 No decision error involved

2 3.8 1 Assumed striking vehicle would stop/yield right-of-way 
2 3.8 2 Assumed driver was aware of presence 
1 1.9 4 Misjudged velocity/gap distance of vehicle 
6 11.3 8 Other decision error (specify)
24 45.3 9 Unknown 
Format 

Type 

Length

Variable Name 

ML1051F 

Numeric 

8

RiskTaking 

Definition: Documents pre-crash risk-taking behavior by the nonmotorist. This is a subjective 
evaluation based on the preponderance of evidence. Examples of risk-taking behavior would include 
crossing the street in a mid-block area without the benefit of a defined pedestrian crosswalk and 
associated TCD, crossing against a Dont Walk pedestrian signal warning, and walking in the traffic 
lane. 

N 

Prcnt 

Code 

Label
23 43.4 0 Did not exhibit risk taking behavior
23 43.4 1 Exhibited risk taking behavior (specify)

7 13.2 9 Unknown 
LTCCS Codebook NonMotorists Data Set  227 


Codebook  NonMotorists Data Set 

Format 

Type 

Length

Variable Name 

ML1040F 

Numeric 

8

ANMAvoidance 

Definition: Documents the nonmotorists first pre-crash avoidance action. To be considered an 
avoidance action, the nonmotorist activity must be a conscious or instinctive action and not a 
kinematic response to the impact. 

N 

Prcnt 

Code 

Label
21 39.6 0 No avoidance action

1 1.9 1 Stopped (froze) 
1 1.9 8 Jumped 
1 1.9 10 Turned toward vehicle 
1 1.9 88 Other (specify)
28 52.8 99 Unknown 
Variable Name 

Format 

Type 

Length 

ML1044F 

Numeric 

8

HandsUsed 

Definition: Describes the nonmotorists attempted use of his or her hands in completing the 
avoidance action. The primary categories for attempted hand use are vaulting and bracing. These 
actions may or may not be successful and may or may not be appropriate. The primary factor here is 

nonmotorist intent. 
N Prcnt Code Label 
17 32.1 0 Did not use hands 
1 1.9 8 Other (specify) 
35 66.0 9 Unknown 

Format 

Type 

Length

Variable Name 

ML196F 

Numeric 

8

ANMPARSevCode 

Definition: Represents the police-reported injury severity code for the nonmotorist. 
N 

Prcnt 

Code 

Label 

4 7.5 2 B -Non-incapacitating injury
14 26.4 3 A -Incapacitating injury
35 66.0 4 K - Killed 
LTCCS Codebook NonMotorists Data Set  228 


Codebook  NonMotorists Data Set 

Format 

Type 

Length

Variable Name 

ML196F 

Numeric 

8

ANMRESSevCode 

Definition: Represents the nonmotorists injury severity code, as determined by injury coding and 
case narratives. This code is based on occupant medical records and/or case narratives and may 
differ from the police-reported injury severity code. 

N 

Prcnt 

Code 

Label 

1 1.9 0 O -No injury 
8 15.1 2 B -Non-incapacitating injury
17 32.1 3 A -Incapacitating injury
26 49.1 4 K -Killed
1 1.9 5 U - Injury, severity unknown 
LTCCS Codebook NonMotorists Data Set  229 


Codebook  Occupants Data Set 

Occupants Data Set 

The Occupants data set contains all the information related to each of the occupants in the vehicles 
involved in the crash. Not all occupants in the vehicle are researched in detail, so for many occupant 
records these values are Unknown. This material is provided as one record per occupant. 

The Occupants data set contains the variables CaseID, PSU, PSUStrat, RATWeight, 
VehicleNumber and OccupantNumber. OccupantNumber is assigned to each occupant in a vehicle. 
CaseID, VehicleNumber and OccupantNumber uniquely identify each record in this data set. 
CaseID and VehicleNumber should be used to merge the Occupant data set with vehicle level data 
sets. 

Variable Name 

Format 

Type 

Length 

BEST8 

Numeric 

8

OccupantNumber 

Definition: OccupantNumber is assigned to each occupant in a vehicle. 
N 

Prcnt 

Code 

Label 
2,269 75.3 1 1 
493 16.4 2 2 
135 4.5 3 3 

65 2.2 4 4 

25 0.8 5 5 

11 0.4 6 6 

5 0.2 7 7 

3 0.1 8 8 

3 0.1 9 9 

3 0.1 10 10 

2 0.1 11 11 

Format 

Type 

Length

Variable Name 

OT28F 

Numeric 

8

OCCAge 

Definition: Documents the age of the occupant at the time of the crash with respect to the 
occupants last birthday. 

N 

Prcnt 

Code 

Label 

8 0.3 0 0 

9 0.3 1 1 

8 0.3 2 2 

11 0.4 3 3 

16 0.5 4 4 

9 0.3 5 5 

11 0.4 6 6 

11 0.4 7 7 

11 0.4 8 8 

7 0.2 9 9 

LTCCS Codebook Occupants Data Set  230 


Codebook  Occupants Data Set 

N 

Prcnt 

Code 

Label 
-------------------------------

5 0.2 82 82 

4 0.1 83 83 

3 0.1 85 85 

1 0.0 86 86 

2 0.1 87 87 

1 0.0 88 88 

1 0.0 89 89 

2 0.1 90 90 

1 0.0 92 92 

42 1.4 9999 Unknown 

Variable Name 

Format 

Type Length 

OT28F 

Numeric 

8

OCCHeight 

Definition: Documents the height of the occupant to the nearest centimeter. 
N 

Prcnt 

Code 

Label 

1 0.0 58 58 

2 0.1 61 61 

2 0.1 64 64 

2 0.1 66 66 

1 0.0 69 69 

1 0.0 71 71 

4 0.1 76 76 

1 0.0 79 79 

1 0.0 81 81 

1 0.0 84 84 
-------------------------------
147 4.9 185 185
116 3.8 188 188

50 1.7 191 191 

33 1.1 193 193 

14 0.5 196 196 

6 0.2 198 198 

2 0.1 201 201 

2 0.1 203 203 

1 0.0 206 206
475 15.8 9999 Unknown 

LTCCS Codebook Occupants Data Set  231 


Codebook  Occupants Data Set 

Format 

Type 

Length

Variable Name 

OT28F 

Numeric 

8

OCCWeight 

Definition: Documents the weight of the occupant to the nearest kilogram.
N 

Prcnt 

Code 

Label 

1 0.0 6 6 

2 0.1 8 8 

4 0.1 9 9 

3 0.1 11 11 

1 0.0 12 12 

2 0.1 13 13 

4 0.1 14 14 

4 0.1 15 15 

7 0.2 16 16 
-------------------------------

3 0.1 17 17 

2 0.1 171 171 

2 0.1 172 172 

2 0.1 175 175 

2 0.1 177 177 

1 0.0 181 181 

1 0.0 193 193 

1 0.0 200 200 

1 0.0 204 204 

1 0.0 254 254
488 16.2 9999 Unknown 

Format 

Type 

Length

Variable Name 

ML87F 

Numeric 

8

OCCGender 

Definition: Identifies the gender of the occupant and includes information regarding pregnancy. 
N 

Prcnt 

Code 

Label 
2,272 75.4 1 Male 
685 22.7 2 Female, not reported pregnant 

10 0.3 3 Female, pregnant -1st trimester (1st-3rd month) 

6 0.2 4 Female, pregnant -2nd trimester (4th-6th month) 

7 0.2 5 Female, pregnant -3rd trimester (7th-9th month) 

1 0.0 6 Female, pregnant -term unknown 

33 1.1 9 Unknown 

LTCCS Codebook Occupants Data Set  232 


Codebook  Occupants Data Set 
Variable Name Format Type Length 
Role ML88F Numeric 8 

Definition: Describes the role of the occupant within the vehicle  driver or passenger. 

N Prcnt Code Label 
2,258 74.9 1 Driver 
742 24.6 2 Passenger 
14 0.5 9 Unknown 

Format 

Type 

Length

Variable Name 

ML273F 

Numeric 

8

Race 

Definition: Represents the occupants self-identification of his/her race or ethnic origin. 
Self-identification represents self-classification by people according to the race with which they 
identify themselves.

N 

Prcnt 

Code 

Label 

1,535 50.9 1 White (non-Hispanic) 
345 11.4 2 Black (non-Hispanic) 
360 11.9 3 White (Hispanic) 

17 0.6 4 Black (Hispanic) 
14 0.5 5 American Indian, Eskimo or Aleut 
84 2.8 6 Asian or Pacific Islander 
28 0.9 7 Other (specify)
631 20.9 9 Unknown 
Format 

Type 

Length

Variable Name 

ML184F 

Numeric 

8

EyeWear 

Definition: Documents whether or not the occupant was wearing any type of eyewear, including 
contact lenses, at the time of the crash. 

N 

Prcnt 

Code 

Label 
1,386 46.0 0 No 
530 17.6 1 Eyeglasses/sunglasses 

75 2.5 2 Contact lenses 
5 0.2 3 Contact lenses w/ sunglasses 
1,018 33.8 9 Unknown 
LTCCS Codebook Occupants Data Set  233 


Codebook  Occupants Data Set 

Format 

Type 

Length

Variable Name 

ML186F 

Numeric 

8

AirbagAvail 

Definition: Captures what was documented on the police report regarding the availability and 
functioning of any air bag system. 

N 

Prcnt 

Code 

Label 

1,250 41.5 0 No airbag available
852 28.3 1 Police did not indicate airbag availability/function 
275 9.1 2 Deployed
313 10.4 3 Not deployed

16 0.5 4 Unknown if deployed
308 10.2 9 Police indicated 'unknown' 
Format 

Type 

Length

Variable Name 

ML187F 

Numeric 

8

ParBeltUsed 

Definition: Captures what was documented on the police report regarding occupant use of 
available vehicle restraints (i.e. manual belts, child safety seat, or automatic restraints).

N 

Prcnt 

Code 

Label
434 14.4 0 None Used
140 4.6 1 Police did not indicate belt use

20 0.7 2 Shoulder Belt
111 3.7 3 Lap Belt
1,645 54.6 4 Lap and shoulder belt 
443 14.7 5 Belt used, type not specified 

30 1.0 6 Child safety seat 
4 0.1 8 Other type belt (specify)
187 6.2 9 Police indicated 'unknown' 
Format 

Type 

Length

Variable Name 

ML218F 

Numeric 

8

EjectionType 

Definition: Describes the type of occupant ejection that was involved during the crash sequence. 
Ejection refers to the person being completely or partially thrown from the vehicle as a result of the 
impact or rollover. 

N Prcnt 

Code 

Label 
2,012 66.8 0 No Ejection 

53 1.8 1 Complete Ejection 
49 1.6 2 Partial Ejection 
1 0.0 3 Ejection, unknown degree
899 29.8 9 Unknown 
LTCCS Codebook Occupants Data Set  234 


Codebook  Occupants Data Set 

Format 

Type 

Length

Variable Name 

ML203F 

Numeric 

8

EjectionArea 

Definition: Describes the general area of the vehicle from where the occupant ejection occurred 
during the crash sequence. Ejection refers to the person being completely or partially thrown from the 
vehicle as a result of the impact or rollover. 

N 

Prcnt 

Code 

Label
1,526 50.6 0 No Ejection

9 0.3 1 Windshield 
42 1.4 2 Left Front 
14 0.5 3 Right Front 
3 0.1 4 Left Rear 
4 0.1 5 Right Rear 
6 0.2 6 Rear 
6 0.2 7 Roof 
6 0.2 8 Other area
1,398 46.4 9 Unknown 
Format 

Type 

Length

Variable Name 

ML204F 

Numeric 

8

Medium 

Definition: Describes the component of the vehicle from which the occupant was ejected during the 
crash sequence. Ejection refers to the person being completely or partially thrown from the vehicle as 
a result of the impact or rollover. 

N 

Prcnt 

Code 

Label 
1,526 50.6 0 No Ejection 

18 0.6 1 Door/hatch/tailgate 
1 0.0 2 Non-fixed Roof Structure 
11 0.4 3 Fixed Glazing 
41 1.4 4 Non-fixed Glazing (specify) 
10 0.3 5 Integral Structure 
5 0.2 8 Other medium (specify) 
1,402 46.5 9 Unknown 
Format 

Type 

Length

Variable Name 

ML219F 

Numeric 

8

MediumStatus 

Definition: Describes the status of the component of the vehicle from which the occupant was 
ejected during the crash sequence. This variable represents the status of the component 
immediately prior to the impact. 

N 

Prcnt 

Code 

Label 
1,526 50.6 0 No Ejection 

12 0.4 1 Open 
60 2.0 2 Closed 
LTCCS Codebook Occupants Data Set  235 


Codebook  Occupants Data Set 
N Prcnt Code Label 
11 0.4 3 Integral Structure 
1,405 46.6 9 Unknown 
Variable Name 
MultiEjection 
Format 
ML536F 
Type 
Numeric 
Length 
8 

Definition: Indicates whether or not there were multiple ejections associated with a particular 
vehicle.

N 

Prcnt 

Code 

Label 
3,014 100.0 0 No 

Format 

Type 

Length

Variable Name 

ML89F 

Numeric 

8

Entrapment 

Definition: Documents whether or not the occupant was physically trapped inside the vehicle by an 
integral part of the vehicle (e.g. intruding component). 

N 

Prcnt 

Code 

Label 

2,438 80.9 0 Not trapped/exit not inhibited 
240 8.0 1 Trapped/pinned -mechanically restrained 
145 4.8 2 Could not exit vehicle due to jammed doors, fire, etc (specify) 
191 6.3 9 Unknown 

Format 

Type 

Length

Variable Name 

ML185F 

Numeric 

8

Mobility

Definition: Documents the mobility of the occupant (how the occupant exited the vehicle) after the 
crash. 

N 

Prcnt 

Code 

Label
150 5.0 0 Occupant fatal before removed from vehicle 
127 4.2 1 Removed from vehicle while unconscious or not oriented to time 
284 9.4 2 Removed from vehicle due to perceived serious injuries 
278 9.2 3 Exited vehicle with some assistance

1,596 53.0 4 Exited vehicle under own power 

58 1.9 5 Occupant fully ejected 
10 0.3 8 Removed from vehicle for other reasons (specify)
511 17.0 9 Unknown 
LTCCS Codebook Occupants Data Set  236 


Codebook  Occupants Data Set 
Variable Name 

Format 

Type 

Length 

BEST8 

Numeric 

8

Intrusions 

Definition: Documents the number of vehicle components that intruded into the passenger 
compartment of the vehicle as a result of the crash.

N 

Prcnt 

Code 

Label 
2,814 93.4 0 0 

12 0.4 1 1 

10 0.3 2 2 

19 0.6 3 3 

25 0.8 4 4 

16 0.5 5 5 

11 0.4 6 6 

10 0.3 7 7 

22 0.7 8 8 

8 0.3 9 9 

15 0.5 10 10 

3 0.1 11 11 

5 0.2 12 12 

6 0.2 13 13 

2 0.1 14 14 

11 0.4 15 15 

3 0.1 16 16 

2 0.1 17 17 

6 0.2 18 18 

3 0.1 19 19 

3 0.1 20 20 

2 0.1 21 21 

3 0.1 22 22 

1 0.0 30 30 

1 0.0 31 31 

1 0.0 33 33 

Variable Name 

Format 

Type 

Length 

OT42F 

Numeric 

8

Row

Definition: Identifies in which row in the vehicle the occupant was seated. 
N 

Prcnt 

Code 

Label 
2,687 89.2 1 First row 
197 6.5 2 Second row 

15 0.5 3 Third row 

4 0.1 4 Fourth row 

1 0.0 5 Fifth row 

LTCCS Codebook Occupants Data Set  237 


Codebook  Occupants Data Set 
N Prcnt Code Label 
61 2.0 8 Other 
49 1.6 9 Unknown 
Variable Name 
OCCLocation 
Format 
OT43F 
Type 
Numeric 
Length 
8 

Definition: Identifies in which seat in the vehicle the occupant was located. This variable is used in 
conjunction with the variable Row to determine the exact seating location for a particular occupant. 

N 

Prcnt 

Code 

Label 
2,342 77.7 1 First location 

37 1.2 2 Second location
522 17.3 3 Third location
3 0.1 4 Fourth location 
61 2.0 8 Other position 
49 1.6 9 Unknown 
Variable Name 

Format 

Type 

Length 

ML188F 

Numeric 

8

Posture 

Definition: Describes the occupants last known position in the vehicle just prior to impact. This 
variable is designed to capture those instances where an occupant was not in the usual upright, 
forward-facing seated position prior to the crash. 

N 

Prcnt 

Code 

Label 
1,954 64.8 0 Normal Posture 

22 0.7 2 Lying on or across seat 
2 0.1 3 Kneeling, standing or sitting in front of seat 
3 0.1 4 Sitting Sideways/turned to talk with anoth occ/look out rear 
5 0.2 6 Lying back in a reclined seat position 
7 0.2 7 Bracing with feet or hands on a surface in front of seat 
2 0.1 8 In the lap of another occupant 
16 0.5 10 In a Child Seat 
64 2.1 88 Other posture (specify)
939 31.2 99 Unknown 
Format 

Type 

Length

Variable Name 

ML90F 

Numeric 

8

OCCRestraintType 

Definition: Describes the type of head restraint available for a particular seating position. 

N Prcnt Code Label 
424 14.1 1 No head restraints 
1,173 38.9 2 Integral 

LTCCS Codebook Occupants Data Set  238 


Codebook  Occupants Data Set 
N Prcnt Code Label 
831 27.6 3 Adjustable 
1 0.0 4 Add-on 
585 19.4 9 Unknown 
Variable Name Format Type Length 
RestraintDamage ML260F Numeric 8 

Definition: Describes any type of damage to the head restraint by the occupant at a particular 
seating position. 

N 

Prcnt 

Code 

Label 

142 4.7 1 No head restraints 
2,136 70.9 2 No damage 

113 3.7 3 Damaged during crash 

623 20.7 9 Unknown 

Variable Name 

Format 

Type 

Length 

ML182F 

Numeric 

8

SeatType 

Definition: Describes the type of seat available for a particular occupant position. 
N 

Prcnt 

Code 

Label
778 25.8 1 Bucket
187 6.2 2 Bucket with folding back
185 6.1 3 Bench

31 1.0 4 Bench with separate back cushions 
68 2.3 5 Bench with folding back(s) 
98 3.3 6 Split bench with separate back cushions 
53 1.8 7 Split bench with folding back(s) 
8 0.3 8 Pedestal (i.e., column supported)
169 5.6 9 Box mounted seat (i.e., van type)
894 29.7 10 Other seat type (specify)
543 18.0 99 Unknown 
Format 

Type 

Length

Variable Name 

ML180F 

Numeric 

8

SeatOrientation 

Definition: Describes the orientation (the direction that it is facing) of a particular seat in the vehicle. 

N Prcnt Code Label 
2,419 80.3 1 Forward facing seat 
3 0.1 3 Side facing seat (inward) 
1 0.0 8 Other (specify) 
591 19.6 9 Unknown 

LTCCS Codebook Occupants Data Set  239 


Codebook  Occupants Data Set 
Variable Name Format Type Length 
TrackPosition ML183F Numeric 8 

Definition: Describes the seat position (on its track) at the time of impact.
N 

Prcnt 

Code 

Label
377 12.5 1 Non-adjustable seat track

44 1.5 2 Seat at forward most track position
124 4.1 3 Seat between forward most and middle track positions 
553 18.3 4 Seat at middle track position
275 9.1 5 Seat between middle and rear most track positions 
455 15.1 6 Seat at rear most track position
1,186 39.3 9 Unknown 

Format 

Type 

Length

Variable Name 

ML181F 

Numeric 

8

SeatPerformance 

Definition: Assesses the performance of the seat during the crash sequence. The attributes are 
indications of whether the seat failed or was deformed in any way.

N 

Prcnt 

Code 

Label 
1,959 65.0 1 No seat performance failure(s) 

9 0.3 2 Seat adjusters failed 
4 0.1 3 Seat back folding locks or 'seat back' failed (specify) 
8 0.3 4 Seat track/anchors failed 
90 3.0 5 Deformed by impact of occupant
162 5.4 6 Deformed by passenger compartment intrusion (specify)
17 0.6 7 Combination of above (specify) 
12 0.4 8 Other (specify)
753 25.0 9 Unknown 
Format 

Type 

Length

Variable Name 

ML111F 

Numeric 

8

IntegratedRestraints 

Definition: Indicates whether or not the seat belts associated with a particular seat are an integral 
part of the seat. In other words, the belts are a part of the seat itself. 

N 

Prcnt 

Code 

Label 
2,343 77.7 0 No 

31 1.0 1 Yes
640 21.2 99 Unknown 
LTCCS Codebook Occupants Data Set  240 


Codebook  Occupants Data Set 
Variable Name Format Type Length 
PriorInclination ML179F Numeric 8 

Definition: Describes the pre-crash position of the seat back for a particular seat in the vehicle and 
is relevant only for adjustable (reclining) seat backs. 

N 

Prcnt 

Code 

Label
586 19.4 1 Not Adjustable
736 24.4 2 Upright
871 28.9 3 Slightly Reclined

5 0.2 4 Completely Reclined
816 27.1 9 Unknown 
Format 

Type 

Length

Variable Name 

ML178F 

Numeric 

8

PostInclination 

Definition: Describes the post-impact position of the seat back for a particular seat in the vehicle 
and is relevant only for adjustable (reclining) seat backs. This variable reflects the change in the seat 
back incline position as a result of forces upon it during the crash sequence. 

N 

Prcnt 

Code 

Label
582 19.3 1 Not Adjustable

40 1.3 11 Moved to completely rearward position 
50 1.7 12 Moved to rearward midrange position 
11 0.4 13 Moved to slightly rearward position 
1,472 48.8 14 Retained pre-impact position 
17 0.6 15 Moved to slightly forward position 
11 0.4 16 Moved to forward midrange position 
7 0.2 24 Moved to upright position 
2 0.1 27 Moved to completely forward position
822 27.3 99 Unknown 
Format 

Type 

Length

Variable Name 

ML110F 

Numeric 

8

ChildSeatAvailable 

Definition: Indicates whether or not a particular occupant was seated in a child safety seat. 
N 

Prcnt 

Code 

Label 
2,843 94.3 0 No 

31 1.0 1 Yes
140 4.6 99 Unknown 
LTCCS Codebook Occupants Data Set  241 


Codebook  Occupants Data Set 
Variable Name 

Format 

Type 

Length 

BEST8 

Numeric 

8

AirbagAvailable 

Definition: Identifies whether an airbag was available for a particular seating position. 

N Prcnt Code Label 
1,966 65.2 0 0 
779 25.8 1 1 
269 8.9 9 9 

Variable Name 

Format 

Type 

Length 

ML129F 

Numeric 

8

ManualBeltAvailable 

Definition: Identifies the type of manual belt system available for a particular seating position. 
N 

Prcnt 

Code 

Label
112 3.7 0 None available

9 0.3 1 Belt removed/destroyed 
1 0.0 2 Shoulder Belt 
272 9.0 3 Lap Belt 
2,369 78.6 4 Lap and shoulder belt 

18 0.6 5 Belt available -type unknown 
1 0.0 6 Shoulder (lap destroyed/removed) 
4 0.1 8 Other Belt (specify)
228 7.6 9 Unknown 
Format 

Type 

Length

Variable Name 

ML499F 

Numeric 

8

ManualBeltUsed 

Definition: Documents actual usage of a manual belt at a particular seating position. 
N 

Prcnt 

Code 

Label
647 21.5 0 Not Used/ not available/ removed or destroyed 

2 0.1 1 Inoperative (specify) 
166 5.5 3 Lap Belt 
1,807 60.0 4 Lap and shoulder belt 

6 0.2 5 Belt used -type unknown 
6 0.2 13 Lap w/child safety seat 
18 0.6 14 Lap & shoulder w/child safety seat 
2 0.1 15 Belt w/child seat -type unknown
360 11.9 99 Unknown if belt used 
LTCCS Codebook Occupants Data Set  242 


Codebook  Occupants Data Set 

Format 

Type 

Length

Variable Name 

ML492F 

Numeric 

8

ManualBeltProper 

Definition: Documents if the manual belt system was used as it was intended to be used (as it was 
designed) at a particular seating location. 

N 

Prcnt 

Code 

Label
649 21.5 0 Not equipped/not available/not used
1,256 41.7 1 Used properly

6 0.2 2 Used properly w/child seat 
2 0.1 3 Improper-shoulder worn under arm 
2 0.1 4 Improper-shoulder worn behind back or seat 
4 0.1 6 Improper-lap belt worn on abdomen 
8 0.3 8 Other improper use (specify)
1,082 35.9 9 Unknown
5 0.2 10 Used, unknown if proper 
Format 

Type 

Length

Variable Name 

ML500F 

Numeric 

8

ManualBeltFailure 

Definition: Indicates failure of a manual belt system during the crash sequence, based on physical 
evidence. 

N 

Prcnt 

Code 

Label 
649 21.5 0 None used / Not available 
1,864 61.8 1 No manual belt failure(s) 

1 0.0 5 Other anchorage separated (specify)
500 16.6 9 Unknown 
Format 

Type 

Length

Variable Name 

ML133F 

Numeric 

8

AnchorAdjustment 

Definition: Documents the position of the adjustable upper anchorage point of the manual shoulder 
belt at the time of the crash. 

N 

Prcnt 

Code 

Label 

401 13.3 0 No manual shoulder belt 
1,643 54.5 1 None for manual shoulder belt 

128 4.2 2 In full up position 

126 4.2 3 In mid position 

148 4.9 4 In full down position 

110 3.6 5 Position unknown 

458 15.2 9 Unknown if adjuster present 

LTCCS Codebook Occupants Data Set  243 


Codebook  Occupants Data Set 
Variable Name Format Type Length 
PretensionerAvailable ML1138F Numeric 8 

Definition: Identifies whether or not a seat belt pretensioner is present for a manual belt. 
Pretensioners are designed to take up the slack in the seat belt during a crash of sufficient 
deceleration. When the vehicle is involved in a collision of sufficient force, a microprocessor causes 
current to flow through the seat belt deployment loops to the initiator. Current passing through the 
initiator ignites the material in the canister, producing a rapid generation of gas. The gas produced 
from this reaction deploys the seat belt pretensioners and shortens the seat belt pretensioner height, 
which removes all of the slack in the seat belts. The seat belt pretensioners will deploy immediately 
before the frontal initiator (air bag) modules deploy. 

N 

Prcnt 

Code 

Label 

1 0.0 1 Not reinstalled
784 26.0 2 None present
8 0.3 3 Present 
2,221 73.7 9 Unknown 
Format 

Type 

Length

Variable Name 

ML1136F 

Numeric 

8

PretensionerActuated 

Definition: Documents whether or not a manual seat belt pretensioner activated during the crash. 

N Prcnt Code Label 
191 6.3 0 No 
1 0.0 1 Yes 
2,822 93.6 9 Unknown 

Variable Name 

Format 

Type 

Length 

OT36F 

Numeric 

8

PretensionerTravel 

Definition: Documents the distance (in millimeters) the pretensioner moved from its original position 

during the crash. 
N Prcnt Code Label 
3,014 100.0 999 Unknown 

Format 

Type 

Length

Variable Name 

ML1200F 

Numeric 

8

Retractor 

Definition: Describes the type of retractor associated with a particular seat belt. Retractors wind up 
the loose webbing of the unused 3-point safety belt, take up the slack, and provide slight tension on 
belts that are in use. 

N 

Prcnt 

Code 

Label
178 5.9 0 None Present
221 7.3 1 Emergency Locking Retractor (ELR)

2 0.1 2 Automatic Locking Retractor 
LTCCS Codebook Occupants Data Set  244 


Codebook  Occupants Data Set 

N 

Prcnt 

Code 

Label 

19 0.6 3 Switchable Retractor in ELR Mode 
3 0.1 4 Switchable Retractor in ALR Mode 
2 0.1 5 Switchable Retractor-Unknown Mode
2,589 85.9 9 Unknown Retractor Type 
Variable Name 

Format 

Type 

Length 

ML493F 

Numeric 

8

ManualBeltSource 

Definition: Documents from where the researcher obtained the preponderance of information to 
make the determination that the manual belt system was used. 

N 

Prcnt 

Code 

Label 
120 4.0 0 Not Equipped/Not Available/Destroyed or Rendered Inoperative 
2,249 74.6 1 Vehicle Inspection 

21 0.7 2 Official Injury Data
263 8.7 3 Driver/occupant interview
45 1.5 8 Other (specify)
316 10.5 9 Unknown if belt used 
Variable Name 

Format 

Type 

Length 

ML134F 

Numeric 

8

AutoBeltAvailable 

Definition: Identifies the type of automatic belt system available for a particular seating position. 
N 

Prcnt 

Code 

Label 
2,712 90.0 0 Not Equipped/Not Available 

67 2.2 1 Two point automatic belts 
43 1.4 2 Three point automatic belts 
4 0.1 3 Automatic type unknown 
1 0.0 4 Automatic destroyed or rendered inoperative 
187 6.2 9 Unknown 
Format 

Type 

Length

Variable Name 

ML44F 

Numeric 

8

AutoBeltUsed 

Definition: Documents actual usage of an automatic belt at a particular seating position.
N 

Prcnt 

Code 

Label 
2,718 90.2 0 Not Equipped/Not Available/destroyed or rendered inoperative 

92 3.1 1 Automatic belt in use 
10 0.3 2 Not in use (manually disconnected, motorized track inoperative) 
10 0.3 3 Automatic belt use unknown
184 6.1 9 Unknown 
LTCCS Codebook Occupants Data Set  245 


Codebook  Occupants Data Set 
Variable Name Format Type Length 
BeltMotorized ML7F Numeric 8 

Definition: Indicates whether the automatic belt system is motorized or non-motorized.
N 

Prcnt 

Code 

Label 
2,697 89.5 0 Not Equipped/Not Available 

51 1.7 1 Non-motorized system 
61 2.0 2 Motorized system
205 6.8 9 Unknown 
Format 

Type 

Length

Variable Name 

ML135F 

Numeric 

8

AutoBeltProper 

Definition: Documents if the automatic belt system was used as it was intended to be used (as it 
was designed) at a particular seating location. 

N 

Prcnt 

Code 

Label 
2,728 90.5 0 Not Equipped/Not Available/Not Used 

62 2.1 1 Used properly 
1 0.0 8 Other improper use (specify)
223 7.4 9 Unknown 
Variable Name 

Format 

Type 

Length 

ML502F 

Numeric 

8

AutoBeltFailure 

Definition: Indicates failure of an automatic belt system during the crash sequence, based on 
physical evidence. 

N 

Prcnt 

Code 

Label 
2,728 90.5 0 Not Equipped/Not Available/Not In Use 

85 2.8 1 No automatic belt failure(s) 
1 0.0 4 Upper anchorage separated 
1 0.0 8 Other automatic belt failure (specify)
199 6.6 9 Unknown 
Variable Name 

Format 

Type 

Length 

ML494F 

Numeric 

8

AutoBeltSource 

Definition: Documents from where the researcher obtained the preponderance of information to 
make the determination that the automatic belt system was used. 

N Prcnt Code Label 
2,702 89.6 0 Not Equipped/Not Available/Destroyed or Rendered Inoperative 
100 3.3 1 Vehicle Inspection 
6 0.2 3 Driver/occupant interview 

LTCCS Codebook Occupants Data Set  246 


Codebook  Occupants Data Set 

N 

Prcnt 

Code 

Label 

4 0.1 8 Other (specify)
202 6.7 9 Unknown if belt used 
Variable Name 

Format 

Type 

Length 

ML196F 

Numeric 

8

OCCInjSeverityCode 

Definition: Identifies the police-reported injury severity for a particular occupant. 

N 

Prcnt 

Code 

Label 

1,168 38.8 0 O -No injury 
434 14.4 1 C -Possible injury 
602 20.0 2 B -Non-incapacitating injury 
439 14.6 3 A -Incapacitating injury 
248 8.2 4 K -Killed 

24 0.8 5 U -Injury, severity unknown 
3 0.1 6 Died prior to crash 
96 3.2 9 Unknown 
Format 

Type 

Length

Variable Name 

ML195F 

Numeric 

8

Mortality

Definition: Documents whether or not the occupant died as a result of the crash (either due to 
injuries received during the crash or due to a physical incapacitation that led to the crash). 

N 

Prcnt 

Code 

Label 
2,706 89.8 0 Not Fatal 
250 8.3 1 Fatal 

12 0.4 2 Fatal -ruled disease (specify) 
46 1.5 9 Unknown 
Variable Name 

Format 

Type 

Length 

ML194F 

Numeric 

8

InitialTreatment 

Definition: Describes the type of medical treatment an occupant received as a result of the crash. 
N 

Prcnt 

Code 

Label 
1,366 45.3 0 No treatment 

41 1.4 1 Dead on Arrival (DOA) at hospital 
38 1.3 2 Dead prior to Admission
452 15.0 3 Hospitalization
846 28.1 4 Transported and released
23 0.8 5 Treatment at scene -non-transported 
57 1.9 6 Treatment later 
92 3.1 7 Transported to a medical facility-unknown if treated 
LTCCS Codebook Occupants Data Set  247 


Codebook  Occupants Data Set 

N 

Prcnt 

Code 

Label 

4 0.1 8 Treatment -other (specify) 
95 3.2 9 Unknown 
Variable Name 

Format 

Type 

Length 

ML193F 

Numeric 

8

InitialFacility

Definition: Describes the category of medical facility that provided initial treatment to an occupant 
as a result of injuries from the crash. 

N 

Prcnt 

Code 

Label 

1,428 47.4 0 Not treated at a medical facility 
955 31.7 1 Trauma Center 
466 15.5 2 Hospital 

1 0.0 3 Medical clinic 
57 1.9 5 Treatment later at medical facility 
1 0.0 8 Other (specify)
106 3.5 9 Unknown 
Variable Name 

Format 

Type 

Length 

OT41F 

Numeric 

8

HospitalDays 

Definition: Documents the number of days that the occupant was hospitalized (after being 
admitted) in a primary medical care facility. 

N 

Prcnt 

Code 

Label 
2,385 79.1 0 0 
114 3.8 1 1 

56 1.9 2 2 
53 1.8 3 3 
23 0.8 4 4 
23 0.8 5 5 
16 0.5 6 6 
17 0.6 7 7 
13 0.4 8 8 
9 0.3 9 9 
12 0.4 10 10 
8 0.3 11 11 
12 0.4 12 12 
3 0.1 13 13 
4 0.1 14 14 
4 0.1 15 15 
2 0.1 16 16 
1 0.0 17 17 
LTCCS Codebook Occupants Data Set  248 


Codebook  Occupants Data Set 

N 

Prcnt 

Code 

Label 

3 0.1 18 18 

5 0.2 19 19 

2 0.1 20 20 

2 0.1 21 21 

3 0.1 22 22 

1 0.0 24 24 

3 0.1 26 26 

3 0.1 27 27 

1 0.0 28 28 

1 0.0 32 32 

1 0.0 35 35 

3 0.1 37 37 

1 0.0 39 39 

1 0.0 43 43 

1 0.0 44 44 

1 0.0 46 46 

2 0.1 61 61
225 7.5 99 Unknown 

Variable Name 

Format 

Type 

Length 

OT41F 

Numeric 

8

WorkDaysLost 

Definition: Documents the actual number of work days lost due to the crash by an employed 
person or a full-time college student. Employed is defined to mean that the occupant was scheduled 
to work at least four hours on each of the days lost. The days lost need not be due to injury. 

N 

Prcnt 

Code 

Label
867 28.8 0 0 
101 3.4 1 1 

75 2.5 2 2 

31 1.0 3 3 

15 0.5 4 4 

41 1.4 5 5 

12 0.4 6 6 

8 0.3 7 7 

4 0.1 8 8 

4 0.1 9 9 

22 0.7 10 10 

3 0.1 11 11 

2 0.1 12 12 

2 0.1 13 13 

9 0.3 14 14 

LTCCS Codebook Occupants Data Set  249 


Codebook  Occupants Data Set 

N 

Prcnt 

Code 

Label 

10 0.3 15 15 

2 0.1 16 16 

1 0.0 19 19 

4 0.1 20 20 

3 0.1 21 21 

2 0.1 22 22 

2 0.1 23 23 

1 0.0 24 24 

2 0.1 25 25 

3 0.1 28 28 

19 0.6 30 30 

1 0.0 35 35 

1 0.0 43 43 

2 0.1 45 45 

6 0.2 60 60 

25 0.8 61 61
661 21.9 88 Not applicable
1,073 35.6 99 Unknown 

Format 

Type 

Length

Variable Name 

$7 

Char 

7

DateOfDeath 

Definition: Identifies the actual date of death for a fatally injured occupant. 
N 

Prcnt 

Code 

Label 

1 0.0 * 2001-01 

6 0.2 * 2001-02 

6 0.2 * 2001-03 

7 0.2 * 2001-04 

6 0.2 * 2001-05 

8 0.3 * 2001-06 

5 0.2 * 2001-07 

5 0.2 * 2001-08 

7 0.2 * 2001-09 

9 0.3 * 2001-10 

7 0.2 * 2001-11 

5 0.2 * 2001-12 

6 0.2 * 2002-01 

14 0.5 * 2002-02 

13 0.4 * 2002-03 

8 0.3 * 2002-04 

6 0.2 * 2002-05 

LTCCS Codebook Occupants Data Set  250 


Codebook  Occupants Data Set 

N 

Prcnt 

Code 

Label 

8 0.3 * 2002-06 
5 0.2 * 2002-07 
12 0.4 * 2002-08 
4 0.1 * 2002-09 
1 0.0 * 2002-10 
13 0.4 * 2002-11 
3 0.1 * 2002-12 
6 0.2 * 2003-01 
6 0.2 * 2003-02 
11 0.4 * 2003-03 
4 0.1 * 2003-04 
10 0.3 * 2003-05 
6 0.2 * 2003-06 
3 0.1 * 2003-07 
10 0.3 * 2003-08 
6 0.2 * 2003-09 
10 0.3 * 2003-10 
5 0.2 * 2003-11 
5 0.2 * 2003-12 
1 0.0 * 2004-09
2,766 91.8 * 9999-99 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Format 

Type 

Length

Variable Name 

$OT26F 

Char 

10

TimeOfDeath 

Definition: Identifies the actual time of death for a fatally injured occupant (military clock time). 
N 

Prcnt 

Code 

Label 

1 0.0 * 00:05 
1 0.0 * 00:30 
1 0.0 * 00:35 
1 0.0 * 00:40 
1 0.0 * 01:07 
2 0.1 * 01:11 
2 0.1 * 01:24 
1 0.0 * 01:31 
1 0.0 * 01:45 
1 0.0 * 01:55 
------------------------------
1 0.0 * 22:20 
1 0.0 * 22:30 
1 0.0 * 22:45 
1 0.0 * 22:52 
LTCCS Codebook Occupants Data Set  251 


Codebook  Occupants Data Set 

N 

Prcnt 

Code 

Label 

1 0.0 * 22:53 
1 0.0 * 23:07 
1 0.0 * 23:17 
1 0.0 * 23:45 
3 0.1 * 23:55
2,793 92.7 99:99 Unknown 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Format 

Type 

Length

Variable Name 

BEST8 

Numeric 

8

InjuryCount 

Definition: Represents the total number of coded injuries (coded by the Zone Center) for a 
particular occupant. 

N 

Prcnt 

Code 

Label 

1,470 48.8 0 0 
307 10.2 
273 9.1 
213 7.1 
171 5.7 
101 3.4 

88 2.9 
57 1.9 
40 1.3 
42 1.4 
31 1.0 
17 0.6 
20 0.7 
20 0.7 
25 0.8 
16 0.5 
12 0.4 
13 0.4 
3 0.1 
16 0.5 
6 0.2 
8 0.3 
5 0.2 
7 0.2 
4 0.1 
7 0.2 
1 0.0 
3 0.1 
LTCCS Codebook Occupants Data Set  252 


Codebook  Occupants Data Set 

N 

Prcnt 

Code 

Label 

3 0.1 28 28 

2 0.1 29 29 

6 0.2 30 30 

4 0.1 31 31 

2 0.1 32 32 

1 0.0 33 33 

1 0.0 34 34 

4 0.1 35 35 

2 0.1 36 36 

2 0.1 38 38 

3 0.1 39 39 

1 0.0 41 41 

3 0.1 42 42 

1 0.0 45 45 

1 0.0 46 46 

1 0.0 47 47 

1 0.0 49 49 

Format 

Type 

Length

Variable Name 

ML108F 

Numeric 

8

GCSScore 

Definition: Documents the actual value of the initial GCS score obtained at a medical facility. The 
Glascow Coma Scale assesses three neurological functions: eye opening, motor response, and 
verbal response. The GCS is taken from medical records. 

N 

Prcnt 

Code 

Label
991 32.9 0 Not Injured
275 9.1 1 Injured -not treated at medical facility
439 14.6 2 No GCS Score at medical facility

18 0.6 3 GCS = 3 

3 0.1 4 GCS = 4 

3 0.1 5 GCS = 5 

4 0.1 6 GCS = 6 

6 0.2 7 GCS = 7 

2 0.1 8 GCS = 8 

1 0.0 9 GCS = 9 

3 0.1 11 GCS = 11 

4 0.1 12 GCS = 12 

9 0.3 13 GCS = 13 

25 0.8 14 GCS = 14
673 22.3 15 GCS = 15
197 6.5 97 Injured, details unknown
361 12.0 99 Unknown if injured 

LTCCS Codebook Occupants Data Set  253 


Codebook  Occupants Data Set 
Variable Name Format Type Length 
UnitsTransfused ML466F Numeric 8 

Definition: Documents the number of blood units given to an occupant for treatment of injuries 
resulting from the crash. 

N 

Prcnt 

Code 

Label 
2,351 78.0 0 No Blood Given 

3 0.1 1 1 Unit given 
13 0.4 2 2 Units given 
3 0.1 3 3 Units given 
10 0.3 4 4 Units given 
1 0.0 5 5 Units given 
3 0.1 6 6 Units given 
1 0.0 8 8 Units given 
1 0.0 9 9 Units given 
16 0.5 10 10 or more Units given 
16 0.5 97 Blood given, # units unknown
596 19.8 99 Unknown if blood given 
Variable Name 

Format 

Type 

Length 

ML109F 

Numeric 

8

ABGTest 

Definition: Documents the reported HCO3 (bicarbonate) value obtained for this occupant. This 
information is found on medical records. 

N 

Prcnt 

Code 

Label 
991 32.9 0 Not Injured 
1,344 44.6 1 Injured, ABG not measured or reported 

8 0.3 2 ABG = 2 
1 0.0 9 ABG = 9 
1 0.0 12 ABG = 12 
1 0.0 13 ABG = 13 
1 0.0 14 ABG = 14 
1 0.0 15 ABG = 15 
3 0.1 16 ABG = 16 
1 0.0 17 ABG = 17 
5 0.2 18 ABG = 18 
6 0.2 19 ABG = 19 
7 0.2 20 ABG = 20 
5 0.2 21 ABG = 21 
10 0.3 22 ABG = 22 
11 0.4 23 ABG = 23 
7 0.2 24 ABG = 24 
LTCCS Codebook Occupants Data Set  254 


Codebook  Occupants Data Set 

N 

Prcnt 

Code 

Label 

7 0.2 25 ABG = 25 

5 0.2 26 ABG = 26 

2 0.1 27 ABG = 27 

7 0.2 28 ABG = 28 

2 0.1 29 ABG = 29 

5 0.2 30 ABG = 30 

1 0.0 32 ABG = 32 

1 0.0 33 ABG = 33 

14 0.5 96 ABG reported, HCO3 unknown 
206 6.8 97 Injured, details unknown 
361 12.0 99 Unknown if injured 

LTCCS Codebook Occupants Data Set  255 


Codebook  Overview Data Set 

Overview Data Set 

The Overview data set contains a summary of factors coded to each vehicle involved in the crash. 
Data from select assessment variables in other data sets are provided here. This facilitates analysis 
of factors that may have contributed to the crash. However, it is important to note that the presence 
of a particular factor does not necessarily indicate causation. There is one record in the data set for 
each vehicle. 

The Overview data set contains the variables CaseID, PSU, PSUStrat, RATWeight and 
VehicleNumber. CaseID and VehicleNumber uniquely identify each record in this data set and 
should be used to merge the Overview data set with other vehicle level data sets. 

Variable Name 

Format 

Type 

Length 

ML241F 

Numeric 

8

OVEMake 

Definition: This vehicle identifies the vehicle make for this vehicle. 
N 

Prcnt 

Code 

Label 

18 0.8 2 JEEP / KAISER-JEEP 
11 0.5 6 CHRYSLER 
64 2.8 7 DODGE 
28 1.2 9 PLYMOUTH 
2 0.1 10 EAGLE
266 11.6 12 FORD
12 0.5 13 LINCOLN 
23 1.0 14 MERCURY 
16 0.7 18 BUICK 
18 0.8 19 CADILLAC
174 7.6 20 CHEVROLET
17 0.7 21 OLDSMOBILE 
29 1.3 22 PONTIAC 
73 3.2 23 GMC 
10 0.4 24 SATURN 
1 0.0 25 GRUMMAN 
10 0.4 30 VOLKSWAGEN 
3 0.1 32 AUDI 
8 0.4 34 BMW 
57 2.5 35 NISSAN / DATSUN 
85 3.7 37 HONDA 
25 1.1 38 ISUZU 
16 0.7 41 MAZDA 
7 0.3 42 MERCEDES BENZ 
2 0.1 47 SAAB 
6 0.3 48 SUBARU 
96 4.2 49 TOYOTA
100 4.4 51 VOLVO
LTCCS Codebook Overview Data Set  256 


Codebook  Overview Data Set 

N 

Prcnt 

Code 

Label 

30 1.3 52 MITSUBISHI 
3 0.1 53 SUZUKI 
11 0.5 54 ACURA 
13 0.6 55 HYUNDAI 
1 0.0 56 MERKUR 
5 0.2 58 INFINITI 
6 0.3 59 LEXUS 
1 0.0 62 LAND ROVER 
6 0.3 63 KIA 
4 0.2 72 HARLEY-DAVIDSON 
2 0.1 73 KAWASAKI 
1 0.0 79 OTHER MAKE MOTORED CYCLE 
1 0.0 80 BROCKWAY 
319 14.0 82 FREIGHTLINER/WHITE 
177 7.7 84 INTERNATIONAL HARVESTER/NAVISTAR 
154 6.7 85 KENWORTH 
159 7.0 86 MACK 
148 6.5 87 PETERBILT 
54 2.4 98 OTHER MAKE (med/heavy truck/bus or "other") 
12 0.5 99 UNKNOWN MANUFACTURER 
Format 

Type 

Length

Variable Name 

BEST8 

Numeric 

8

OVEModel 

Definition: Identifies the vehicle model for this vehicle (with OVEMake). 
N 

Prcnt 

Code 

Label 

14 0.6 1 1 
17 0.7 2 2 
27 1.2 3 3 
6 0.3 4 4 
8 0.4 5 5 
8 0.4 6 6 
7 0.3 7 7 
1 0.0 8 8 
13 0.6 9 9 
3 0.1 10 10 
------------------------------
8 0.4 880 880 
1,062 46.5 881 881 
27 1.2 882 882 
73 3.2 883 883 
LTCCS Codebook Overview Data Set  257 


Codebook  Overview Data Set 

N 

Prcnt 

Code 

Label 

5 0.2 884 884 

5 0.2 890 890 

19 0.8 898 898 

9 0.4 899 899 

7 0.3 988 988 

2 0.1 998 998 

Format 

Type 

Length

Variable Name 

OT28F 

Numeric 

8

OVEYear 

Definition: Establishes the model year that the vehicle was manufactured. 
N 

Prcnt 

Code 

Label 

1 0.0 1957 1957 

1 0.0 1967 1967 

1 0.0 1971 1971 

1 0.0 1972 1972 

1 0.0 1973 1973 

3 0.1 1974 1974 

1 0.0 1975 1975 

5 0.2 1976 1976 

2 0.1 1977 1977 

7 0.3 1978 1978 

13 0.6 1979 1979 

5 0.2 1980 1980 

9 0.4 1981 1981 

8 0.4 1982 1982 

13 0.6 1983 1983 

28 1.2 1984 1984 

35 1.5 1985 1985 

31 1.4 1986 1986 

51 2.2 1987 1987 

60 2.6 1988 1988 

85 3.7 1989 1989 

88 3.9 1990 1990 

70 3.1 1991 1991 

89 3.9 1992 1992 

97 4.2 1993 1993
135 5.9 1994 1994
146 6.4 1995 1995
150 6.6 1996 1996
157 6.9 1997 1997

LTCCS Codebook Overview Data Set  258 


Codebook  Overview Data Set 

N 

Prcnt 

Code 

Label
194 8.5 1998 1998
201 8.8 1999 1999
244 10.7 2000 2000
171 7.5 2001 2001

93 4.1 2002 2002 
64 2.8 2003 2003 
9 0.4 2004 2004 
15 0.7 9999 Unknown 
Format 

Type 

Length

Variable Name 

$OT44F 

Char 

10

OVEConfiguration 

Definition: Provides a summary of the configuration of the rig. Letter codes are strung together 
(listed from left to right) to represent the order of equipment in the rig. For example, a tractor pulling 
two trailers connected by an A-dolly would have a configuration of TSAS. 

N 

Prcnt 

Code 

Label 
1,043 45.7 88 Not a truck 

1 0.0 ISS ISS 
22 1.0 Not Insp Not Insp
309 13.5 R R 
20 0.9 RF RF 
24 1.1 RO RO 
1 0.0 ROO ROO 
29 1.3 T T 
6 0.3 TO TO
773 33.8 TS TS
1 0.0 TSA TSA 
22 1.0 TSAS TSAS 
2 0.1 TSCS TSCS 
29 1.3 TSF TSF 
2 0.1 TSXS TSXS 
Variable Name 

Format 

Type 

Length 

ML657F 

Numeric 

8

Movement 

Definition: Establishes the subject vehicles pre-critical event movement pattern. The pre-event 
movement pattern is usually described as the point that both precedes the critical precrash envelope 
and that precedes vehicle motions that place the involved vehicle(s) on an imminent collision path. 

N 

Prcnt 

Code 

Label 

24 1.1 0 No driver present 
1,141 50.0 1 Going Straight 
155 6.8 2 Decelerating in traffic lane 

LTCCS Codebook Overview Data Set  259 


Codebook  Overview Data Set 

N 

Prcnt 

Code 

Label 

33 1.4 3 Accelerating in traffic lane 
14 0.6 4 Starting in traffic lane 
296 13.0 5 Stopped in traffic lane 
53 2.3 6 Passing or overtaking another vehicle 
3 0.1 7 Disabled or parked in travel lane 
15 0.7 10 Turning right 
36 1.6 11 Turning left 
3 0.1 12 Making a U-turn 
7 0.3 13 Backing up (other than for parking position) 
274 12.0 14 Negotiating a curve 
86 3.8 15 Changing lanes 
17 0.7 16 Merging 
63 2.8 17 Successful avoidance maneuver to a previous critical event 
26 1.1 98 Other (specify) 
38 1.7 99 Unknown 
Variable Name 

Format 

Type 

Length 

ML654F 

Numeric 

8

OVECriticalEvent 

Definition: Identifies the event which made the crash imminent (i.e. something occurred which 
made the collision inevitable). A precrash critical event is coded for each vehicle in the crash and 
documents the circumstances leading to this vehicles first impact in the crash sequence. 

N 

Prcnt 

Code 

Label 

13 0.6 1 Blow out/flat tire, (specify blow out/flat,location/make) 
7 0.3 3 Disabling vehicle failure (e.g, wheel fell off) Specify: 
5 0.2 4 Non-disabling vehicle problem (e.g., hood flew up) Specify: 
16 0.7 5 Poor road conditions(Puddle,pot hole,ice,etc.) Specify: 
122 5.3 6 Traveling too fast for conditions
12 0.5 7 Jacknife Event 
26 1.1 8 Other cause of control loss (specify) 
13 0.6 9 Unknown cause of control loss
131 5.7 10 Over the lane line on left side of travel lane
63 2.8 11 Over the lane line on right side of travel lane 
42 1.8 12 Off the edge of the road on the left side 
83 3.6 13 Off the edge of the road on the right side 
1 0.0 14 End departure 
76 3.3 15 Turning left at intersection 
22 1.0 16 Turning right at interesection 
76 3.3 17 Crossing over (passing through) intersection 
7 0.3 18 This vehicle decelerating
119 5.2 50 Other vehicle stopped
79 3.5 51 Travelling in same direction with low steady speed 
LTCCS Codebook Overview Data Set  260 


Codebook  Overview Data Set 

N 

Prcnt 

Code 

Label 

82 3.6 52 Travelling in same direction while decelerating 
252 11.0 53 Traveling in same direction with higher speed 
30 1.3 54 Traveling in opposite direction 
2 0.1 55 In crossover 
2 0.1 56 Backing 
1 0.0 59 Unknown travel direction of other motor vehicle in lane 
91 4.0 60 From adjacent lane (same direction) -over left lane line 
95 4.2 61 From adjacent lane (same direction -over right lane line 
110 4.8 62 From opposite direction-over left lane line 
2 0.1 63 From opposite direction -over right lane line 
4 0.2 65 From crossing street, turning into same direction 
68 3.0 66 From crossing street, across path 
22 1.0 67 From crossing street ,turning into opposite direction 
2 0.1 70 From driveway,turning into same direction 
4 0.2 71 From driveway, across path 
5 0.2 72 From driveway, turning into oppsite direction 
1 0.0 74 From enterance to limited access highway 
26 1.1 80 Pedestrian in roadway 
1 0.0 81 Pedestrain approaching roadway 
7 0.3 83 Pedalcyclist or other nonmotorist in roadway (specify): 
1 0.0 87 Animal in roadway 
16 0.7 90 Object in roadway 
41 1.8 98 Other (Specify) 
14 0.6 100 Cargo Shift 
492 21.5 125 Not involved first harmful event 
Variable Name 

Format 

Type 

Length 

ML655F 

Numeric 

8

OVEReason 

Definition: Establishes the critical reason for the occurrence of the critical event. The critical reason 
is the immediate reason for this event and is often the last failure in the causal chain (i.e. closest in 
time to the critical precrash event). Although the critical reason is an important part of the description 
of crash events, it is not the cause of the crash nor does it imply the assignment of fault. 

N 

Prcnt 

Code 

Label 
1,229 53.8 0 Critical event not coded to this vehicle 

59 2.6 100 Sleep, that is, actually asleep 
40 1.8 101 Heart attack or other physical impairment of the ability to act 
3 0.1 108 Other critical non-performance (specify) 
6 0.3 109 Unknown critical non-performance 
59 2.6 110 Inattention (i.e., daydreaming) 
43 1.9 111 Internal distraction 
28 1.2 112 External distraction
138 6.0 113 Inadequate surveillance (e.g., failed to look, looked but did not 
LTCCS Codebook Overview Data Set  261 


Codebook  Overview Data Set 

N 

Prcnt 

Code 

Label 

3 0.1 118 Other recognition error (specify) 
53 2.3 119 Unknown recognition error 
69 3.0 120 Too fast for conditions to be able to respond to unexpected 
2 0.1 121 Too slow for traffic stream 
36 1.6 122 Misjudgment of gap or other's speed 
34 1.5 123 Following too closely to respond to unexpected actions 
22 1.0 124 False assumption of other road user's actions 
44 1.9 125 Illegal maneuver 
6 0.3 127 Inadequate evasive action, e.g. braking only, not braking and 
23 1.0 128 Aggressive driving behavior 
20 0.9 138 Other decision error (specify) 
3 0.1 139 Unknown decision error 
63 2.8 140 Too fast for curve/turn 
1 0.0 141 Panic/Freezing 
40 1.8 142 Overcompensation 
38 1.7 143 Poor directional control e.g., failing to control vehicle with skill 
2 0.1 149 Unknown performance error 
98 4.3 199 Type of driver error unknown 
16 0.7 200 Tires/wheels failed 
8 0.4 201 Brakes failed 
1 0.0 202 Steering failed 
17 0.7 203 Cargo shifted 
1 0.0 204 Trailer attachment failed 
2 0.1 205 Suspension failed 
1 0.0 208 Body, doors, hood failed 
2 0.1 298 Other vehicle failure (specify) 
1 0.0 299 Unknown vehicle failures 
1 0.0 500 Signs/signals missing 
1 0.0 504 View obstructed by other vehicles 
1 0.0 505 Road design -roadway geometry (e.g., ramp curvature) 
1 0.0 507 Road design -other 
20 0.9 509 Slick roads (low friction road surface due to ice, loose debris, any 
1 0.0 518 Other highway-related condition (specify) 
1 0.0 522 Fog 
2 0.1 523 Wind gust 
7 0.3 530 Glare 
18 0.8 540 Degraded braking capability 
3 0.1 541 Transmission/engine failure 
17 0.7 999 Unknown reason for critical event 
LTCCS Codebook Overview Data Set  262 


Codebook  Overview Data Set 

Format 

Type 

Length

Variable Name 

ML656F 

Numeric 

8

OVEAvoidance 

Definition: Attempted avoidance maneuvers are movements/actions initiated by the subject driver, 
within the crucial crash envelope, in response to a critical precrash event. Attempted avoidance 
maneuvers occur after the driver has realization of an impending danger. Documents the drivers 
actions initiated in response to the realization of impending danger. 

N 

Prcnt 

Code 

Label 

24 1.1 0 No driver present 
1,219 53.4 1 No avoidance maneuver 
137 6.0 2 Braking (no lockup) 
219 9.6 3 Braking (lockup) 

13 0.6 4 Braking (lockup unknown) 
61 2.7 6 Steering left 
72 3.2 7 Steering right
106 4.6 8 Braking and steering left
128 5.6 9 Braking and steering right
21 0.9 10 Accelerating 
8 0.4 11 Accelerating and steering left 
10 0.4 12 Accelerating and steering right
115 5.0 98 Other action (specify)
151 6.6 99 Unknown 
Format 

Type 

Length

Variable Name 

ML659F 

Numeric 

8

OVEStability

Definition: The purpose of this variable is to assess the stability of the vehicle after the critical event. 
The stability of the vehicle prior to an avoidance action is not considered except in the following 
situation: A vehicle that is out of control (e.g. yawing clockwise) prior to an avoidance maneuver is 
coded Other vehicle loss of control only if an avoidance action was taken in response to an 
impending danger. Thus, the variable focuses upon this vehicles dynamics after the critical event. 

N 

Prcnt 

Code 

Label 

24 1.1 0 No driver present 
1,644 72.0 1 Tracking 
368 16.1 2 Skidding longitudinally->rotation less than 30 degrees 

59 2.6 3 Skidding laterally->clockwise rotation 
72 3.2 4 Skidding laterally->counterclockwise rotation 
47 2.1 8 Other vehicle loss-of-control (specify) 
70 3.1 9 Pre-crash stability unknown 
LTCCS Codebook Overview Data Set  263 


Codebook  Overview Data Set 

Format 

Type 

Length

Variable Name 

ML658F 

Numeric 

8

OVELocation 

Definition: Reports the location of the subject vehicle at the point where its pre-impact stability is 
determined.

N 

Prcnt 

Code 

Label 

24 1.1 0 No driver present 
1,431 62.7 1 Stayed in original travel lane 
521 22.8 2 Stayed on roadway but left original travel lane 

10 0.4 3 Stayed on roadway, not known if left original travel lane 
221 9.7 4 Departed roadway
11 0.5 5 Remained off roadway 
24 1.1 6 Returned to roadway 
13 0.6 7 Entered roadway 
29 1.3 9 Unknown 
Format 

Type 

Length

Variable Name 

ML660F 

Numeric 

8

OVERightOfWay

Definition: Establishes vehicle right-of-way characteristics, from a legal perspective, for the subject 
vehicle. Specifically, did this vehicle have the right-of-way? 

N 

Prcnt 

Code 

Label 

581 25.4 1 Yes 

401 17.6 2 No 
1,295 56.7 88 Not Applicable 

7 0.3 99 Unknown 
Format 

Type 

Length

Variable Name 

OT2F 

Numeric 

8

OVEAccidentType 

Definition: Is used in categorizing the collisions of drivers involved in crashes. A collision is defined 
here as the first harmful event in a crash between a vehicle and some object, accompanied by 
property damage or human injury. The object may be another vehicle, a person, an animal, a fixed 
object, the road surface, or the ground. If the first collision is a rollover, the impact is with the ground 
or road surface. The collision may also involve plowing into soft ground, if severe deceleration results 
in damage or injury. A road departure without damage or injury is not defined as a collision. This 
variable is part of the larger variable Crash Type. The Crash Type variable is actually broken 
down into three components: the crash category, the crash configuration, and the accident type. 
This variable only deals with the configuration of the crash. 

N 

Prcnt 

Code 

Label
115 5.0 1 Right Roadside Departure
562 24.6 2 Rear-End

80 3.5 3 Head-On
118 5.2 4 Turn Across Path
LTCCS Codebook Overview Data Set  264 


Codebook  Overview Data Set 

N 

Prcnt 

Code 

Label 
144 6.3 5 Straight Paths 
104 4.6 6 Same Trafficway Opposite Directions -Sideswipe/Angle 
101 4.4 7 Left Roadside Departure 

5 0.2 8 Same Trafficway Same Direction -Forward Impact 
10 0.4 9 Same Trafficway Opposite Directions -Forward Impact 
88 3.9 10 Turn Into Path 
46 2.0 11 Single Driver -Forward Impact 
268 11.7 12 Same Trafficway Same Direction -Sideswipe/Angle 
643 28.2 13 Miscellaneous 
Format 

Type Length

Variable Name 

BEST8 

Numeric 

8

OVECrashCode 

Definition: Is used in categorizing the collisions of drivers involved in crashes. A collision is defined 
here as the first harmful event in a crash between a vehicle and some object, accompanied by 
property damage or human injury. The object may be another vehicle, a person, an animal, a fixed 
object, the road surface, or the ground. If the first collision is a rollover, the impact is with the ground 
or road surface. The collision may also involve plowing into soft ground, if severe deceleration results 
in damage or injury. A road departure without damage or injury is not defined as a collision. This 
variable encompasses the Crash Configuration variable, which is a component of this variable. 

N 

Prcnt 

Code 

Label 

18 0.8 0 0 
65 2.8 1 1 
43 1.9 2 2 
6 0.3 3 3 
1 0.0 5 5 
38 1.7 6 6 
54 2.4 7 7 
6 0.3 8 8 
1 0.0 9 9 
2 0.1 10 10 
2 0.1 11 11 
3 0.1 12 12 
32 1.4 13 13 
1 0.0 14 14 
8 0.4 15 15
113 4.9 20 20
106 4.6 21 21
7 0.3 22 22 
1 0.0 23 23 
90 3.9 24 24 
85 3.7 25 25 
2 0.1 26 26 
LTCCS Codebook Overview Data Set  265 


Codebook  Overview Data Set 

N 

Prcnt 

Code 

Label 

2 0.1 27 27 

61 2.7 28 28 

53 2.3 29 29 

1 0.0 30 30 

7 0.3 31 31 

32 1.4 32 32 

2 0.1 33 33 

4 0.2 42 42 

1 0.0 43 43 

7 0.3 44 44 
105 4.6 45 45 

49 2.1 46 46 

53 2.3 47 47 

54 2.4 48 48 

35 1.5 50 50 

35 1.5 51 51 

10 0.4 52 52 

10 0.4 62 62 

45 2.0 64 64 

45 2.0 65 65 

14 0.6 66 66 

38 1.7 68 68 

38 1.7 69 69 

10 0.4 70 70 

10 0.4 71 71 

10 0.4 72 72 

10 0.4 73 73 

2 0.1 74 74 

4 0.2 76 76 

4 0.2 77 77 

5 0.2 78 78 

5 0.2 79 79 

4 0.2 80 80 

4 0.2 81 81 

30 1.3 82 82 

30 1.3 83 83 

2 0.1 84 84 

31 1.4 86 86 

31 1.4 87 87 

38 1.7 88 88 

38 1.7 89 89 

6 0.3 90 90 

7 0.3 92 92 

LTCCS Codebook Overview Data Set  266 


Codebook  Overview Data Set 

N 
4 
614 
Prcnt 
0.2 
26.9 
Code 
93 
98 
Label 
93 
98 
Variable Name 
OVEJackKnife 
Format 
AP1U 
Type 
Numeric 
Length 
8 
Definition: Indicates whether or not a jackknife occurred for this vehicle 
N Prcnt Code Label 
2,223 97.3 0 Absent 
61 2.7 1 Present 
Variable Name 
OVECargoShift 
Format 
AP1U 
Type 
Numeric 
Length 
8 
Definition: Indicates whether or not a cargo shift occurred for this vehicle. 
N Prcnt Code Label 
2,241 98.1 0 Absent 
43 1.9 1 Present 
Variable Name 
OVEAlcohol 
Format 
AP1U 
Type 
Numeric 
Length 
8 

Definition: Indicates whether or not there was any alcohol involvement for this vehicle/driver. 

N Prcnt Code Label 
2,199 96.3 0 Absent 
85 3.7 1 Present 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

AnyDrugsVeh 

Definition: Indicates whether or not any drugs (either legal or illegal) were coded as present for this 

vehicle/driver. 
N Prcnt Code Label 
2,198 96.2 0 Absent 
86 3.8 1 Present 

LTCCS Codebook Overview Data Set  267 


Codebook  Overview Data Set 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

DriverPhysical 

Definition: Indicates whether or not there were any other physical factors coded for this 

vehicle/driver. 
N Prcnt Code Label 
1,520 66.5 0 Absent 
764 33.5 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

DriverFatigue 

Definition: Indicates whether or not the driver in this vehicle was coded as being fatigued at the time 

of the crash. 
N Prcnt Code Label 
2,068 90.5 0 Absent 
216 9.5 1 Present 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

OVERecognition 

Definition: Indicates whether or not any recognition-related factors were coded for this 
vehicle/driver. 

N 

Prcnt 

Code 

Label 
1,803 78.9 0 Absent 
481 21.1 1 Present 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

OVEDecision 

Definition: Indicates whether or not any decision-related factors were coded for this vehicle/driver. 

N Prcnt Code Label 
1,825 79.9 0 Absent 
459 20.1 1 Present 

LTCCS Codebook Overview Data Set  268 


Codebook  Overview Data Set 

Format 

Type 

LengthVariable Name 

AP1U 

Numeric 

8 
Definition: Indicates whether or not any aggression factors were coded for this vehicle/driver. 

Aggression 

N Prcnt Code Label 
2,136 93.5 0 Absent 
148 6.5 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

OVESurveillance 

Definition: Indicates whether or not any surveillance-related factors were coded for this 

vehicle/driver. 
N Prcnt Code Label 
1,807 79.1 0 Absent 
477 20.9 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

EmotionExperience 

Definition: Indicates whether or not there were any emotional or experience-related factors coded 

for this vehicle/driver. 
N Prcnt Code Label 
1,692 74.1 0 Absent 
592 25.9 1 Present 

Format 

Type 

LengthVariable Name 

AP1U 

Numeric 

8

CarrierEmployer 

Definition: Indicates whether or not any carrier or employer factors were coded for this 
vehicle/driver. 

N 

Prcnt 

Code 

Label 
2,191 95.9 0 Absent 

93 4.1 1 Present 
LTCCS Codebook Overview Data Set  269 


Codebook  Overview Data Set 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

Traffic 

Definition: Indicates whether or not any traffic-related factors were coded for this vehicle/driver. 

N Prcnt Code Label 
1,529 66.9 0 Absent 
755 33.1 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

VehicleState 

Definition: Indicates whether or not any vehicle-related factors (deficiencies or malfunctions) were 

coded for this vehicle. 
N Prcnt Code Label 
1,752 76.7 0 Absent 
532 23.3 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

Roadway

Definition: Indicates whether or not any roadway-related factors were coded for this vehicle/driver. 

N Prcnt Code Label 
1,864 81.6 0 Absent 
420 18.4 1 Present 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

Weather 

Definition: Indicates whether or not any weather-related factors were coded for this vehicle/driver. 

N Prcnt Code Label 
1,944 85.1 0 Absent 
340 14.9 1 Present 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

OVEEnvironment 

Definition: Indicates whether or not there were any environmental factors coded for this 

vehicle/driver. 
N Prcnt Code Label 
2,269 99.3 0 Absent 
15 0.7 1 Present 

LTCCS Codebook Overview Data Set  270 


Codebook  Overview Data Set 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

OVESpeed 

Definition: Indicates whether or not any speed-related or gap distance-related factors were coded 

for this vehicle/driver. 
N Prcnt Code Label 
1,811 79.3 0 Absent 
473 20.7 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

NonMotorist 

Definition: Indicates whether or not a nonmotorist was involved in an impact with this vehicle. 

N Prcnt Code Label 
2,229 97.6 0 Absent 
55 2.4 1 Present 

LTCCS Codebook Overview Data Set  271 


Codebook  PARViolations Data Set 

PARViolations Data Set 

The PARViolations data set contains violations filed against the driver as a result of the crash and 
reported on the Police Accident Report. One record of this information is stored for each violation 
charged. 

The PARViolations data set contains the variables CaseID, PSU, PSUStrat, RATWeight, and 
VehicleNumber. CaseID, VehicleNumber and PARViolationCode uniquely identify each record in 
this data set. CaseID and VehicleNumber should be used to merge the PARViolations data set with 
vehicle level data sets. 

Format 

Type 

Length

Variable Name 

BEST8 

Numeric 

8

PARViolationCode 

Definition: Indicates violation of the Vehicle Code as charged by the investigating officer and as 
noted on the police report. 

N 

Prcnt 

Code 

Label 
1,101 56.6 0 0 

11 0.6 1 1 

12 0.6 2 2 

21 1.1 3 3 

55 2.8 4 4 

3 0.2 7 7 

21 1.1 11 11 

3 0.2 12 12 

1 0.1 13 13 

1 0.1 15 15 

5 0.3 19 19 

14 0.7 22 22 

99 5.1 23 23 

2 0.1 24 24 

21 1.1 29 29 

14 0.7 31 31 

1 0.1 33 33 

1 0.1 34 34 

2 0.1 35 35 

2 0.1 36 36 

10 0.5 37 37 

1 0.1 39 39 

3 0.2 42 42 

3 0.2 43 43 

30 1.5 46 46 

1 0.1 48 48 

10 0.5 49 49 

1 0.1 51 51 

LTCCS Codebook PARViolations Data Set  272 


Codebook  PARViolations Data Set 

N 

Prcnt 

Code 

Label 

12 0.6 52 52 

1 0.1 53 53 

24 1.2 58 58 

1 0.1 59 59 

33 1.7 61 61 

6 0.3 62 62 

2 0.1 63 63 

10 0.5 69 69 

19 1.0 71 71 

18 0.9 72 72 

77 4.0 73 73 

15 0.8 74 74 

15 0.8 75 75 

19 1.0 76 76 

11 0.6 79 79 

27 1.4 81 81 

79 4.1 82 82 

16 0.8 83 83 

23 1.2 86 86 

65 3.3 89 89 

1 0.1 92 92 

1 0.1 93 93 

10 0.5 98 98 

11 0.6 99 99 

Variable Name 

Format 

Type 

Length 

$100 

Char 

100

PARDescription 

Definition: Describes the violations charged to the driver as indicated on the police report. 
N 

Prcnt 

Code 

Label 

5 0.3 * Alcohol, drug or impairment violations, generally 

79 4.1 * Brake violations 

2 0.1 * Certain traffic to use right lane (trucks, slow-moving, etc.) 

77 4.0 * Commercial driver violations (log book, hours, permits carried) 

12 0.6 * Driving on left, wrong side of road, generally 

19 1.0 * Driving uninsured vehicle 

1 0.1 * Driving where prohibited (sidewalk, limited access, off truck 

3 0.2 * Driving while impaired 

21 1.1 * Driving while intoxicated(alco/drug) or BAC above limit(any 

19 1.0 * Driving while license withdrawn (including violation of work 

1 0.1 * Driving while under influence of substance not intended to 

LTCCS Codebook PARViolations Data Set  273 


Codebook  PARViolations Data Set 

N 

Prcnt 

Code 

Label 

1 0.1 * Driving wrong way on one-way road 
1 0.1 * Enter intersection, when space insufficient 
65 3.3 * Equipment violations, generally 
2 0.1 * Exceeding special speed limit(e.g.:for trucks, buses, bridge, 
15 0.8 * Failure to carry insurance card 
1 0.1 * Failure to obey flashing signal (yellow or red) 
2 0.1 * Failure to obey signal, generally 
10 0.5 * Failure to obey stop sign 
1 0.1 * Failure to obey traffic control device, generally 
16 0.8 * Failure to require restraint use (by self or passengers) 
3 0.2 * Failure to signal for turn or stop 
14 0.7 * Failure to stop for red signal 
30 1.5 * Failure to yield, generally 
24 1.2 * Following too closely 
3 0.2 * Hit-and-run, failure to stop after accident 
1 0.1 * Illegal possession of alcohol or drugs 
3 0.2 * Improper method & position of turn (too wide, wrong lane) 
6 0.3 * Improper use of lane (center of 3-lane road, HOV designed lane) 
1 0.1 * Improper, unsafe passing 
55 2.8 * Inattentive, careless, improper driving 
27 1.4 * Lamp violations 
10 0.5 * Lane violations, generally 
11 0.6 * Manslaughter or homicide 
11 0.6 * Non-moving violations, generally
1,101 56.6 * None
18 0.9 * Other driver license violations 
10 0.5 * Other moving violation (coasting, backing, opening door) 
23 1.2 * Size, weight, load violations 
99 5.1 * Speed greater than reasonable & prudent (not necessarily over 
21 1.1 * Speed related, violations, generally 
14 0.7 * Speeding (above the speed limit) 
1 0.1 * Theft, unauthorized use of motor vehicle 
10 0.5 * Turn, yield, signaling violations, generally 
11 0.6 * Unknown VIOLATION 
33 1.7 * Unsafe or prohibited lane change 
21 1.1 * Unsafe reckless (not willful, wanton reckless) driving 
15 0.8 * Vehicle registration violations 
2 0.1 * Violate RR grade crossing device/regulations 
1 0.1 * Violation of turn on red (failure to stop & yield to pedestrians 
12 0.6 * Willful reckless driving, driving to endanger, negligent driving 
1 0.1 * Wrong side, passing, following violations, generally 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

LTCCS Codebook PARViolations Data Set  274 


Codebook  SaferAuthorityStatus Data Set 

SaferAuthorityStatus Data Set 

The SaferAuthorityStatus data set includes information on the insurance licensing authority for the 
drivers carrier. This material is imported from the FMCSA Safety and Fitness Electronic Records 
(SAFER) database and is provided as one record per vehicle/driver for which this carrier information 
is available. 

The SaferAuthorityStatus data set contains the variables CaseID, PSU, PSUStrat, RATWeight, and 
VehicleNumber. CaseID and VehicleNumber uniquely identify each record in this data set and 
should be used to merge the SaferAuthorityStatus data set with vehicle level data sets. 

Format 

Type 

Length

Variable Name 

$20 

Char 

20

CommonStatus 

Definition: Describes the standing of the common carrier certificate (operating authority). 
N 

Prcnt 

Code 

Label
342 56.5 * ACTIVE

51 8.4 * INACTIVE
189 31.2 * NONE
23 3.8 * UNK 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Variable Name 

Format 

Type 

Length 

$20 

Char 

20

ContractStatus 

Definition: Describes the standing of the contract carrier permit (operating authority).
N 

Prcnt 

Code 

Label
456 75.4 * ACTIVE

38 6.3 * INACTIVE
88 14.5 * NONE
23 3.8 * UNK 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Variable Name 

Format 

Type 

Length 

$20 

Char 

20

BrokerStatus 

Definition: Describes the standing of the broker license (operating authority).
N 

Prcnt 

Code 

Label 

13 2.1 * ACTI
119 19.7 * ACTIVE
3 0.5 * INAC 
34 5.6 * INACTIVE
413 68.3 * NONE
23 3.8 * UNK 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 
LTCCS Codebook SaferAuthorityStatus Data Set  275 


Codebook  SaferCarrier Data Set 

SaferCarrier Data Set 

The SaferCarrier data set contains information on the operations of the drivers carrier from the 
FMCSA SAFER database. This material is provided as one record per vehicle/driver for which this 
carrier information is available. 

The SaferCarrier data set contains the variables CaseID, PSU, PSUStrat, RATWeight, and 
VehicleNumber. CaseID and VehicleNumber uniquely identify each record in this data set and 
should be used to merge the SaferCarrier data set with vehicle level data sets. 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

AuthorizedForHire 

Definition: A commercial entity whose primary business activity is the transportation of property or 
passengers by motor vehicle for compensation. 

N 

Prcnt 

Code 

Label
225 28.3 0 Absent
571 71.7 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

ExemptForHire 

Definition: A for-hire entity transporting commodities or conducting operations not subject to 
economic regulation by the Interstate Commerce Commission. 

N Prcnt Code Label 
761 95.6 0 Absent 
35 4.4 1 Present 

Format 

Type 

LengthVariable Name 

AP1U 

Numeric 

8

PrivateProperty

Definition: An entity whose highway transportation activities are incidental to, and in furtherance of, 
its primary business activity. 

N 

Prcnt 

Code 

Label 
598 75.1 0 Absent 
198 24.9 1 Present 

LTCCS Codebook SaferCarrier Data Set  276 


Codebook  SaferCarrier Data Set 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8 

Definition: A private entity engaged in the interstate transportation of passengers which is provided 
in the furtherance of a commercial enterprise and is not available to the public at large. 
N 

PrivatePassengersBusiness 

Prcnt 

Code 

Label
796 100.0 0 Absent 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

PrivatePassengersNonBusiness

Definition: A private entity engaged in the interstate transportation of passengers that does not 
otherwise meet the definition of a private entity transporting passengers (business) (e.g. church 

buses). 
N Prcnt Code Label 
796 100.0 0 Absent 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

Migrant 

Definition: An entity who transports in interstate or foreign commerce at any one time, three or more 
migrant workers to or from their employment (refers to contract carrier by motor vehicle). 

N 

Prcnt 

Code 

Label
796 100.0 0 Absent 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

USMail 

Definition: An entity which transports U.S. Mail. 
N Prcnt Code Label 
780 98.0 0 Absent 
16 2.0 1 Present 
Variable Name 
FederalGovernment 
Format 
AP1U 
Type 
Numeric 
Length 
8 

Definition: Transportation of property or passengers by a U.S. Federal Government Agency. 

N Prcnt Code Label 
794 99.7 0 Absent 
2 0.3 1 Present 

LTCCS Codebook SaferCarrier Data Set  277 


Codebook  SaferCarrier Data Set 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

StateGovernment 

Definition: Transportation of property or passengers by a U.S. State Government Agency. 

N Prcnt Code Label 
794 99.7 0 Absent 
2 0.3 1 Present 

Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

LocalGovernment 

Definition: Transportation of property or passengers by a local municipality. 
N Prcnt Code Label 
794 99.7 0 Absent 
2 0.3 1 Present 
Variable Name 
IndianTribe 
Format 
AP1U 
Type 
Numeric 
Length 
8 
Definition: Transportation of property or passengers by an Indian tribal government. 
N Prcnt Code Label 
795 99.9 0 Absent 
1 0.1 1 Present 
Variable Name 
Other 
Format 
AP1U 
Type 
Numeric 
Length 
8 
Definition: An entity which does not fall into one of the other listed classifications. 
N Prcnt Code Label 
738 92.7 0 Absent 
58 7.3 1 Present 
Variable Name 
Unknown 
Format 
AP1U 
Type 
Numeric 
Length 
8 

Definition: Entity type unknown. 

N Prcnt Code Label 
795 99.9 0 Absent 
1 0.1 1 Present 

LTCCS Codebook SaferCarrier Data Set  278 


Codebook  SaferCarrier Data Set 

Format 

Type 

Length

Variable Name 

$27 

Char 

27

CargoCarried 

Definition: Describes the specific type of cargo hauled by this carrier.
N 

Prcnt 

Code 

Label 

20 2.5 * BEVERAGES 
48 6.0 * BUILDING MATERIALS 
38 4.8 * CHEMICALS 
6 0.8 * COAL, COKE 
29 3.6 * COMMODITIES DRY BULK 
23 2.9 * CONSTRUCTION 
18 2.3 * DRIVE AWAY/TOWAWAY 
5 0.6 * FARM SUPPLIES 
31 3.9 * FRESH PRODUCE 
20 2.5 * GARBAGE, REFUSE, TRASH
92 11.6 * GENERAL FREIGHT
13 1.6 * GRAIN, FEED, HAY 
10 1.3 * HOUSEHOLD GOODS 
26 3.3 * INTERMODAL CONTAINERS 
27 3.4 * LIQUIDS/GASES 
4 0.5 * LIVESTOCK 
37 4.6 * LOGS, POLES, BEAMS, LUMBER 
36 4.5 * MACHINERY, LARGE OBJECTS 
32 4.0 * MEAT 
31 3.9 * METAL; SHEETS, COILS, ROLLS 
4 0.5 * MOBILE HOMES 
12 1.5 * MOTOR VEHICLES 
1 0.1 * OIL FIELD EQUIPMENT
141 17.7 * OTHER
31 3.9 * PAPER PRODUCTS 
2 0.3 * PASSENGERS 
34 4.3 * REFRIGERATED FOOD 
15 1.9 * U.S. MAIL 
8 1.0 * UNKNOWN 
2 0.3 * UTILITY 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

LTCCS Codebook SaferCarrier Data Set  279 


Codebook  SaferCarrier Data Set 

Format 

Type 

Length

Variable Name 

$OT44F 

Char 

20

SCAStatus 

Definition: Describes the status of the carrier in MCMIS (Motor Carrier Management Information 

System). 

N 

Prcnt 

Code 

Label 

1 0.1 99 Unknown
767 96.4 * ACTIVE
28 3.5 * INACTIVE 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Variable Name 

Format 

Type 

Length 

$100 

Char 

100

CarrierOperationDescription 

Definition: Describes the carriers type of operation  it describes where the carrier is allowed to go 
(intrastate vs. interstate). 

N 

Prcnt 

Code 

Label
755 94.8 * INTERSTATE

7 0.9 * INTRASTATE HAZMAT 
32 4.0 * INTRASTATE NON-HAZMAT 
2 0.3 * Unknown 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Variable Name 

Format 

Type 

Length 

OT45F 

Numeric 

8

CountDrivers 

Definition: Documents the number of drivers employed by this carrier. 
N 

Prcnt 

Code 

Label 

2 0.3 0 0 
50 6.3 1 1 
39 4.9 2 2 
26 3.3 3 3 
28 3.5 4 4 
8 1.0 5 5 
18 2.3 6 6 
15 1.9 7 7 
16 2.0 8 8 
11 1.4 9 9 
-----------------------------------
1 0.1 12807 12807 
3 0.4 12912 12912 
1 0.1 13123 13123 
1 0.1 13149 13149 
LTCCS Codebook SaferCarrier Data Set  280 


Codebook  SaferCarrier Data Set 

N 

Prcnt 

Code 

Label 

2 0.3 14424 14424 

1 0.1 17510 17510 

6 0.8 19900 19900 

1 0.1 28342 28342 

3 0.4 66150 66150 

25 3.1 999999999999 Unknown 

Format 

Type 

Length

Variable Name 

BEST8 

Numeric 

8

CountPowerUnits 

Definition: Documents the number of power units owned, trip-leased, and term-leased by this 
carrier. 

N 

Prcnt 

Code 

Label 

16 2.0 0 0 

59 7.4 1 1 

32 4.0 2 2 

27 3.4 3 3 

18 2.3 4 4 

13 1.6 5 5 

19 2.4 6 6 

12 1.5 7 7 

13 1.6 8 8 

12 1.5 9 9 
------------------------------

1 0.1 8392 8392 

1 0.1 8538 8538 

1 0.1 8923 8923 

1 0.1 8989 8989 

1 0.1 9050 9050 

3 0.4 11279 11279 

2 0.3 12356 12356 

1 0.1 14584 14584 

6 0.8 16500 16500 

3 0.4 58602 58602 

LTCCS Codebook SaferCarrier Data Set  281 


Codebook  SaferCarrier Data Set 

Format 

Type 

Length

Variable Name 

OT45F 

Numeric 

8

MileageYear 

Definition: Documents the calendar year on the carriers MCS-150 form that represents the year in 
which the Carrier-Reported Mileage was obtained. 

N 

Prcnt 

Code 

Label 

1 0.1 1 1 

7 0.9 1997 1997 

21 2.6 1998 1998 

35 4.4 1999 1999
127 16.0 2000 2000
157 19.7 2001 2001
178 22.4 2002 2002

11 1.4 2003 2003
259 32.5 999999999999 Unknown 

Format 

Type 

Length

Variable Name 

OT45F 

Numeric 

8

Mileage 

Definition: Documents the carriers total fleet mileage to the nearest 10,000 miles for the last 
calendar year, as reported by the carrier on the MCS-150 form. 

N 

Prcnt 

Code 

Label
253 31.8 0 0

2 0.3 3000 3000 

1 0.1 6000 6000 

1 0.1 7578 7578 

6 0.8 10000 10000 

1 0.1 13000 13000 

1 0.1 19000 19000 

3 0.4 20000 20000 

1 0.1 24000 24000 

1 0.1 25555 25555 
-----------------------------------

1 0.1 629383966 629383966 

1 0.1 662800784 662800784 

1 0.1 670000000 670000000 

1 0.1 780110000 780110000 

1 0.1 1002438610 1002438610 

1 0.1 1094690409 1094690409 

2 0.3 1522597573 1522597573 

6 0.8 1665000000 1665000000 

LTCCS Codebook SaferCarrier Data Set  282 


Codebook  SaferCarrier Data Set 

N 

Prcnt 

Code 

Label 

1 0.1 1697000000 1697000000 
5 0.6 999999999999 Unknown 
LTCCS Codebook SaferCarrier Data Set  283 


Codebook  SaferCrashSummary Data Set 

SaferCrashSummary Data Set 

The SaferCrashSummary data set contains summary crash information for the drivers carrier 
reported to the FMCSA for a period of 4 years. Each record represents one year of data and four 
records are stored for each vehicle/driver for which this carrier information is available. 

The SaferCrashSummary data set contains the variables CaseID, PSU, PSUStrat, RATWeight, and 
VehicleNumber. CaseID, VehicleNumber and SCSYear uniquely identify each record in this data set. 
CaseID and VehicleNumber should be used to merge the SaferCrashSummary data set with vehicle 
level data sets. 

Format 

Type 

Length

Variable Name 

BEST8 

Numeric 

8

SCSYear 

Definition: Identifies the year from which the crash data is taken. 
N 

Prcnt 

Code 

Label
495 17.8 2000 2000
696 25.0 2001 2001
696 25.0 2002 2002
696 25.0 2003 2003
201 7.2 2004 2004 

Format 

Type 

Length

Variable Name 

BEST8 

Numeric 

8

SCSFatalities 

Definition: Documents the number of crashes that caused at least one fatality for this carrier in a 
particular year. This number includes both the carriers driver(s) and occupants in any other involved 
vehicles. 

N 

Prcnt 

Code 

Label 
2,178 78.2 0 0 
334 12.0 1 1 

76 2.7 2 2 

42 1.5 3 3 

26 0.9 4 4 

22 0.8 5 5 

18 0.6 6 6 

13 0.5 7 7 

10 0.4 8 8 

6 0.2 9 9 

7 0.3 10 10 

7 0.3 11 11 

3 0.1 12 12 

3 0.1 13 13 

1 0.0 14 14 

3 0.1 15 15 

LTCCS Codebook SaferCrashSummary Data Set  284 


Codebook  SaferCrashSummary Data Set 

N 

Prcnt 

Code 

Label 

2 0.1 16 16 

1 0.0 19 19 

6 0.2 20 20 

9 0.3 21 21 

2 0.1 22 22 

2 0.1 23 23 

2 0.1 24 24 

1 0.0 27 27 

1 0.0 29 29 

5 0.2 30 30 

4 0.1 31 31 

Variable Name 

Format 

Type 

Length 

BEST8 

Numeric 

8

SCSInjuries 

Definition: Documents the number of crashes that caused at least one injury for this carrier in a 
particular year. This number includes both the carriers driver(s) and occupants in any other involved 
vehicles. 

N 

Prcnt 

Code 

Label 
1,319 47.4 0 0 
508 18.2 1 1 
213 7.7 2 2 
114 4.1 3 3 

94 3.4 4 4 

66 2.4 5 5 

43 1.5 6 6 

31 1.1 7 7 

28 1.0 8 8 

32 1.1 9 9 
------------------------------

2 0.1 239 239 

2 0.1 242 242 

2 0.1 251 251 

1 0.0 260 260 

2 0.1 261 261 

1 0.0 308 308 

1 0.0 327 327 

5 0.2 329 329 

4 0.1 376 376 

1 0.0 377 377 

LTCCS Codebook SaferCrashSummary Data Set  285 


Codebook  SaferCrashSummary Data Set 

Format 

Type 

Length

Variable Name 

BEST8 

Numeric 

8

SCSTowaway

Definition: Documents the number of crashes that caused at least one vehicle to be towed from the 
scene of a crash involving one of this carriers vehicles in a particular year. This number includes 
both the carrier vehicle and any other involved vehicles. 

N 

Prcnt 

Code 

Label
1,307 46.9 0 0 
445 16.0 1 1 
209 7.5 2 2 
138 5.0 3 3 

76 2.7 4 4 

72 2.6 5 5 

44 1.6 6 6 

43 1.5 7 7 

27 1.0 8 8 

21 0.8 9 9 
------------------------------

1 0.0 323 323 

1 0.0 328 328 

1 0.0 382 382 

5 0.2 388 388 

1 0.0 458 458 

1 0.0 538 538 

1 0.0 545 545 

4 0.1 551 551 

1 0.0 616 616 

4 0.1 635 635 

LTCCS Codebook SaferCrashSummary Data Set  286 


Codebook  SaferDriverCrashReport Data Set 

SaferDriverCrashReport Data Set 

The SaferDriverCrashReport data set contains historical information for previous crashes involving 
the driver from the FMCSA SAFER database. One record of this information is stored for each 
previous crash listed on inspection reports for the driver. This information is provided for each 
vehicle/driver where available. 

The SaferDriverCrashReport data set contains the variables CaseID, PSU, PSUStrat, RATWeight, 
and VehicleNumber. CaseID and VehicleNumber should be used to merge the 
SaferDriverCrashReport data set with the SaferDriverInspection data set and vehicle level data sets. 

Format 

Type 

Length

Variable Name 

$7 

Char 

7

SCDDate 

Definition: Identifies the date of a particular crash. 
N 

Prcnt 

Code 

Label 

2 0.9 * 2001-04 

3 1.4 * 2001-07 

7 3.3 * 2001-08 

6 2.8 * 2001-09 

16 7.4 * 2001-10 

5 2.3 * 2001-11 

1 0.5 * 2001-12 

8 3.7 * 2002-01 

9 4.2 * 2002-02 

14 6.5 * 2002-03 

11 5.1 * 2002-04 

7 3.3 * 2002-05 

5 2.3 * 2002-06 

7 3.3 * 2002-07 

8 3.7 * 2002-08 

12 5.6 * 2002-09 

8 3.7 * 2002-10 

10 4.7 * 2002-11 

5 2.3 * 2002-12 

8 3.7 * 2003-01 

6 2.8 * 2003-02 

13 6.0 * 2003-03 

8 3.7 * 2003-04 

5 2.3 * 2003-05 

3 1.4 * 2003-06 

9 4.2 * 2003-07 

3 1.4 * 2003-08 

9 4.2 * 2003-10 

LTCCS Codebook SaferDriverCrashReport Data Set  287 


Codebook  SaferDriverCrashReport Data Set 

N 

Prcnt 

Code 

Label 

1 0.5 * 2003-11 
6 2.8 * 2003-12 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 
Variable Name 

Format 

Type 

Length 

$2 

Char 

2

SCDState 

Definition: Identifies the State in which a particular crash occurred.
N 

Prcnt 

Code 

Label
25 11.6 * AL
36 16.7 * AZ

16 7.4 * CA 
8 3.7 * CO 
1 0.5 * DE 
12 5.6 * FL 
2 0.9 * IA 
5 2.3 * IL 
25 11.6 * IN
1 0.5 * KY 
4 1.9 * MD 
3 1.4 * MI 
14 6.5 * NE 
6 2.8 * NJ 
4 1.9 * NY 
7 3.3 * PA 
6 2.8 * TN 
17 7.9 * TX 
21 9.8 * WA 
2 0.9 * WV 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Format 

Type 

Length

Variable Name 

$4 

Char 

4

SCDDateOfBirth 

Definition: Identifies the drivers year of birth for a particular crash. 
N 

Prcnt 

Code 

Label 

2 0.9 * 1931 
1 0.5 * 1932 
1 0.5 * 1935 
1 0.5 * 1936 
2 0.9 * 1937 
4 1.9 * 1940 
LTCCS Codebook SaferDriverCrashReport Data Set  288 


Codebook  SaferDriverCrashReport Data Set 

N 

Prcnt 

Code 

Label 

1 0.5 * 1941 

2 0.9 * 1942 

2 0.9 * 1943 

3 1.4 * 1944 

2 0.9 * 1945 

4 1.9 * 1946 

4 1.9 * 1947 

3 1.4 * 1948 

2 0.9 * 1949 

5 2.3 * 1950 

8 3.7 * 1951 

2 0.9 * 1952 

6 2.8 * 1953 

5 2.3 * 1954 

3 1.4 * 1955 

11 5.1 * 1956 

13 6.0 * 1957 

5 2.3 * 1958 

8 3.7 * 1959 

11 5.1 * 1960 

6 2.8 * 1961 

11 5.1 * 1962 

7 3.3 * 1963 

6 2.8 * 1964 

6 2.8 * 1965 

5 2.3 * 1966 

3 1.4 * 1967 

6 2.8 * 1968 

5 2.3 * 1969 

4 1.9 * 1970 

4 1.9 * 1971 

2 0.9 * 1972 

4 1.9 * 1973 

6 2.8 * 1974 

11 5.1 * 1975 

6 2.8 * 1977 

1 0.5 * 1978 

4 1.9 * 1979 

1 0.5 * 1980 

1 0.5 * 1982 

LTCCS Codebook SaferDriverCrashReport Data Set  289 


Codebook  SaferDriverCrashReport Data Set 

N 

Prcnt 

Code 

Label 

1 0.5 * 1984 

4 1.9 * 9999 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Variable Name 

Format 

Type 

Length 

BEST8 

Numeric 

8

SCDFatalities 

Definition: Documents the total number of fatalities as a result of a particular crash. 
N 

Prcnt 

Code 

Label
164 76.3 0 0 
44 20.5 1 1 

6 2.8 2 2 

1 0.5 4 4 

Variable Name 

Format 

Type 

Length 

BEST8 

Numeric 

8

SCDInjuries 

Definition: Documents the total number of persons injured as a result of a particular crash. 

N 

Prcnt 

Code 

Label
42 19.5 0 0 
108 50.2 1 1 
39 18.1 2 2 

14 6.5 3 3 

5 2.3 4 4 

3 1.4 5 5 

2 0.9 9 9 

2 0.9 24 24 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

SCDTowaway

Definition: Indicates whether or not a vehicle involved in a particular crash was towed away from 
the scene of the crash. 

N 

Prcnt 

Code 

Label 

17 7.9 0 Absent
198 92.1 1 Present 

LTCCS Codebook SaferDriverCrashReport Data Set  290 


Codebook  SaferDriverCrashReport Data Set 
Variable Name Format Type Length 
HazardousMaterial AP1U Numeric 8 

Definition: Indicates whether or not there was any hazardous material involved/released in the 

crash. 
N Prcnt Code Label 
214 99.5 0 Absent 
1 0.5 1 Present 

Variable Name 

Format 

Type 

Length 

$3 

Char 

3

ANL 

Definition: Indicates whether or not the sequence of events in the crash included a collision with an 
animal. 

N 

Prcnt 

Code 

Label 

1 0.5 * ANL 
214 99.5 * Abs 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Format 

Type 

Length

Variable Name 

$3 

Char 

3

BIK 

Definition: Indicates whether or not the sequence of events in the crash included a collision with a 
pedal cycle. 

N 

Prcnt 

Code 

Label
214 99.5 * Abs

1 0.5 * BIK 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Format 

Type 

Length

Variable Name 

$3 

Char 

3

CGO 

Definition: Indicates whether or not the sequence of events in the crash included a noncollision 

event involving a cargo loss or shift. 

N 

Prcnt 

Code 

Label
204 94.9 * Abs

11 5.1 * CGO 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

LTCCS Codebook SaferDriverCrashReport Data Set  291 


Codebook  SaferDriverCrashReport Data Set 
Variable Name Format Type Length 
EQF $3 Char 3 

Definition: Indicates whether or not the sequence of events in the crash included a noncollision 

event involving a vehicle failure (e.g. brake failure, blown tire, etc.). 

N 

Prcnt 

Code 

Label
212 98.6 * Abs

3 1.4 * EQF 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Variable Name 

Format 

Type 

Length 

$3 

Char 

3

FIR 

Definition: Indicates whether or not the sequence of events in the crash included a noncollision 

event involving an explosion or fire. 

N 

Prcnt 

Code 

Label
212 98.6 * Abs

3 1.4 * FIR 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Format 

Type 

Length

Variable Name 

$3 

Char 

3

FOB 

Definition: Indicates whether or not the sequence of events in the crash included a collision with a 
fixed object. 

N 

Prcnt 

Code 

Label
186 86.5 * Abs
29 13.5 * FOB 

Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Format 

Type 

Length

Variable Name 

$3 

Char 

3

JAK 

Definition: Indicates whether or not the sequence of events in the crash included a noncollision 

event involving a jackknife. 

N 

Prcnt 

Code 

Label
203 94.4 * Abs

12 5.6 * JAK 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

LTCCS Codebook SaferDriverCrashReport Data Set  292 


Codebook  SaferDriverCrashReport Data Set 
Variable Name Format Type Length 
MVH $3 Char 3 

Definition: Indicates whether or not the sequence of events in the crash included a collision with a 
motor vehicle in transport. 

N 

Prcnt 

Code 

Label
82 38.1 * Abs
133 61.9 * MVH 

Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Variable Name 

Format 

Type 

Length 

$3 

Char 

3

NCM 

Definition: Indicates whether or not the sequence of events in the crash included a noncollision 

event where the vehicle crossed the centerline or the median. 

N 

Prcnt 

Code 

Label
210 97.7 * Abs

5 2.3 * NCM 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Format 

Type 

Length

Variable Name 

$3 

Char 

3

NCO 

Definition: Indicates whether or not the sequence of events in the crash included a noncollision 

event not described by the other Event variable choices. 

N 

Prcnt 

Code 

Label
206 95.8 * Abs

9 4.2 * NCO 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Variable Name 

Format 

Type 

Length 

$3 

Char 

3

OFR 

Definition: Indicates whether or not the sequence of events in the crash included a noncollision 
event where the vehicle ran off the roadway. 

N 

Prcnt 

Code 

Label
184 85.6 * Abs
31 14.4 * OFR 

Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

LTCCS Codebook SaferDriverCrashReport Data Set  293 


Codebook  SaferDriverCrashReport Data Set 
Variable Name Format Type Length 
OOB $3 Char 3 

Definition: Indicates whether or not the sequence of events in the crash included a collision with an 
other moveable object. 

N 

Prcnt 

Code 

Label
211 98.1 * Abs

4 1.9 * OOB 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Variable Name 

Format 

Type 

Length 

$3 

Char 

3

OTH 

Definition: Indicates whether or not the sequence of events in the crash included an other type of 
collision. 

N 

Prcnt 

Code 

Label
209 97.2 * Abs

6 2.8 * OTH 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Format 

Type 

Length

Variable Name 

$3 

Char 

3

OVR 

Definition: Indicates whether or not the sequence of events in the crash included a noncollision 
event involving an overturn/rollover. 

N 

Prcnt 

Code 

Label
187 87.0 * Abs
28 13.0 * OVR 

Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Format 

Type 

Length

Variable Name 

$3 

Char 

3

PED 

Definition: Indicates whether or not the sequence of events in the crash included a collision with a 
pedestrian. 

N 

Prcnt 

Code 

Label
212 98.6 * Abs

3 1.4 * PED 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

LTCCS Codebook SaferDriverCrashReport Data Set  294 


Codebook  SaferDriverCrashReport Data Set 
Variable Name Format Type Length 
PVH $3 Char 3 

Definition: Indicates whether or not the sequence of events in the crash included a collision with a 
parked motor vehicle. 

N 

Prcnt 

Code 

Label
211 98.1 * Abs

4 1.9 * PVH 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Variable Name 

Format 

Type 

Length 

$3 

Char 

3

RUN 

Definition: Indicates whether or not the sequence of events in the crash included a collision that 

involved a downhill runaway vehicle. 

N 

Prcnt 

Code 

Label
211 98.1 * Abs

4 1.9 * RUN 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Format 

Type 

Length

Variable Name 

$3 

Char 

3

SEP 

Definition: Indicates whether or not the sequence of events in the crash included a noncollision 

event involving a separation of units. 

N 

Prcnt 

Code 

Label
215 100.0 * Abs 

Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Variable Name 

Format 

Type 

Length 

$3 

Char 

3

TRN 

Definition: Indicates whether or not the sequence of events in the crash included a collision with a 
train. 

N 

Prcnt 

Code 

Label
214 99.5 * Abs

1 0.5 * TRN 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

LTCCS Codebook SaferDriverCrashReport Data Set  295 


Codebook  SaferDriverCrashReport Data Set 
Variable Name Format Type Length 
UMO $3 Char 3 

Definition: Indicates whether or not the sequence of events in the crash included a collision with an 
unknown moveable object. 

N 

Prcnt 

Code 

Label
215 100.0 * Abs 

Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Variable Name 

Format 

Type 

Length 

$3 

Char 

3

UNK 

Definition: Indicates whether or not the sequence of events in the crash included a noncollision 

event of an unknown nature. 

N 

Prcnt 

Code 

Label
215 100.0 * Abs 

Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Format 

Type 

Length

Variable Name 

$3 

Char 

3

WZE 

Definition: Indicates whether or not the sequence of events in the crash included a collision with 

work zone maintenance equipment. 

N 

Prcnt 

Code 

Label
215 100.0 * Abs 

Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

LTCCS Codebook SaferDriverCrashReport Data Set  296 


Codebook  SaferDriverInspection Data Set 

SaferDriverInspection Data Set 

The SaferDriverInspection data set contains inspection information for the driver while employed by 
this carrier from the FMCSA SAFER database. One record of this information is stored for each 
inspection report and is provided for each vehicle/driver where available. 

The SaferDriverInspection data set contains the variables CaseID, PSU, PSUStrat, RATWeight, and 
VehicleNumber. CaseID and VehicleNumber should be used to merge the SaferDriverInspection 
data set with vehicle level data sets. 

Format 

Type 

Length

Variable Name 

BEST8 

Numeric 

8

LevelCode 

Definition: Indicates the level of the inspection for a particular inspection. 
N 

Prcnt 

Code 

Label
392 49.3 1 1 
201 25.3 2 2 
182 22.9 3 3 

20 2.5 4 4 

Format 

Type 

Length

Variable Name 

$7 

Char 

7

SDIDate 

Definition: Documents the date of a particular inspection. 
N 

Prcnt 

Code 

Label 

1 0.1 * 2001-02 

1 0.1 * 2001-03 

2 0.3 * 2001-04 

5 0.6 * 2001-05 

13 1.6 * 2001-06 

13 1.6 * 2001-07 

23 2.9 * 2001-08 

13 1.6 * 2001-09 

16 2.0 * 2001-10 

20 2.5 * 2001-11 

8 1.0 * 2001-12 

25 3.1 * 2002-01 

24 3.0 * 2002-02 

24 3.0 * 2002-03 

32 4.0 * 2002-04 

34 4.3 * 2002-05 

53 6.7 * 2002-06 

40 5.0 * 2002-07 

45 5.7 * 2002-08 

LTCCS Codebook SaferDriverInspection Data Set  297 


Codebook  SaferDriverInspection Data Set 

N 

Prcnt 

Code 

Label 

44 5.5 * 2002-09 
29 3.6 * 2002-10 
38 4.8 * 2002-11 
40 5.0 * 2002-12 
33 4.2 * 2003-01 
28 3.5 * 2003-02 
37 4.7 * 2003-03 
29 3.6 * 2003-04 
21 2.6 * 2003-05 
29 3.6 * 2003-06 
19 2.4 * 2003-07 
15 1.9 * 2003-08 
11 1.4 * 2003-09 
15 1.9 * 2003-10 
4 0.5 * 2003-11 
11 1.4 * 2003-12 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Variable Name 

Format 

Type 

Length 

$2 

Char 

2

SDIState 

Definition: Documents the State in which a particular inspection took place. 
N 

Prcnt 

Code 

Label 

31 3.9 * AL 
19 2.4 * AR 
48 6.0 * AZ 
75 9.4 * CA 
45 5.7 * CO 
21 2.6 * FL 
11 1.4 * GA 
12 1.5 * IA 
1 0.1 * ID 
37 4.7 * IL 
30 3.8 * IN 
5 0.6 * KS 
18 2.3 * KY 
3 0.4 * LA 
36 4.5 * MD 
31 3.9 * MI 
11 1.4 * MO 
11 1.4 * MS 
5 0.6 * MT 
12 1.5 * NC 
LTCCS Codebook SaferDriverInspection Data Set  298 


Codebook  SaferDriverInspection Data Set 

N 

Prcnt 

Code 

Label 

31 3.9 * NE 
25 3.1 * NJ 
14 1.8 * NM 
1 0.1 * NV 
10 1.3 * NY 
17 2.1 * OH 
12 1.5 * OR 
38 4.8 * PA 
1 0.1 * RI 
3 0.4 * SC 
4 0.5 * SD 
43 5.4 * TN 
29 3.6 * TX 
1 0.1 * US 
8 1.0 * UT 
3 0.4 * VA
82 10.3 * WA
8 1.0 * WI 
2 0.3 * WV 
1 0.1 * WY 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Format 

Type 

Length

Variable Name 

$4 

Char 

4

SDIDriverDOB 

Definition: Documents the drivers year of birth as it relates to a particular inspection. 
N 

Prcnt 

Code 

Label 

1 0.1 * 1928 
1 0.1 * 1930 
3 0.4 * 1931 
4 0.5 * 1932 
1 0.1 * 1935 
1 0.1 * 1936 
3 0.4 * 1937 
1 0.1 * 1938 
1 0.1 * 1939 
17 2.1 * 1940 
2 0.3 * 1941 
10 1.3 * 1942 
13 1.6 * 1943 
18 2.3 * 1944 
7 0.9 * 1945 
7 0.9 * 1946 
LTCCS Codebook SaferDriverInspection Data Set  299 


Codebook  SaferDriverInspection Data Set 

N 

Prcnt 

Code 

Label 

7 0.9 * 1947 

5 0.6 * 1948 

8 1.0 * 1949 

11 1.4 * 1950 

36 4.5 * 1951 

12 1.5 * 1952 

24 3.0 * 1953 

49 6.2 * 1954 

12 1.5 * 1955 

12 1.5 * 1956 

45 5.7 * 1957 

15 1.9 * 1958 

20 2.5 * 1959 

24 3.0 * 1960 

17 2.1 * 1961 

15 1.9 * 1962 

15 1.9 * 1963 

16 2.0 * 1964 

16 2.0 * 1965 

18 2.3 * 1966 

33 4.2 * 1967 

18 2.3 * 1968 

13 1.6 * 1969 

26 3.3 * 1970 

28 3.5 * 1971 

23 2.9 * 1972 

26 3.3 * 1973 

15 1.9 * 1974 

33 4.2 * 1975 

12 1.5 * 1976 

9 1.1 * 1977 

3 0.4 * 1978 

8 1.0 * 1979 

6 0.8 * 1980 

1 0.1 * 1981 

4 0.5 * 1982 

2 0.3 * 8888 

68 8.6 * 9999 

Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

LTCCS Codebook SaferDriverInspection Data Set  300 


Codebook  SaferDriverInspection Data Set 
Variable Name 

Format 

Type 

Length 

BEST8 

Numeric 

8

SDITotalViolations 

Definition: Indicates the total number of violations found during a particular inspection. 
N 

Prcnt 

Code 

Label
207 26.0 0 0 
190 23.9 1 1 
131 16.5 2 2 
85 10.7 3 3 

37 4.7 4 4 

36 4.5 5 5 

28 3.5 6 6 

25 3.1 7 7 

16 2.0 8 8 

6 0.8 9 9 

8 1.0 10 10 

8 1.0 11 11 

7 0.9 12 12 

2 0.3 13 13 

1 0.1 14 14 

2 0.3 15 15 

1 0.1 17 17 

2 0.3 18 18 

1 0.1 21 21 

1 0.1 23 23 

1 0.1 24 24 

Format 

Type 

Length

Variable Name 

BEST8 

Numeric 

8

TotalOOS 

Definition: Indicates the total number of out-of-service violations found during a particular 
inspection. 

N 

Prcnt 

Code 

Label
568 71.4 0 0 
139 17.5 1 1 

41 5.2 2 2 

15 1.9 3 3 

17 2.1 4 4 

6 0.8 5 5 

1 0.1 6 6 

1 0.1 7 7 

1 0.1 8 8 

LTCCS Codebook SaferDriverInspection Data Set  301 


Codebook  SaferDriverInspection Data Set 
N Prcnt Code Label 
2 0.3 10 10 
1 0.1 15 15 
Variable Name 
SDIHazMat 
Format 
BEST8 
Type 
Numeric 
Length 
8 

Definition: Indicates whether or not a particular inspection involved hazardous materials. 

N Prcnt Code Label 
746 93.8 0 0 
49 6.2 1 1 

LTCCS Codebook SaferDriverInspection Data Set  302 


Codebook  SaferDriverViolation Data Set 

SaferDriverViolation Data Set 

The SaferDriverViolation data set includes information on any violation issued to the driver while 
employed by this carrier from the FMCSA SAFER database. One record of this information is stored 
for each violation listed on inspection reports for the driver. This information is provided for each 
vehicle/driver where available. 

The SaferDriverViolation data set contains the variables CaseID, PSU, PSUStrat, RATWeight, and 
VehicleNumber. CaseID and VehicleNumber should be used to merge the SaferDriverViolation data 
set with the SaferDriverInspection data set and vehicle level data sets. 

Format 

Type 

Length

Variable Name 

$10 

Char 

10

SDVViolation 

Definition: Lists the different types of violations assigned to this particular driver within a particular 
time period. 

N 

Prcnt 

Code 

Label
68 10.6 * BRKADJ
110 17.1 * BRKOTH

4 0.6 * COUPLR 
26 4.0 * EMREQP 
11 1.7 * EXHST 
10 1.6 * FRAMES 
3 0.5 * FUEL 
3 0.5 * HPLCRD 
1 0.2 * IMPTRN 
11 1.7 * LDSECR
130 20.2 * LIGHTS
2 0.3 * LOGVIO 
45 7.0 * OTHDRV
72 11.2 * OTHER
17 2.6 * PERINS 
7 1.1 * SIZWGT 
11 1.7 * STERNG 
26 4.0 * SUSPEN 
57 8.9 * TIRES 
9 1.4 * WHEELS 
20 3.1 * WNDSHL 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

LTCCS Codebook SaferDriverViolation Data Set  303 


Codebook  SaferDriverViolation Data Set 

Variable Name 
UnitNumber 
Format 
BEST8 
Type 
Numeric 
Length 
8 
Definition: Is an identifier used to distinguish individual units inspected. 
N Prcnt Code Label 
417 64.9 1 1 
213 33.1 2 2 
12 1.9 3 3 
1 0.2 4 4 
Variable Name 
SDVUnitType 
Format 
$10 
Type 
Char 
Length 
10 

Definition: Indicates the type of unit on which a particular inspection is conducted.
N 

Prcnt 

Code 

Label 

15 2.3 * FT 
1 0.2 * SB
212 33.0 * ST
127 19.8 * TR
288 44.8 * TT 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Format 

Type 

Length

Variable Name 

$10 

Char 

10

SDVOutOfService 

Definition: Documents the number of out-of-service violations for a particular driver within a 
particular time period. 

N 

Prcnt 

Code 

Label
476 74.0 * 0 
167 26.0 * 1 

Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

LTCCS Codebook SaferDriverViolation Data Set  304 


Codebook  SaferInspectionsSummary Data Set 

SaferInspectionsSummary Data Set 

The SaferInspectionsSummary data set contains a summary of vehicle, driver, and hazardous 
material inspection information for the drivers carrier reported to the FMCSA for the period of 2 years 
prior to the date of inquiry. This material is provided as one record per vehicle/driver for which this 
carrier information is available. 

The SaferInspectionsSummary data set contains the variables CaseID, PSU, PSUStrat, RATWeight, 
and VehicleNumber. CaseID and VehicleNumber uniquely identify each record in this data set and 
should be used to merge the SaferInspectionsSummary data set with vehicle level data sets. 

Format 

Type 

Length

Variable Name 

BEST8 

Numeric 

8

DriverInspections 

Definition: Documents the total number of driver inspections for this carrier in the 24 months prior to 
the date of inquiry. 

N 

Prcnt 

Code 

Label 

15 1.9 0 0 

16 2.0 1 1 

13 1.6 2 2 

13 1.6 3 3 

25 3.1 4 4 

10 1.3 5 5 

4 0.5 6 6 

15 1.9 7 7 

14 1.8 8 8 

7 0.9 9 9 
------------------------------

1 0.1 18841 18841 

1 0.1 18854 18854 

1 0.1 18981 18981 

1 0.1 18989 18989 

1 0.1 19128 19128 

1 0.1 30240 30240 

1 0.1 30270 30270 

1 0.1 57961 57961 

1 0.1 60788 60788 

4 0.5 62076 62076 

LTCCS Codebook SaferInspectionsSummary Data Set  305 


Codebook  SaferInspectionsSummary Data Set 
Variable Name 

Format 

Type 

Length 

BEST8 

Numeric 

8

DriverOutOfService 

Definition: Documents the total number of driver out-of-service inspections where out-of-service 
violations were found for this carrier in the 24 months prior to the date of inquiry. 

N 

Prcnt 

Code 

Label
182 22.9 0 0 
98 12.3 1 1 

73 9.2 2 2 

33 4.1 3 3 

34 4.3 4 4 

23 2.9 5 5 

24 3.0 6 6 

13 1.6 7 7 

11 1.4 8 8 

14 1.8 9 9 
-------------------------------

1 0.1 987 987 

1 0.1 1006 1006 

1 0.1 1020 1020 

1 0.1 1178 1178 

1 0.1 1218 1218 

1 0.1 1219 1219 

1 0.1 1227 1227 

1 0.1 2999 2999 

1 0.1 3066 3066 

4 0.5 3100 3100 

Format 

Type 

Length

Variable Name 

BEST8 

Numeric 

8

DriverOutOfServicePerc 

Definition: Documents the percentage of inspections that resulted in one or more driver 
out-of-service violations for this carrier in the 24 months prior to the date of inquiry. 

N 

Prcnt 

Code 

Label
200 25.1 0 0 

50 6.3 1 1 
97 12.2 2 2 

42 5.3 3 3 

53 6.7 4 4 

72 9.0 5 5 

58 7.3 6 6 

25 3.1 7 7 

LTCCS Codebook SaferInspectionsSummary Data Set  306 


Codebook  SaferInspectionsSummary Data Set 

N 

Prcnt 

Code 

Label 

35 4.4 8 8 

15 1.9 9 9 

14 1.8 10 10 

19 2.4 11 11 

25 3.1 12 12 

4 0.5 13 13 

7 0.9 14 14 

3 0.4 15 15 

4 0.5 16 16 

13 1.6 17 17 

2 0.3 18 18 

5 0.6 19 19 

2 0.3 20 20 

2 0.3 21 21 

5 0.6 22 22 

1 0.1 24 24 

9 1.1 25 25 

5 0.6 26 26 

1 0.1 27 27 

1 0.1 30 30 

3 0.4 31 31 

1 0.1 34 34 

2 0.3 35 35 

1 0.1 36 36 

1 0.1 45 45 

2 0.3 50 50 

1 0.1 56 56 

13 1.6 57 57 

2 0.3 58 58 

1 0.1 67 67 

Format 

Type 

Length

Variable Name 

F16.2 

Numeric 

8

DriverViolationsAverage 

Definition: Documents the average number of driver out-of-service violations found per inspection 
for this carrier in the 24 months prior to the date of inquiry. 

N 

Prcnt 

Code 

Label
690 86.7 0 0

18 2.3 1 1
88 11.1 9999999999999 999999999999 

LTCCS Codebook SaferInspectionsSummary Data Set  307 


Codebook  SaferInspectionsSummary Data Set 

Format 

Type 

Length

Variable Name 

BEST8 

Numeric 

8

VehicleInspections 

Definition: Documents the total number of vehicle inspections for this carrier in the 24 months prior 
to the date of inquiry. 

N 

Prcnt 

Code 

Label 

21 2.6 0 0 

18 2.3 1 1 

16 2.0 2 2 

24 3.0 3 3 

14 1.8 4 4 

16 2.0 5 5 

6 0.8 6 6 

7 0.9 7 7 

18 2.3 8 8 

18 2.3 9 9 
------------------------------

1 0.1 11574 11574 

1 0.1 11587 11587 

1 0.1 11601 11601 

1 0.1 12112 12112 

1 0.1 12270 12270 

1 0.1 20083 20083 

1 0.1 20100 20100 

1 0.1 35545 35545 

1 0.1 36922 36922 

4 0.5 37747 37747 

Format 

Type 

Length

Variable Name 

BEST8 

Numeric 

8

VehicleOutOfService 

Definition: Documents the total number of vehicle out-of-service inspections where out-of-service 
violations were found for this carrier in the 24 months prior to the date of inquiry. 

N 

Prcnt 

Code 

Label 

71 8.9 0 0 

55 6.9 1 1 

61 7.7 2 2 

26 3.3 3 3 

38 4.8 4 4 

31 3.9 5 5 

13 1.6 6 6 

14 1.8 7 7 

14 1.8 8 8 

21 2.6 9 9 

LTCCS Codebook SaferInspectionsSummary Data Set  308 


Codebook  SaferInspectionsSummary Data Set 

N 

Prcnt 

Code 

Label 
------------------------------

1 0.1 1764 1764 

1 0.1 2302 2302 

1 0.1 2389 2389 

1 0.1 2445 2445 

1 0.1 2450 2450 

1 0.1 2941 2941 

1 0.1 2948 2948 

1 0.1 5940 5940 

1 0.1 6242 6242 

4 0.5 6338 6338 

Variable Name 

Format 

Type Length 

BEST8 

Numeric 

8

VehicleOutOfServicePerc 

Definition: Documents the percentage of inspections that resulted in one or more vehicle 
out-of-service violations for this carrier in the 24 months prior to the date of inquiry. 

N 

Prcnt 

Code 

Label
130 16.3 0 0 

5 0.6 1 1 

3 0.4 2 2 

5 0.6 3 3 

5 0.6 4 4 

14 1.8 5 5 

11 1.4 6 6 

15 1.9 7 7 

9 1.1 8 8 

12 1.5 9 9 
-------------------------------

3 0.4 54 54 

13 1.6 57 57 

18 2.3 58 58 

1 0.1 62 62 

1 0.1 63 63 

4 0.5 67 67 

3 0.4 68 68 

1 0.1 70 70 

4 0.5 75 75 

2 0.3 100 100 

LTCCS Codebook SaferInspectionsSummary Data Set  309 


Codebook  SaferInspectionsSummary Data Set 

Format 

Type 

Length

Variable Name 

F16.2 

Numeric 

8

VehicleViolationsAverage 

Definition: Documents the average number of vehicle out-of-service violations found per inspection 
for this carrier in the 24 months prior to the date of inquiry. 

N 

Prcnt 

Code 

Label
562 70.6 0 0.00
133 16.7 1 1.00

12 1.5 2 2.00 
1 0.1 3 3.00
88 11.1 999999999999 999999999999.00 
Format 

Type 

Length

Variable Name 

BEST8 

Numeric 

8

HazmatInspections 

Definition: Documents the total number of Hazmat inspections for this carrier in the 24 months prior 
to the date of inquiry. 

N 

Prcnt 

Code 

Label
462 58.0 0 0 

46 5.8 1 1 
34 4.3 2 2 
13 1.6 3 3 
7 0.9 4 4 
8 1.0 5 5 
10 1.3 6 6 
10 1.3 7 7 
4 0.5 8 8 
1 0.1 9 9 
------------------------------
2 0.3 1903 1903 
1 0.1 1928 1928 
1 0.1 1991 1991 
1 0.1 2052 2052 
4 0.5 2088 2088 
3 0.4 2299 2299 
1 0.1 2362 2362 
1 0.1 2561 2561 
1 0.1 2611 2611 
1 0.1 5428 5428 
LTCCS Codebook SaferInspectionsSummary Data Set  310 


Codebook  SaferInspectionsSummary Data Set 
Variable Name 

Format 

Type 

Length 

BEST8 

Numeric 

8

HazmatOutOfService 

Definition: Documents the total number of Hazmat out-of-service inspections where out-of-service 
violations were found for this carrier in the 24 months prior to the date of inquiry. 

N 

Prcnt 

Code 

Label
590 74.1 0 0 

56 7.0 1 1 

19 2.4 2 2 

9 1.1 3 3 

12 1.5 4 4 

11 1.4 5 5 

7 0.9 6 6 

3 0.4 7 7 

8 1.0 8 8 

19 2.4 9 9 

7 0.9 12 12 

3 0.4 13 13 

1 0.1 14 14 

3 0.4 15 15 

2 0.3 16 16 

3 0.4 18 18 

1 0.1 19 19 

1 0.1 22 22 

3 0.4 25 25 

1 0.1 26 26 

1 0.1 28 28 

1 0.1 34 34 

1 0.1 36 36 

2 0.3 42 42 

1 0.1 43 43 

1 0.1 46 46 

1 0.1 48 48 

2 0.3 49 49 

1 0.1 54 54 

1 0.1 56 56 

1 0.1 57 57 

2 0.3 63 63 

1 0.1 65 65 

1 0.1 68 68 

1 0.1 71 71 

1 0.1 77 77 

LTCCS Codebook SaferInspectionsSummary Data Set  311 


Codebook  SaferInspectionsSummary Data Set 

N 

Prcnt 

Code 

Label 

1 0.1 78 78 
2 0.3 84 84 
2 0.3 85 85 
1 0.1 100 100 
1 0.1 104 104 
1 0.1 111 111 
1 0.1 124 124 
3 0.4 129 129 
1 0.1 135 135 
1 0.1 138 138 
4 0.5 139 139 
Variable Name 

Format 

Type 

Length 

F9.2 

Numeric 

8

HazmatOutOfServicePerc 

Definition: Documents the percentage of inspections that resulted in one or more Hazmat 
out-of-service violations for this carrier in the 24 months prior to the date of inquiry. 

N 

Prcnt 

Code 

Label
528 66.3 0 0.00

11 1.4 1 1.00 
8 1.0 2 2.00 
13 1.6 3 3.00 
31 3.9 4 4.00 
17 2.1 5 5.00 
24 3.0 6 6.00 
10 1.3 7 7.00 
6 0.8 8 8.00 
5 0.6 9 9.00 
7 0.9 10 10.00 
4 0.5 11 11.00 
7 0.9 12 12.00 
2 0.3 13 13.00 
1 0.1 15 15.00 
2 0.3 16 16.00 
5 0.6 17 17.00 
5 0.6 20 20.00 
1 0.1 23 23.00 
10 1.3 25 25.00 
1 0.1 33 33.00 
10 1.3 50 50.00
88 11.1 99999 99999.00 
LTCCS Codebook SaferInspectionsSummary Data Set  312 


Codebook  SaferInspectionsSummary Data Set 

Format 

Type 

Length

Variable Name 

F16.2 

Numeric 

8

HazmatViolationsAverage 

Definition: Documents the average number of Hazmat out-of-service violations found per 
inspection for this carrier in the 24 months prior to the date of inquiry. 

N 

Prcnt 

Code 

Label
706 88.7 0 0.00

1 0.1 1 1.00 
1 0.1 2 2.00
88 11.1 999999999999 999999999999.00 
Variable Name 

Format 

Type 

Length 

BEST8 

Numeric 

8

SISTotal 

Definition: Documents the total number of inspections (any type) for this carrier in the 24 months 
prior to the date of inquiry. The Total Number Of Inspections may not reflect a simple addition of all 
the driver, vehicle, and Hazmat inspections because two or more of these types of violations may 
occur on the same inspection. 

N 

Prcnt 

Code 

Label 

14 1.8 0 0 
15 1.9 1 1 
15 1.9 2 2 
10 1.3 3 3 
23 2.9 4 4 
13 1.6 5 5 
5 0.6 6 6 
12 1.5 7 7 
17 2.1 8 8 
6 0.8 9 9 
------------------------------
1 0.1 18962 18962 
1 0.1 19093 19093 
1 0.1 19104 19104 
1 0.1 19217 19217 
1 0.1 19257 19257 
1 0.1 30582 30582 
1 0.1 30608 30608 
1 0.1 58513 58513 
1 0.1 61334 61334 
4 0.5 62663 62663 
LTCCS Codebook SaferInspectionsSummary Data Set  313 


Codebook  SaferInsurance Data Set 

SaferInsurance Data Set 

The SaferInsurance data set includes information on the type and status of insurance that the drivers 
carrier holds from the FMCSA SAFER database. This material is provided as one record per 
vehicle/driver for which this carrier information is available. 

The SaferInsurance data set contains the variables CaseID, PSU, PSUStrat, RATWeight, and 
VehicleNumber. CaseID and VehicleNumber uniquely identify each record in this data set and 
should be used to merge the SaferInsurance data set with vehicle level data sets. 

Format 

Type 

Length

Variable Name 

$2 

Char 

2

BIPDRequired 

Definition: Documents whether or not the carrier is required to have Bodily Injury & Property 

Damage insurance coverage. 

N 

Prcnt 

Code 

Label
64 10.6 * N 

23 3.8 * NA
518 85.6 * Y 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Variable Name 

Format 

Type 

Length 

$20 

Char 

20

BIPDOK 

Definition: Documents whether or not the carrier has the required Bodily Injury & Property Damage 
insurance coverage. 

N 

Prcnt 

Code 

Label 

23 3.8 * NA 
2 0.3 * NO 
10 1.7 * NOT OK
570 94.2 * OK 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Variable Name 

Format 

Type 

Length 

$20 

Char 

20

CargoRequired 

Definition: Documents whether or not the carrier is required to have cargo insurance coverage. 
N 

Prcnt 

Code 

Label 

23 3.8 * NA
232 38.3 * NOT REQUIRED
350 57.9 * REQUIRED 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

LTCCS Codebook SaferInsurance Data Set  314 


Codebook  SaferInsurance Data Set 

Format 

Type 

Length

Variable Name 

$20 

Char 

20

CargoOK 

Definition: Documents whether or not the carrier has cargo insurance coverage when required to 

have this type of coverage. 

N 

Prcnt 

Code 

Label 

23 3.8 * NA 
1 0.2 * NO 
6 1.0 * NOT OK
575 95.0 * OK 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Variable Name 

Format 

Type 

Length 

$20 

Char 

20

BondRequired 

Definition: Documents whether or not a $10,000 surety bond is required for the brokers license 

(authority). 

N 

Prcnt 

Code 

Label 

23 3.8 * NA
445 73.6 * NOT REQUIRED
137 22.6 * REQUIRED 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Variable Name 

Format 

Type 

Length 

$20 

Char 

20

BondOK 

Definition: Documents whether or not the surety bond was in place on the brokers license 

(authority). 

N 

Prcnt 

Code 

Label 

23 3.8 * NA 
2 0.3 * NOT OK
580 95.9 * OK 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Format 

Type 

Length

Variable Name 

F16.2 

Numeric 

8

MinCoverageAmount 

Definition: Documents (in thousands of dollars) the minimum amount of liability insurance coverage 
that this carrier is required to have. 

N 

Prcnt 

Code 

Label 

1 0.2 300 300
388 64.1 750 750
146 24.1 1000 1000
1 0.2 1500 1500 
LTCCS Codebook SaferInsurance Data Set  315 


Codebook  SaferInsurance Data Set 

N 
46 
23 
Prcnt 
7.6 
3.8 
Code 
5000 
8888888887 
Label 
5000 
8888888887 
Variable Name 
LiabilityInsurance 
Format 
$20 
Type 
Char 
Length 
20 

Definition: Documents the amount (in thousands of dollars) of the liability insurance coverage that 
this carrier has. 

N 

Prcnt 

Code 

Label 

23 3.8 * NA 
64 10.6 * NOT REQUIRED
133 22.0 * REQUIRED: $1000

1 0.2 * REQUIRED: $1500 
1 0.2 * REQUIRED: $300 
40 6.6 * REQUIRED: $5000
343 56.7 * REQUIRED: $750 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

LTCCS Codebook SaferInsurance Data Set  316 


Codebook  SaferReview Data Set 

SaferReview Data Set 

The SaferReview data set contains the safety ratings of the drivers carrier based on their compliance 
with FMCSA regulations from the FMCSA SAFER database. One record of this information is 
provided for each carrier review and reviews are stored for each vehicle/driver where this information 
is available. 

The SaferReview data set contains the variables CaseID, PSU, PSUStrat, RATWeight, and 
VehicleNumber. CaseID, VehicleNumber and ReviewDate uniquely identify each record in this data 
set. CaseID and VehicleNumber should be used to merge the SaferReview data set with vehicle 
level data sets. 

Variable Name 

Format 

Type 

Length 

$7 

Char 

7

RatingDate 

Definition: Documents the date that the current Federal safety rating was assigned to this carrier. 
N 

Prcnt 

Code 

Label 

2 0.1 * 1986-09 

1 0.1 * 1986-11 

3 0.2 * 1986-12 

2 0.1 * 1987-01 

1 0.1 * 1987-03 

2 0.1 * 1987-04 

4 0.3 * 1987-05 

6 0.4 * 1987-06 

6 0.4 * 1987-07 

6 0.4 * 1987-08 
------------------------------

4 0.3 * 2002-09 

4 0.3 * 2002-10 

4 0.3 * 2002-11 

3 0.2 * 2002-12 

3 0.2 * 2003-01 

3 0.2 * 2003-02 

2 0.1 * 2003-03 

4 0.3 * 2003-04 

1 0.1 * 2003-05 

1 0.1 * 2003-06 

Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

LTCCS Codebook SaferReview Data Set  317 


Codebook  SaferReview Data Set 

Format 

Type 

Length

Variable Name 

$30 

Char 

30

Rating 

Definition: Documents the current Federal safety rating assigned to this carrier.
N 

Prcnt 

Code 

Label 

74 4.7 999999999 999999999
387 24.5 * CONDITIONAL
996 63.0 * SATISFACTORY

1 0.1 * UNSATISFACTO
123 7.8 * UNSATISFACTORY 

Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Format 

Type 

Length

Variable Name 

$7 

Char 

7

ReviewDate 

Definition: Documents the date that the most recent Safety/Compliance Review was performed on 
this carrier. 

N 

Prcnt 

Code 

Label 

2 0.1 * 1986-09 

2 0.1 * 1986-11 

5 0.3 * 1986-12 

6 0.4 * 1987-01 

3 0.2 * 1987-02 

10 0.6 * 1987-03 

2 0.1 * 1987-04 

8 0.5 * 1987-05 

12 0.8 * 1987-06 

9 0.6 * 1987-07 
------------------------------

3 0.2 * 2002-08 

2 0.1 * 2002-09 

6 0.4 * 2002-10 

5 0.3 * 2002-11 

1 0.1 * 2002-12 

4 0.3 * 2003-01 

2 0.1 * 2003-02 

3 0.2 * 2003-03 

1 0.1 * 2003-04 

1 0.1 * 2003-05 

Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

LTCCS Codebook SaferReview Data Set  318 


Codebook  SaferReview Data Set 

Format 

Type 

Length

Variable Name 

$30 

Char 

30

ReviewType 

Definition: Documents the type of review performed on this carrier.
N

Prcnt 

Code 

Label
1,349 85.3 * COMPLIANCE

1 0.1 * EDUC CONTACT 
3 0.2 * NON-RATABLE
227 14.4 * SAFETY
1 0.1 * SHIPPER 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

LTCCS Codebook SaferReview Data Set  319 


Codebook  SafeStat Data Set 

SafeStat Data Set 

The SafeStat data set contains safety statistics for the drivers carrier from the FMCSA SAFER 
database. Scores are compiled for driver, vehicle, accident, and the safety management areas. One 
record of this information is provided for each SafeStat score assigned to a carrier. These scores are 
stored for each vehicle/driver where this information is available. 

The SafeStat data set contains the variables CaseID, PSU, PSUStrat, RATWeight, and 
VehicleNumber. CaseID and VehicleNumber should be used to merge the SafeStat data set with 
other vehicle level data sets. 

Format 

Type 

Length

Variable Name 

$7 

Char 

7

STADate 

Definition: Establishes the date that a particular SafeStat score was assigned to a carrier. 
N 

Prcnt 

Code 

Label 

1 0.1 * 2002-02 

49 2.6 * 2002-03 

4 0.2 * 2002-04 

9 0.5 * 2002-05
102 5.4 * 2002-06

11 0.6 * 2002-07 

1 0.1 * 2002-08
134 7.1 * 2002-09
262 13.9 * 2002-11
289 15.4 * 2003-01
152 8.1 * 2003-02
146 7.8 * 2003-03
137 7.3 * 2003-04
130 6.9 * 2003-05
121 6.4 * 2003-06
100 5.3 * 2003-07

83 4.4 * 2003-08 

72 3.8 * 2003-09 

46 2.4 * 2003-10 

26 1.4 * 2003-11 

7 0.4 * 2003-12 

Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

LTCCS Codebook SafeStat Data Set  320 


Codebook  SafeStat Data Set 

Format 

Type 

Length

Variable Name 

OT36F 

Numeric 

8

Score 

Definition: Documents the overall SafeStat Score, where SafeStat score = 2 x Accident SEA + 1.5 
x Driver SEA + Vehicle SEA + Safety Management SEA. 

N 

Prcnt 

Code 

Label 

2 0.1 0 0 

1 0.1 162 162 

1 0.1 169 169 

4 0.2 170 170 

2 0.1 171 171 

1 0.1 183 183 

1 0.1 185 185 

1 0.1 193 193 

2 0.1 195 195 

1 0.1 198 198 
------------------------------

1 0.1 406 406 

1 0.1 407 407 

1 0.1 413 413 

1 0.1 414 414 

2 0.1 429 429 

2 0.1 431 431 

1 0.1 432 432 

1 0.1 433 433 

1 0.1 434 434 
1,700 90.3 999 Unknown 

Format 

Type 

Length

Variable Name 

F12 

Numeric 

8

AccidentSEA 

Definition: Documents the SafeStat score for the Accident SEA category for this carrier. 
N 

Prcnt 

Code 

Label
561 29.8 0 0 

16 0.9 1 1 

18 1.0 2 2 

12 0.6 3 3 

19 1.0 4 4 

26 1.4 5 5 

36 1.9 6 6 

37 2.0 7 7 

9 0.5 8 8 
-------------------------------

LTCCS Codebook SafeStat Data Set  321 


Codebook  SafeStat Data Set 

N 

Prcnt 

Code 

Label 

10 0.5 90 90 

10 0.5 91 91 

8 0.4 92 92 

4 0.2 93 93 

6 0.3 94 94 

5 0.3 95 95 

7 0.4 96 96 

7 0.4 97 97 

7 0.4 98 98 

8 0.4 99 99 

Format 

Type 

Length

Variable Name 

F12 

Numeric 

8

DriverSEA 

Definition: Documents the SafeStat score for the Driver SEA category for this carrier. 
N 

Prcnt 

Code 

Label
284 15.1 0 0 

12 0.6 1 1 

14 0.7 2 2 

4 0.2 3 3 

7 0.4 4 4 

5 0.3 5 5 

8 0.4 6 6 

35 1.9 7 7 

34 1.8 8 8 

26 1.4 9 9 
-------------------------------

13 0.7 91 91 

24 1.3 92 92 

14 0.7 93 93 

13 0.7 94 94 

10 0.5 95 95 

9 0.5 96 96 

15 0.8 97 97 

5 0.3 98 98 

2 0.1 99 99 

9 0.5 100 100 

LTCCS Codebook SafeStat Data Set  322 


Codebook  SafeStat Data Set 

Format 

Type 

Length

Variable Name 

F12 

Numeric 

8

VehicleSEA 

Definition: Documents the SafeStat score for the Vehicle SEA category for this carrier. 
N 

Prcnt 

Code 

Label 

95 5.0 0 0 

13 0.7 2 2 

9 0.5 3 3 

1 0.1 4 4 

4 0.2 5 5 

9 0.5 6 6 

5 0.3 7 7 

7 0.4 8 8 

11 0.6 9 9 

8 0.4 10 10 
-------------------------------

10 0.5 91 91 

15 0.8 92 92 

15 0.8 93 93 

14 0.7 94 94 

6 0.3 95 95 

18 1.0 96 96 

18 1.0 97 97 

10 0.5 98 98 

10 0.5 99 99 

3 0.2 100 100 

Format 

Type 

Length

Variable Name 

F12 

Numeric 

8

SafetySEA 

Definition: Documents the SafeStat score for the Safety Management SEA category for this carrier. 
N 

Prcnt 

Code 

Label 
1,519 80.7 0 0 

4 0.2 52 52 

9 0.5 53 53 

2 0.1 56 56 

28 1.5 57 57 

12 0.6 58 58 

9 0.5 61 61 

34 1.8 62 62 

6 0.3 63 63 

11 0.6 65 65 

LTCCS Codebook SafeStat Data Set  323 


Codebook  SafeStat Data Set 

N 

Prcnt 

Code 

Label 

23 1.2 66 66 

1 0.1 67 67 

4 0.2 68 68 

11 0.6 69 69 

17 0.9 70 70 

18 1.0 71 71 

14 0.7 72 72 

36 1.9 73 73 

17 0.9 74 74 

5 0.3 77 77 

13 0.7 78 78 

3 0.2 81 81 

1 0.1 82 82 

22 1.2 84 84 

9 0.5 87 87 

6 0.3 88 88 

8 0.4 89 89 

9 0.5 90 90 

2 0.1 91 91 

1 0.1 94 94 

3 0.2 96 96 

7 0.4 97 97 

6 0.3 98 98 

8 0.4 99 99 

4 0.2 100 100 

Variable Name 

Format 

Type 

Length 

$10 

Char 

10

STACategory

Definition: Provides the letter code for the category indicator value calculated for this carrier. 
N 

Prcnt 

Code 

Label 

19 1.0 * A 

98 5.2 * B 

63 3.3 * C 
109 5.8 * D 
166 8.8 * E 
259 13.8 * F 

45 2.4 * G 
1,123 59.7 * H 

Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

LTCCS Codebook SafeStat Data Set  324 


Codebook  SafeStat Data Set 

Format 

Type 

Length

Variable Name 

$50 

Char 

50

CategoryDescription 

Definition: Describes the SafeStat indicator value calculated for this carrier.
N

Prcnt 

Code 

Label
109 5.8 * ONLY ACCIDENT SEA >= 75
166 8.8 * ONLY DRIVER SEA >= 75

45 2.4 * ONLY SAFETY MANAGEMENT SEA >= 75 
259 13.8 * ONLY VEHICLE SEA >= 75

19 1.0 * SAFESTAT SCORE >= 350 

63 3.3 * SAFESTAT SCORE BETWEEN 150 AND 225 

98 5.2 * SAFESTAT SCORE BETWEEN 225 AND 350 
1,123 59.7 * SCORED - ALL SEAS < 75 

Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

LTCCS Codebook SafeStat Data Set  325 


Codebook  TruckExterior Data Set 

TruckExterior Data Set 

The TruckExterior data set contains information on each truck in the crash. Passenger vehicles 
involved in the crash are not included in this data set but instead are covered under VehicleExterior. 
This material is provided as one record per truck involved in the crash. 

The TruckExterior data set contains the variables CaseID, PSU, PSUStrat, RATWeight, and 
VehicleNumber. CaseID and VehicleNumber uniquely identify each record in this data set and 
should be used to merge the TruckExterior data set with vehicle level data sets. 

Format 

Type 

Length

Variable Name 

ML611F 

Numeric 

8

PowerUnitType 

Definition: Establishes the type of power unit involved in this crash. 

N 

Prcnt 

Code 

Label
354 28.5 1 Straight Truck
865 69.7 2 Tractor

16 1.3 7 Not Inspected 
6 0.5 9 Unknown 
Format 

Type 

Length

Variable Name 

ML4135F 

Numeric 

8

CabStyle 

Definition: Establishes the cab style of the power unit involved in the crash. 

N 

Prcnt 

Code 

Label 
1,106 89.1 1 Conventional 
101 8.1 2 Cab-over-engine 

8 0.6 3 Cab forward 
23 1.9 7 Not Inspected 
2 0.2 8 Other (specify) 
1 0.1 9 Unknown 
Format 

Type 

Length

Variable Name 

ML1158F 

Numeric 

8

DromedaryBox 

Definition: Establishes the presence of a dromedary box on the vehicle. A dromedary box is 
essentially a storage box that is typically mounted on the tractor chassis immediately rearward of the 
rear wall of the tractor cab. Access is typically located on the sides of the vehicle. These boxes are 
used to store tarps, tie-downs, tools, and the drivers personal gear. On occasion, dromedary boxes 
are utilized to haul cargo. 

N 

Prcnt 

Code 

Label 

52 4.2 1 Yes 
1,149 92.6 2 No 
23 1.9 8 Not Inspected 
17 1.4 99 Unknown 
LTCCS Codebook TruckExterior Data Set  326 


Codebook  TruckExterior Data Set 

Variable Name 

Format 

Type 

Length 

ML612F 

Numeric 

8

SleeperBerth 

Definition: Establishes the presence of a sleeper berth as an integral part of the cab structure. 
N 

Prcnt 

Code 

Label
549 44.2 1 Yes
659 53.1 2 No

23 1.9 8 Not Inspected 
10 0.8 99 Unknown 
Variable Name 

Format 

Type 

Length 

ML4134F 

Numeric 

8

BlindSpot 

Definition: Establishes links between the vehicles mirror system and crash causation.
N 

Prcnt 

Code 

Label 

19 1.5 1 Yes (Specify) 
1,149 92.6 2 No 
25 2.0 8 Not Inspected 
48 3.9 9 Unknown 
Variable Name 

Format 

Type 

Length 

ML1159F 

Numeric 

8

DataRecorder 

Definition: Establishes the presence of an engine control/data recorder unit. 
N Prcnt Code Label 
926 74.6 1 No 
52 4.2 2 Yes (specify) 
25 2.0 8 Not Inspected 
238 19.2 9 Unknown 
Variable Name 
RPM 
Format 
OT55F 
Type 
Numeric 
Length 
8 

Definition: Establishes the engine RPM as obtained from the trucks data recorder. 
N 

Prcnt 

Code 

Label 

1 0.1 1620 1620 
1 0.1 1740 1740 
1 0.1 2304 2304 
1 0.1 9995 EC/DR Unit Installed, No RPM Recording Capability 
926 74.6 9996 EC/DR Unit Not Installed 
LTCCS Codebook TruckExterior Data Set  327 


Codebook  TruckExterior Data Set 

N 

Prcnt 

Code 

Label 

25 2.0 9997 Not inpsected 
238 19.2 9998 Unknown if EC/DR Unit Installed 
48 3.9 9999 EC/DR Unit Installed, Unknown RPMs 
Variable Name 

Format 

Type 

Length 

OT57F 

Numeric 

8

TEXSpeed 

Definition: Establishes the speed (in kph) of the vehicle as indicated by information obtained from 
the trucks data recorder. 

N 

Prcnt 

Code 

Label 

1 0.1 0 0 
1 0.1 11 11 
1 0.1 89 89 
1 0.1 103 103 
1 0.1 108 108 
1 0.1 995 EC/DR Unit Installed, No Speed Recording Capability
926 74.6 996 EC/DR Unit Not Installed
25 2.0 997 Not Inspected
238 19.2 998 Unknown if EC/DR Unit Installed
46 3.7 999 EC/DR Unit Installed, Unknown Speed 
Format 

Type 

Length

Variable Name 

OT56F 

Numeric 

8

GearPosition 

Definition: Establishes the gear position of the truck as indicated by information obtained from the 
data recorder. 

N 

Prcnt 

Code 

Label 

1 0.1 1 1 
1 0.1 3 3 
1 0.1 4 4 
1 0.1 7 7 
1 0.1 9 9 
2 0.2 95 EC/DR Unit Installed, No Gear Position Recording Capability
926 74.6 96 EC/DR Unit Not Installed
25 2.0 97 Not Inspected
238 19.2 98 Unknown if EC/DR Unit Installed
45 3.6 99 EC/DR Unit Installed, Unknown Gear Position 
LTCCS Codebook TruckExterior Data Set  328 


Codebook  TruckExterior Data Set 

Format 

Type 

Length

Variable Name 

OT58F 

Numeric 

8

TrailerCount 

Definition: Establishes the number of trailers that are included in the vehicle configuration. 

N 

Prcnt 

Code 

Label 

29 2.3 0 No Trailer *and* Power Unit Not Straight Truck 
824 66.4 1 1 

57 4.6 2 2 
310 25.0 7 Straight Truck With No Trailers

21 1.7 8 Not Inspected 

Format 

Type 

Length

Variable Name 

OT29F 

Numeric 

8

TEXEmptyWeight 

Definition: Establishes the combined total empty weight (kilograms) for all units in the truck 
configuration. The empty weight for each unit is specified by the units manufacturer. 

N 

Prcnt 

Code 

Label 

1 0.1 2404 2404 

1 0.1 2420 2420 

1 0.1 2737 2737 

1 0.1 3164 3164 

1 0.1 3167 3167 

1 0.1 3175 3175 

1 0.1 3181 3181 

1 0.1 3196 3196 

1 0.1 3339 3339 

1 0.1 3362 3362 
------------------------------

1 0.1 22934 22934 

1 0.1 23098 23098 

1 0.1 23134 23134 

1 0.1 23927 23927 

1 0.1 25104 25104 

1 0.1 25548 25548 

1 0.1 26250 26250 

1 0.1 28576 28576 

26 2.1 777777 Not inspected
199 16.0 999999 Unknown 

LTCCS Codebook TruckExterior Data Set  329 


Codebook  TruckExterior Data Set 

Format 

Type 

Length

Variable Name 

OT29F 

Numeric 

8

CMDBCargoWeight 

Definition: Establishes the total weight (kilograms) of all cargo in all trailers combined. This value 
represents payload cargo only, not the weight of the trailer, the driver, or the drivers personal effects. 

N 

Prcnt 

Code 

Label 

1 0.1 9 9 

1 0.1 14 14 

2 0.2 23 23 

1 0.1 34 34 

5 0.4 45 45 

1 0.1 68 68 

1 0.1 75 75 

2 0.2 91 91 

3 0.2 113 113 

1 0.1 136 136 
------------------------------

1 0.1 39010 39010 

1 0.1 39508 39508 

1 0.1 41822 41822 

1 0.1 43872 43872 

1 0.1 45360 45360 

1 0.1 48988 48988 

1 0.1 49743 49743 

1 0.1 63504 63504 

26 2.1 777777 Not inspected
592 47.7 999999 Unknown 

Format 

Type 

Length

Variable Name 

OT29F 

Numeric 

8

TOTALGVWR 

Definition: This is the total combined gross vehicle weight rating (in kilograms) for all units of the 
truck configuration. The GVWR is specified by the manufacturer and represents the sum of the 
weights each axle within a unit is designed to carry. 

N 

Prcnt 

Code 

Label 

1 0.1 4536 4536 

1 0.1 5012 5012 

2 0.2 5443 5443 

1 0.1 5897 5897 

2 0.2 6010 6010 

2 0.2 6350 6350 

1 0.1 6373 6373 

1 0.1 6396 6396 

LTCCS Codebook TruckExterior Data Set  330 


Codebook  TruckExterior Data Set 

N Prcnt Code Label 
1 0.1 6460 6460 
1 0.1 6463 6463 
------------------------------
1 0.1 84863 84863 
1 0.1 87984 87984 
1 0.1 88579 88579 
1 0.1 94802 94802 
1 0.1 95935 95935 
1 0.1 96163 96163 
1 0.1 97977 97977 
1 0.1 104554 104554 
26 2.1 777777 Not inspected 
221 17.8 999999 Unknown 
Variable Name Format Type Length 
TEXConfiguration $15 Char 15 

Definition: Provides a summary of the configuration of the rig. Letter codes are strung together 
(listed from left to right) to represent the order of equipment in the rig. For example, a tractor pulling 
two trailers connected by an A-dolly would have a configuration of TSAS. 

N 

Prcnt 

Code 

Label 

1 0.1 ISS ISS 
22 1.8 Not Insp Not Insp
309 24.9 R R 
20 1.6 RF RF 
24 1.9 RO RO 
1 0.1 ROO ROO 
29 2.3 T T 
6 0.5 TO TO
773 62.3 TS TS
1 0.1 TSA TSA 
22 1.8 TSAS TSAS 
2 0.2 TSCS TSCS 
29 2.3 TSF TSF 
2 0.2 TSXS TSXS 
LTCCS Codebook TruckExterior Data Set  331 


Codebook  TruckExterior Data Set 

Format 

Type 

Length

Variable Name 

OT54F 

Numeric 

8

TEXTotalLength 

Definition: Establishes the total length (meters) of the entire truck configuration. Due to overlapping 
vehicle connection points, the total length of the vehicle configuration will be less than the sum of the 
unit lengths. 

N 

Prcnt 

Code 

Label 

1 0.1 3 3 

6 0.5 5 5 

33 2.7 6 6 

28 2.3 7 7 

77 6.2 8 8 

63 5.1 9 9 

64 5.2 10 10 

39 3.1 11 11 

27 2.2 12 12 

25 2.0 13 13 

17 1.4 14 14 

17 1.4 15 15 

22 1.8 16 16 

44 3.5 17 17 

79 6.4 18 18 

98 7.9 19 19
110 8.9 20 20
128 10.3 21 21
133 10.7 22 22

42 3.4 23 23 

19 1.5 24 24 

10 0.8 25 25 

3 0.2 26 26 

4 0.3 27 27 

1 0.1 28 28 

1 0.1 29 29 

2 0.2 30 30 

3 0.2 32 32 

1 0.1 50 50 

16 1.3 77 Not inspected
128 10.3 99 Unknown 

LTCCS Codebook TruckExterior Data Set  332 


Codebook  TruckExterior Data Set 

Format 

Type 

LengthVariable Name 

OT47F 

Numeric 

8 

Definition: Establishes whether or not the trailer unit was placarded (i.e. had warning symbol on it), 
indicating the trailer was carrying hazardous cargo. 

PlacardRequired 

N Prcnt Code Label 
887 71.5 0 No Placard Required 
53 4.3 1 Yes, Placard Required 
26 2.1 8 Not Inspected 
275 22.2 9 Unknown 

Variable Name 

Format 

Type 

Length 

OT59F 

Numeric 

8

MirrorCount 

Definition: Establishes the total number of mirrors on the truck configuration. 

N 

Prcnt 

Code 

Label 

35 2.8 1 1 
768 61.9 2 2 
164 13.2 3 3 
205 16.5 4 4 
1 0.1 5 5 
26 2.1 7 Not Inspected 
42 3.4 9 Unknown 
Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

RightDoorMirror 

Definition: Establishes whether or not the trucks power unit has an exterior mirror mounted on its 
right door. (Was originally an attribute choice under the variable Exterior Mirror Location.) 

N 

Prcnt 

Code 

Label 

53 4.3 0 Absent 
1,120 90.2 1 Present 
26 2.1 7 Not Inspected 
42 3.4 9 Unknown 
LTCCS Codebook TruckExterior Data Set  333 


Codebook  TruckExterior Data Set 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

LeftDoorMirror 

Definition: Establishes whether or not the trucks power unit has an exterior mirror mounted on its 
left door. (This variable was originally an attribute choice under the variable Exterior Mirror 
Location.) 

N 

Prcnt 

Code 

Label 

50 4.0 0 Absent 
1,123 90.5 1 Present 
26 2.1 7 Not Inspected 
42 3.4 9 Unknown 
Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

RightFenderMirror 

Definition: Establishes whether or not the trucks power unit has an exterior mirror mounted on its 
right fender. (This variable was originally an attribute choice under the variable Exterior Mirror 
Location.) 

N 

Prcnt 

Code 

Label
817 65.8 0 Absent
356 28.7 1 Present

26 2.1 7 Not Inspected 
42 3.4 9 Unknown 
Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

LeftFenderMirror 

Definition: Establishes whether or not the trucks power unit has an exterior mirror mounted on its 
left fender. (This variable was originally an attribute choice under the variable Exterior Mirror 
Location.) 

N 

Prcnt 

Code 

Label
947 76.3 0 Absent
226 18.2 1 Present

26 2.1 7 Not Inspected 
42 3.4 9 Unknown 
LTCCS Codebook TruckExterior Data Set  334 


Codebook  TruckExterior Data Set 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

OtherLocationMirror 

Definition: Establishes whether or not the trucks power unit has an exterior mirror mounted on 
locations other than its doors or fenders. (This variable was originally an attribute choice under the 
variable Exterior Mirror Location and was the Other (specify): attribute choice.) 

N 

Prcnt 

Code 

Label 
1,110 89.4 0 Absent 

63 5.1 1 Present 
26 2.1 7 Not Inspected 
42 3.4 9 Unknown 
Variable Name 

Format 

Type 

Length 

OT59F 

Numeric 

8

ITSCount 

Definition: Establishes the total number of ITS equipment on the truck.
N 

Prcnt 

Code 

Label 
1,065 85.8 0 0 

23 1.9 1 1 
1 0.1 2 2 
1 0.1 3 3 
26 2.1 7 Not Inspected
125 10.1 9 Unknown 
Variable Name 

Format 

Type 

Length 

AP1U 

Numeric 

8

ITSHeadway

Definition: Establishes whether or not a headway detection unit is installed in the cab of the vehicle 
and is functional. These units are intended to assist the driver in avoiding rear-end crashes. While 
several operational modes are in active use, all of these units measure the gap distance to a 
vehicle/object located forward of the drivers position. When the gap distance diminishes to a 
pre-selected unacceptable level, the unit issues an auditory alert to the driver. (Was originally an 
attribute choice under the variable ITS Equipment Installed.) 

N 

Prcnt 

Code 

Label 
1,088 87.7 0 Absent 

2 0.2 1 Present 
26 2.1 7 Not Inspected
125 10.1 9 Unknown 
LTCCS Codebook TruckExterior Data Set  335 


Codebook  TruckExterior Data Set 

Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

ITSSideObject 

Definition: Establishes whether or not a side/object detection unit is installed in the cab of the 
vehicle and is functional. These units are intended to assist the driver in avoiding side impacts as a 
result of intruding into adjacent lanes or as a result of other vehicles intruding into the truck lanes. 
These units are also useful with respect to avoiding obstacles while backing. While several 
operational modes are in active use, all of these units typically issue alerts when clearances to the 
sides of the vehicle diminish to unacceptable levels. (This variable was originally an attribute choice 
under the variable ITS Equipment Installed.) 

N 

Prcnt 

Code 

Label 
1,088 87.7 0 Absent 

2 0.2 1 Present 
26 2.1 7 Not Inspected
125 10.1 9 Unknown 
Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

ITSRollover 

Definition: Establishes whether or not a rollover warning unit is installed in the cab of the vehicle 
and is functional. While several operational modes are in active use, these devices typically measure 
lateral acceleration and issue an alert to the driver when these forces rise to a level that may create 
an unstable condition. (This variable was originally an attribute choice under the variable ITS 
Equipment Installed.) 

N 

Prcnt 

Code 

Label 
1,089 87.8 0 Absent 

1 0.1 1 Present 
26 2.1 7 Not Inspected
125 10.1 9 Unknown 
Format 

Type 

Length

Variable Name 

AP1U 

Numeric 

8

ITSOther 

Definition: Establishes whether or not other ITS equipment (other than headway detection units, 
side/object detection units, and rollover warning units) is installed in the cab of the vehicle and is 
functional. (This variable was originally an attribute choice under the variable ITS Equipment 
Installed and was the Other (specify): attribute choice.) 

N 

Prcnt 

Code 

Label 
1,087 87.6 0 Absent 

3 0.2 1 Present 
26 2.1 7 Not Inspected
125 10.1 9 Unknown 
LTCCS Codebook TruckExterior Data Set  336 


Codebook  TruckInspection Data Set 

TruckInspection Data Set 

The TruckInspection data set combines information on Federal inspection violations. There may be 
more than one record per truck. Each record represents a violation. 

The TruckInspection data set contains the variables CaseID, PSU, PSUStrat, RATWeight, and 
VehicleNumber. CaseID, VehicleNumber, TINPosition and TINViolationCode uniquely identify each 
record in this data set. CaseID and VehicleNumber should be used to merge the TruckInspection 
data set with the TruckExterior data set and other vehicle level data sets. CaseID, VehicleNumber 
and TINPosition should be used to merge the TruckInspection data set with the TruckUnits data set. 

Variable Name 

Format 

Type 

Length 

BEST8 

Numeric 

8

TINPosition 

Definition: Indicates which unit in the truck configuration received a specific violation, based on its 
position in the trucks configuration. 

N Prcnt Code Label 
2,497 77.0 1 1 
685 21.1 2 2 
59 1.8 3 3 

Variable Name 

Format 

Type 

Length 

$OT48F 

Char 

15

TINViolationCode 

Definition: Indicates the numerical violation code as it corresponds to a specific violation. These 
codes are found in the Federal Motor Carrier Safety Regulations Code of Federal Regulations, Title 
49. 

N 

Prcnt 

Code 

Label 

1 0.0 13901 Operating w/o proper motor carrier authority 
1 0.0 13906 Oper w/o proper insurance or other securities 
1 0.0 171.2B Failed to comply with exemption 
1 0.0 172.200A No shipping paper provided offeror 
1 0.0 172.332 ID# marking for (b) panel (c) placards 
2 0.1 172.502A1 Prohibited placarding 
1 0.0 172.516C6 Placard damaged, deteriorated, or obscured 
1 0.0 172.602A ER info missing 
1 0.0 173.24B1 Release of HM from package 
2 0.1 177.817A No shipping papers (carrier) 
------------------------------
7 0.2 396.3A1BC Brake-air compressor violation 
3 0.1 396.3A1BD Brake-defective brake drum 
6 0.2 396.3A1BL Brake-reserve system pressure loss 
13 0.4 396.3A1T Tires (general) 
12 0.4 396.5 Excessive oil leaks 
15 0.5 396.5B Oil and/or grease leak 
LTCCS Codebook TruckInspection Data Set  337 


Codebook  TruckInspection Data Set 

N 

Prcnt 

Code 

Label 

6 0.2 396.7 Unsafe operations forbidden 
1 0.0 396.9D2 Failure to correct defects noted on insp 
1 0.0 398.6 Violation of hours of service reg-migrant 
2 0.1 399.207 Vehicle access requirements violations 
Variable Name 

Format 

Type 

Length 

ML618F 

Numeric 

8

ViolationType 

Definition: Indicates if a violation was in effect prior to the crash, or if the violation was a result of the 
crash. 

N 

Prcnt 

Code 

Label 

2,195 67.7 1 Pre-crash 

112 3.5 2 No 

856 26.4 3 Crash Related 

78 2.4 999 Unknown 
Variable Name 

Format 

Type 

Length 

ML617F 

Numeric 

8

TINOutOfService 

Definition: Indicates whether or not a specific violation was classified as out-of-service. 

N Prcnt Code Label 
1,088 33.6 1 Yes 
2,150 66.3 2 No 
3 0.1 9 Unknown 

Variable Name 

Format 

Type 

Length 

ML640F 

Numeric 

8

TINDisposition 

Definition: Establishes the disposition of the truck as indicated by violations found during the 
FMCSA truck inspection. 

N 

Prcnt 

Code 

Label 

87 2.7 1 Repaired at Scene 
1,996 61.6 2 Towed/Escorted 
142 4.4 3 Other (Specify) 
787 24.3 8 Not Applicable 
229 7.1 9 Unknown 

LTCCS Codebook TruckInspection Data Set  338 


Codebook  TruckUnits Data Set 

TruckUnits Data Set 

The TruckUnits data set contains detailed information about each unit involved in the crash. This 
includes both power units and trailers, where applicable, as indicated by the position field, which is 
part of the key of this data set. This material is provided as one record per truck unit. 

The TruckUnits data set contains the variables CaseID, PSU, PSUStrat, RATWeight, and 
VehicleNumber. CaseID, VehicleNumber and TUNPosition uniquely identify each record in this data 
set. CaseID and VehicleNumber should be used to merge the TruckUnits data set with the 
TruckExterior data set and other vehicle level data sets. CaseID, VehicleNumber and TUNPosition 
should be used to merge the TruckUnits data set with the TruckInspection data set. 

Variable Name 

Format 

Type 

Length 

BEST8 

Numeric 

8

TUNPosition 

Definition: Identifies the position of a particular unit within the vehicle configuration. Position 1 
should identify a straight truck or a power unit in a multiple combination, with each trailer then 
assigned the next number as it moves away from the power unit. 

N Prcnt Code Label 
1,241 57.0 1 1 
881 40.4 2 2 
57 2.6 3 3 

Format 

Type 

Length

Variable Name 

ML639F 

Numeric 

8

TUNUnitType 

Definition: Describes the unit type for each unit in the vehicle configuration.
N 

Prcnt 

Code 

Label
859 39.4 1 Semi

49 2.2 2 Full 
1,220 56.0 3 Power unit 
22 1.0 6 Not Inspected 
28 1.3 8 Other (specify) 
1 0.0 9 Unknown 
Variable Name 

Format 

Type 

Length 

ML620F 

Numeric 

8

TUNBodyType 

Definition: Establishes the type of trailer unit/cargo body identified within the vehicle configuration. 
If the vehicle is a straight truck, this designation is also used to describe the body type of the straight 
truck (e.g. cement mixer). 

N 

Prcnt 

Code 

Label
451 20.7 1 Van

33 1.5 2 Open top van
123 5.6 3 Refrigerated van
LTCCS Codebook TruckUnits Data Set  339 


Codebook  TruckUnits Data Set 

N 

Prcnt 

Code 

Label 

5 0.2 4 Livestock carrier
163 7.5 5 Flatbed
14 0.6 6 Low boy 
14 0.6 7 Flatbed with equipment 
23 1.1 8 Flatbed with sides 
14 0.6 9 Pole/logging 
68 3.1 10 Tank-liquid 
1 0.0 11 Tank-compressed gas 
20 0.9 12 Tank-dry bulk 
8 0.4 13 Auto carrier
199 9.1 14 Dump
28 1.3 15 Bottom dump/hopper bottom 
45 2.1 16 Garbage/refuse 
24 1.1 17 Cement mixer 
63 2.9 18 Other (specify)
855 39.2 77 Not applicable (includes tractor power unit)
22 1.0 88 Not Inspected 
6 0.3 99 Unknown 
Format 

Type 

Length

Variable Name 

ML623F 

Numeric 

8

CargoType 

Definition: Establishes the type of cargo carried in each unit of the vehicle configuration. A tractor 
power unit is normally classified with the Not applicable designation since these units typically do 
not carry cargo. For the unusual circumstance where a tractor power unit is carrying cargo, either the 
Tractor power unit with container cargo or Tractor power unit with other bulk cargo (specify): 
designations are used as appropriate. 

N 

Prcnt 

Code 

Label
351 16.1 0 Empty
293 13.4 1 General freight

22 1.0 2 Household goods 
63 2.9 3 Building materials 
41 1.9 4 Metal (coil, sheets) 
21 1.0 5 Heavy machinery 
29 1.3 6 Large objects 
10 0.5 7 Motor vehicles 
3 0.1 8 Piggyback/tow-away 
6 0.3 9 Gases in bulk
235 10.8 10 Solids in bulk
49 2.2 11 Liquids in bulk 
15 0.7 13 Logs, poles, lumber 
74 3.4 14 Refrigerated foods 
LTCCS Codebook TruckUnits Data Set  340 


Codebook  TruckUnits Data Set 

N Prcnt Code Label 
4 0.2 15 Mobile home 
32 1.5 16 Farm products 
6 0.3 17 Live animals 
7 0.3 18 Other (specify): 
862 39.6 77 Not applicable 
26 1.2 88 Not Inspected 
30 1.4 99 Unknown 
Variable Name Format Type Length 
TUNVIN $10 Char 10 

Definition: Establishes the Vehicle Identification Number (VIN) for each unit in the vehicle 

configuration. 

N 

Prcnt 

Code 

Label 

1 0.0 * 0016 
1 0.0 * 0125A 
1 0.0 * 0M17609C 
1 0.0 * 0T3A110004 
1 0.0 * 0T3A113004 
1 0.0 * 102955 
1 0.0 * 107294N 
1 0.0 * 10BBA72Y4Y 
1 0.0 * 10BFB72T8X 
1 0.0 * 10BFS6210D 
------------------------------
1 0.0 * UNV623301 
1 0.0 * Unknown 
1 0.0 * V30363 
1 0.0 * VG6BA01A4J 
1 0.0 * VG6M114B7G 
1 0.0 * VG6M116A9Y 
1 0.0 * WA89149779 
1 0.0 * WA94182673 
1 0.0 * WN63222274 
1 0.0 * X127269 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

LTCCS Codebook TruckUnits Data Set  341 


Codebook  TruckUnits Data Set 

Format 

Type 

Length

Variable Name 

$OT50F 

Char 

8

ManufactureDate 

Definition: Establishes the month and year in which each unit in the vehicle configuration was 

manufactured. 

N 

Prcnt 

Code 

Label 

14 0.6 * 01/00 
6 0.3 * 01/01 
9 0.4 * 01/02 
5 0.2 * 01/03 
1 0.0 * 01/60 
1 0.0 * 01/74 
1 0.0 * 01/75 
1 0.0 * 01/76 
1 0.0 * 01/77 
2 0.1 * 01/79 
------------------------------
4 0.2 * 12/92 
3 0.1 * 12/93 
4 0.2 * 12/94 
8 0.4 * 12/95 
8 0.4 * 12/96 
10 0.5 * 12/97 
12 0.6 * 12/98 
12 0.6 * 12/99 
26 1.2 88/88 Not Inspected
819 37.6 99/99 Unknown 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Format 

Type 

Length

Variable Name 

OT29F 

Numeric 

8

TUNEmptyWeight 

Definition: Establishes the empty weight (kilograms) for each unit of the vehicle configuration. This 
value represents the empty weight of each unit as specified by the units manufacturer. 

N 

Prcnt 

Code 

Label 

4 0.2 2200 2200 
1 0.0 2404 2404 
1 0.0 2420 2420 
1 0.0 2422 2422 
1 0.0 2495 2495 
1 0.0 2558 2558 
1 0.0 2563 2563 
1 0.0 2586 2586 
LTCCS Codebook TruckUnits Data Set  342 


Codebook  TruckUnits Data Set 

N Prcnt Code Label 
9 0.4 2722 2722 
1 0.0 2735 2735 
------------------------------
1 0.0 17350 17350 
1 0.0 17950 17950 
1 0.0 18280 18280 
1 0.0 18281 18281 
1 0.0 18300 18300 
1 0.0 19573 19573 
1 0.0 19913 19913 
1 0.0 28576 28576 
27 1.2 888888 Not inspected 
264 12.1 999999 Unknown 
Variable Name Format Type Length 
TUNCargoWeight OT29F Numeric 8 

Definition: Establishes the weight (kilograms) of the cargo transported in each unit of the vehicle 
configuration. This value represents the payload associated with each unit of the vehicle 
combination. Payload is the total weight of the unit and cargo minus the weight of the unit before the 
cargo is loaded. Payload does not include miscellaneous items in the cab or dromedary box of 
power units or other items such as chains and tie downs. 

N 

Prcnt 

Code 

Label
343 15.7 0 0 

1 0.0 9 9 
1 0.0 14 14 
2 0.1 23 23 
1 0.0 34 34 
7 0.3 45 45 
2 0.1 68 68 
1 0.0 75 75 
2 0.1 91 91 
2 0.1 113 113 
------------------------------
1 0.0 35127 35127 
2 0.1 35381 35381 
1 0.0 35834 35834 
1 0.0 36764 36764 
1 0.0 39009 39009 
1 0.0 39508 39508 
1 0.0 41822 41822
856 39.3 888887 Not applicable
LTCCS Codebook TruckUnits Data Set  343 


Codebook  TruckUnits Data Set 

N 

Prcnt 

Code 

Label 

26 1.2 888888 Not inspected 
283 13.0 999999 Unknown 

Variable Name 

Format 

Type 

Length 

OT29F 

Numeric 

8

GVWR 

Definition: Establishes the Gross Vehicle Weight Rating (GVWR, in kilograms) for each unit of the 
vehicle configuration. The GVWR is specified by the manufacturer and represents the sum of the 
weights each axle within a unit is designed to carry. 

N 

Prcnt 

Code 

Label 

2 0.1 4536 4536 

1 0.0 5012 5012 

1 0.0 5216 5216 

1 0.0 5307 5307 

1 0.0 5440 5440 

2 0.1 5443 5443 

1 0.0 5489 5489 

2 0.1 5897 5897 

2 0.1 6010 6010 

1 0.0 6123 6123 
------------------------------

1 0.0 49360 49360 

1 0.0 50349 50349 

1 0.0 50803 50803 

1 0.0 53071 53071 

1 0.0 53524 53524 

1 0.0 54885 54885 

1 0.0 54890 54890 

1 0.0 59213 59213 

26 1.2 888888 Not inspected
284 13.0 999999 Unknown 

Variable Name 

Format 

Type 

Length 

OT28F14.1 

Numeric 

8

TUNTotalLength 

Definition: Establishes the length (in meters) of each unit of the vehicles configuration. Unit lengths 
are established by measuring from the furthest forward projection to the furthest rearward projection. 

N 

Prcnt 

Code 

Label 

1 0.0 3.9 3.9 

1 0.0 4.1 4.1 

1 0.0 4.3 4.3 

1 0.0 4.5 4.5 

LTCCS Codebook TruckUnits Data Set  344 


Codebook  TruckUnits Data Set 

N Prcnt Code Label 
5 0.2 4.6 4.6 
3 0.1 4.7 4.7 
5 0.2 4.8 4.8 
1 0.0 4.9 4.9 
7 0.3 5 5.0 
3 0.1 5.2 5.2 
------------------------------
1 0.0 19.1 19.1 
1 0.0 19.7 19.7 
3 0.1 20.7 20.7 
1 0.0 20.8 20.8 
1 0.0 22.9 22.9 
1 0.0 23.6 23.6 
1 0.0 24.3 24.3 
1 0.0 26 26.0 
27 1.2 7777 Not Inspected 
146 6.7 9999 Unknown 
Variable Name Format Type Length 
CapacityPercent OT36F Numeric 8 

Definition: Establishes the proportion of available cargo space that is used to transport cargo in 
each unit of the vehicle configuration. The reported percentages are subjective estimates of the total 
available space that is used. 

N 

Prcnt 

Code 

Label
352 16.2 0 0 

11 0.5 1 1 
1 0.0 2 2 
1 0.0 4 4 
14 0.6 5 5 
1 0.0 8 8 
20 0.9 10 10 
1 0.0 11 11 
1 0.0 12 12 
7 0.3 15 15 
-------------------------------
3 0.1 93 93 
2 0.1 94 94 
18 0.8 95 95 
67 3.1 96 96 
6 0.3 97 97 
8 0.4 98 98 
LTCCS Codebook TruckUnits Data Set  345 


Codebook  TruckUnits Data Set 

N 

Prcnt 

Code 

Label 

3 0.1 99 99 
290 13.3 100 100 

26 1.2 777 Not Inspected 
862 39.6 888 Not applicable 
174 8.0 999 Unknown 

Format 

Type 

Length

Variable Name 

OT38F 

Numeric 

8

TankCapacity

Definition: Is used with tankers (liquid loads) and establishes the total capacity (liters) of that 
particular tank. 

N 

Prcnt 

Code 

Label 

1 0.0 3407 3407 

1 0.0 5678 5678 

1 0.0 5700 5700 

1 0.0 10409 10409 

2 0.1 13248 13248 

1 0.0 13626 13626 

1 0.0 17396 17396 

1 0.0 17411 17411 

1 0.0 20276 20276 

1 0.0 20439 20439 

1 0.0 20441 20441 

1 0.0 24224 24224 

1 0.0 24603 24603 

1 0.0 24605 24605 

1 0.0 25360 25360 

1 0.0 25738 25738 

3 0.1 26495 26495 

1 0.0 28766 28766 

1 0.0 33600 33600 

2 0.1 34065 34065 

1 0.0 35201 35201 

1 0.0 35390 35390 

1 0.0 35579 35579 

5 0.2 35958 35958 

1 0.0 38986 38986 

1 0.0 42771 42771 
2,104 96.6 88887 Not Applicable 

26 1.2 88888 Not Inspected 

15 0.7 99999 Unknown 

LTCCS Codebook TruckUnits Data Set  346 


Codebook  TruckUnits Data Set 

Format 

Type 

Length

Variable Name 

OT38F 

Numeric 

8

TankLoad 

Definition: Is used with tankers (liquid load) and establishes the total load (liters) being carried in 
that particular tank at the time of the crash. 

N 

Prcnt 

Code 

Label 

1 0.0 1893 1893 

1 0.0 4020 4020 

1 0.0 5616 5616 

1 0.0 5678 5678 

1 0.0 7040 7040 

1 0.0 8327 8327 

1 0.0 8531 8531 

1 0.0 10542 10542 

1 0.0 13248 13248 

1 0.0 13418 13418 

1 0.0 15899 15899 

1 0.0 16166 16166 

1 0.0 17396 17396 

1 0.0 19069 19069 

1 0.0 20201 20201 

1 0.0 20363 20363 

1 0.0 21386 21386 

1 0.0 21790 21790 

1 0.0 24118 24118 

1 0.0 24160 24160 

1 0.0 29145 29145 

1 0.0 30280 30280 

1 0.0 30659 30659 

1 0.0 31045 31045 

1 0.0 31416 31416 

1 0.0 32173 32173 

1 0.0 33301 33301 

1 0.0 33308 33308 

1 0.0 33664 33664 

1 0.0 33762 33762 

2 0.1 34065 34065 

1 0.0 37850 37850 

1 0.0 49205 49205 
2,105 96.6 88887 Not Applicable 

26 1.2 88888 Not Inspected 

14 0.6 99999 Unknown 

LTCCS Codebook TruckUnits Data Set  347 


Codebook  TruckUnits Data Set 

Format 

Type 

Length

Variable Name 

ML627F 

Numeric 

8

Hazard 

Definition: Establishes the presence of hazardous cargo in each unit of the vehicle configuration. A 
cargo is hazardous if it is corrosive, explosive, flammable, or radioactive. This includes all petroleum 
products except motor oil in cans and finished plastics. If the cargo was required by law to be 
placarded (i.e. warning symbol), it should be classified as hazardous. 

N Prcnt Code Label 
52 2.4 1 Yes 
1,226 56.3 2 No 
867 39.8 7 Not applicable 
24 1.1 8 Not Inspected 
10 0.5 9 Unknown 

Variable Name 

Format 

Type 

Length 

ML622F 

Numeric 

8

TUNSpillage 

Definition: Establishes the occurrence of cargo spillage during the crash sequence. To qualify, the 
cargo spillage must occur as a result of or following the first harmful event. Spillage of fuel from the 
involved vehicles and the scattering of debris from the crash are not considered cargo spillage. 
Similarly, cargo spillage that occurs prior to the first harmful event (i.e. pre-crash phase) is not 
considered applicable to this variable. 

N 

Prcnt 

Code 

Label 
1,057 48.5 0 No spillage 
205 9.4 1 Non-hazardous spillage 

18 0.8 2 Hazardous spillage
867 39.8 7 Not applicable
24 1.1 8 Not Inspected 
8 0.4 9 Unknown 
Format 

Type 

Length

Variable Name 

OT53F 

Numeric 

8

AxlesUsed 

Definition: Establishes the number of axles in use for each unit of the vehicle configuration. This 
number does not include lift axles that are up and therefore, not in use at the time of the crash. 

N 

Prcnt 

Code 

Label 

73 3.4 1 1 
1,032 47.4 2 2 
974 44.7 3 3 

53 2.4 4 4 
6 0.3 5 5 
6 0.3 6 6 
25 1.1 7 Not Inspected 
10 0.5 9 Unknown 
LTCCS Codebook TruckUnits Data Set  348 


Codebook  TruckUnits Data Set 

Variable Name 

Format 

Type 

Length 

OT36F 

Numeric 

8

AxlesNotUsed 

Definition: Establishes the number of axles that were lifted and not in use at the time of the crash. 
The number of lift axles is reported for each unit of the vehicle configuration. 

N 

Prcnt 

Code 

Label 
1,928 88.5 0 0 

84 3.9 1 1 
4 0.2 2 2 
1 0.0 3 3 
26 1.2 777 Not Inspected
123 5.6 888 Not applicable
13 0.6 999 Unknown 
Variable Name 

Format 

Type 

Length 

OT36F 

Numeric 

8

SteerableAxles 

Definition: Establishes the number of steer axles (including self-aligning steer axles) on each unit 
within the configuration. For most articulated vehicles on U.S. trafficways, there will typically be one 
steer axle within the configuration (i.e. the front steer axle of the tractor unit). Within those 
configurations that utilize a C-dolly however, there can be self-aligning axles on the C-dolly. 

N 

Prcnt 

Code 

Label 
832 38.2 0 0 
1,259 57.8 1 1 

11 0.5 2 2 
25 1.1 777 Not Inspected 
45 2.1 888 Not applicable 
7 0.3 999 Unknown 
Variable Name 

Format 

Type 

Length 

ML632F 

Numeric 

8

RearTapeCond 

Definition: Establishes the condition of the tape on the rear of each trailer/cargo body. For this 
variable, tape condition factors are limited to visibility issues (e.g. clean/dirty). 

N 

Prcnt 

Code 

Label
333 15.3 0 No tape
372 17.1 1 Clean
390 17.9 2 Some dirt
106 4.9 3 Very dirty
862 39.6 7 Not applicable

25 1.1 8 Not Inspected 
91 4.2 9 Unknown 
LTCCS Codebook TruckUnits Data Set  349 


Codebook  TruckUnits Data Set 

Variable Name 

Format 

Type 

Length 

ML633F 

Numeric 

8

SideTapeCond 

Definition: Establishes the condition of the tape on the sides of each trailer/cargo body. For this 
variable, tape condition factors are limited to visibility issues (e.g. clean/dirty). 

N 

Prcnt 

Code 

Label
327 15.0 0 No tape
441 20.2 1 Clean
379 17.4 2 Some dirt

60 2.8 3 Very dirty
862 39.6 7 Not applicable
25 1.1 8 Not Inspected 
85 3.9 9 Unknown 
Variable Name 

Format 

Type 

Length 

ML638F 

Numeric 

8

ReflectTapeType 

Definition: Establishes the use/presence of retroflective tape to improve truck conspicuity. It should 
be noted that the first unit in the vehicle configuration for this variable is designated as the power unit 
cargo body. This designation refers to the cargo body of a straight truck. If the power unit is a tractor, 
the Not applicable designation would typically be used. 

N 

Prcnt 

Code 

Label
286 13.1 0 No
933 42.8 1 Yes
862 39.6 7 Not applicable

25 1.1 8 Not Inspected 
73 3.4 9 Unknown 
Variable Name 

Format 

Type 

Length 

ML634F 

Numeric 

8

ReflectTapePattern 

Definition: Establishes the pattern of tape markings that are present. 
N 

Prcnt 

Code 

Label
286 13.1 0 No tape
900 41.3 1 Side/rear per FMVSS 108 or similar

24 1.1 6 Not Inspected
862 39.6 7 Not applicable
32 1.5 8 Other pattern (specify): 
75 3.4 9 Unknown 
LTCCS Codebook TruckUnits Data Set  350 


Codebook  TruckUnits Data Set 

Format 

Type 

Length

Variable Name 

ML631F 

Numeric 

8

ReflectTapeColor 

Definition: Establishes the color of tape markings that are present. 

N 

Prcnt 

Code 

Label
286 13.1 0 No tape
930 42.7 1 Red/white per FMVSS 108

25 1.1 6 Not Inspected
862 39.6 7 Not applicable

1 0.0 8 Other color (specify): 

75 3.4 9 Unknown 

Format 

Type 

Length

Variable Name 

OT36F 

Numeric 

8

UnderrideTapePeel 

Definition: Establishes the proportion of tape on the rear underride guard that is peeling or 
damaged. 

N 

Prcnt 

Code 

Label
468 21.5 0 0 

3 0.1 1 1 

12 0.6 2 2 

2 0.1 3 3 

1 0.0 4 4 

67 3.1 5 5 

41 1.9 10 10 

5 0.2 15 15 

23 1.1 20 20 

12 0.6 25 25 
-------------------------------

5 0.2 76 76 

2 0.1 80 80 

4 0.2 90 90 

3 0.1 95 95 

1 0.0 97 97 

2 0.1 99 99 

10 0.5 100 100
480 22.0 666 No tape

25 1.1 777 Not Inspected
862 39.6 888 Not applicable
103 4.7 999 Unknown 

LTCCS Codebook TruckUnits Data Set  351 


Codebook  TruckUnits Data Set 

Format 

Type 

Length

Variable Name 

OT36F 

Numeric 

8

RearTapePeel 

Definition: Establishes the proportion of the tape on the rear area of each unit (excluding the 
underride guard) that is peeling or damaged. 

N 

Prcnt 

Code 

Label
642 29.5 0 0 

2 0.1 1 1 

15 0.7 2 2 

2 0.1 3 3 

2 0.1 4 4 

69 3.2 5 5 

43 2.0 10 10 

2 0.1 15 15 

1 0.0 17 17 

14 0.6 20 20 
-------------------------------

2 0.1 75 75 

2 0.1 76 76 

5 0.2 80 80 

3 0.1 90 90 

1 0.0 95 95 

4 0.2 100 100
334 15.3 666 No tape

25 1.1 777 Not Inspected
862 39.6 888 Not applicable

96 4.4 999 Unknown 

Variable Name 

Format 

Type 

Length 

OT36F 

Numeric 

8

SideTapePeel 

Definition: Establishes the proportion of the tape on the sides of the trailer that is peeling or 
damaged. 

N 

Prcnt 

Code 

Label
686 31.5 0 0 

1 0.0 1 1 

15 0.7 2 2 

2 0.1 3 3 

65 3.0 5 5 

53 2.4 10 10 

2 0.1 15 15 

15 0.7 20 20 

9 0.4 25 25 

9 0.4 30 30 

LTCCS Codebook TruckUnits Data Set  352 


Codebook  TruckUnits Data Set 

N 

Prcnt 

Code 

Label 

1 0.0 35 35 

3 0.1 40 40 

4 0.2 50 50 

2 0.1 60 60 

1 0.0 66 66 

1 0.0 75 75 

4 0.2 76 76 

2 0.1 80 80 

3 0.1 90 90 

3 0.1 100 100 
316 14.5 666 No tape 

25 1.1 777 Not Inspected 
862 39.6 888 Not applicable 

95 4.4 999 Unknown 

LTCCS Codebook TruckUnits Data Set  353 


Codebook  VehicleEvents Data Set 

VehicleEvents Data Set 

The VehicleEvents data set contains information about events, such as safety equipment 
deployment and fires that occurred during and immediately after the crash. One record exists for 
each vehicle. 

The VehicleEvents data set contains the variables CaseID, PSU, PSUStrat, RATWeight, and 
VehicleNumber. CaseID and VehicleNumber uniquely identify each record in this data set and 
should be used to merge the VehicleEvents data set with other vehicle level data sets. 

Format 

Type 

Length

Variable Name 

ML118F 

Numeric 

8

FireOrigin 

Definition: Identifies the location of fire initiation. 

N 

Prcnt 

Code 

Label 

5 0.2 1 Vehicle exterior (front, side, back, top) 
1 0.0 2 Exhaust System 
23 1.0 3 Fuel tank (and other fuel retention system parts) 
22 1.0 4 Engine compartment 
8 0.4 5 Cargo/Truck compartment 
4 0.2 8 Other location (specify) 
2,218 97.1 88 No fire 
3 0.1 99 Unknown 
Variable Name 

Format 

Type 

Length 

ML117F 

Numeric 

8

FireSeverity

Definition: Documents the degree of fire involvement.
N 

Prcnt 

Code 

Label 

19 0.8 1 Minor Fire 
47 2.1 2 Major Fire 
2,218 97.1 88 No fire 
Format 

Type 

Length

Variable Name 

ML202F 

Numeric 

8

RolloverType 

Definition: Describes the type of rollover event that occurred for this vehicle. Rollover is defined as 
any vehicle rotation of 90 degrees or more about any true longitudinal or lateral axis. Rollover can 
occur at any time during the collision and is coded independently of other configuration questions. 

N 

Prcnt 

Code 

Label 
1,971 86.3 0 No rollover (no overturning) 
309 13.5 1 Longitudinal axis 

1 0.0 98 Rollover, end-over-end (i.e. primarily about the lateral axis) 
3 0.1 99 Rollover (overturn), details unknown 
LTCCS Codebook VehicleEvents Data Set  354 


Codebook  VehicleEvents Data Set 

Format 

Type 

Length

Variable Name 

OT46F 

Numeric 

8

QuarterTurns 

Definition: Documents the number of quarter turns that the vehicle rolled during the crash 
sequence. A quarter turn is defined as a rotation of 90 degrees about the longitudinal axis of the 
vehicle; this does not include rotation about the vertical axis, commonly called yaw. 

N 

Prcnt 

Code 

Label 
1,971 86.3 0 0 
221 9.7 1 1 

29 1.3 2 2 
20 0.9 3 3 
15 0.7 4 4 
1 0.0 5 5 
4 0.2 6 6 
3 0.1 8 8 
1 0.0 9 9 
19 0.8 99 Unknown 
Format 

Type 

Length

Variable Name 

ML201F 

Numeric 

8

RollInitType 

Definition: Describes the type of rollover event in terms of how the rollover was inititated. The 
attributes are used for rollovers initiated about the longitudinal axis. 

N 

Prcnt 

Code 

Label 
1,971 86.3 0 No rollover 

72 3.2 1 Trip-over 
3 0.1 2 Flip-over
119 5.2 3 Turn-over (specify)
17 0.7 4 Climb-over 
26 1.1 5 Fall-over 
17 0.7 6 Bounce-over 
46 2.0 7 Collision with another vehicle 
8 0.4 8 Other rollover initiation type (specify) 
1 0.0 98 Rollover-end-over-end 
4 0.2 99 Unknown rollover initiation type 
LTCCS Codebook VehicleEvents Data Set  355 


Codebook  VehicleEvents Data Set 

Format 

Type 

Length

Variable Name 

ML198F 

Numeric 

8

RollInitLocation 

Definition: Establishes the location of the trip point or start of the vehicles roll that was identified in 
the variable Rollover Initiation Type. 

N 

Prcnt 

Code 

Label 
1,971 86.3 0 No rollover 
157 6.9 1 On roadway 

19 0.8 2 On shoulder -paved 
9 0.4 3 On shoulder -unpaved
123 5.4 4 On roadside or divided trafficway median
1 0.0 8 Rollover -end-over-end 
4 0.2 9 Unknown 
Format 

Type 

Length

Variable Name 

ML1205F 

Numeric 

8

RollObject 

Definition: Is related to the variable Rollover Initiation Type, and identifies the source of the force 
that acted upon the vehicle, which resulted in the rollover. 

N 

Prcnt 

Code 

Label 
1,971 86.3 0 No rollover 

20 0.9 1 Vehicle#1 
19 0.8 2 Vehicle#2 
4 0.2 3 Vehicle#3 
2 0.1 4 Vehicle#4 
1 0.0 5 Vehicle#5
145 6.3 31 Overturn->rollover(excludes end-over-end)
1 0.0 32 Rollover->end-over-end 
2 0.1 34 Jackknife 
1 0.0 41 Tree(<= 10 cm in diameter) 
1 0.0 42 Tree(> 10 cm in diameter) 
1 0.0 44 Embankment 
1 0.0 51 Nonbreakaway pole or post(>10 cm but <= 30 cm in diameter) 
27 1.2 54 Concrete traffic barrier 
5 0.2 56 Other traffic barrier(includes guardrail) (specify) 
1 0.0 58 Wall 
59 2.6 61 Ground 
9 0.4 63 Curb 
1 0.0 64 Bridge 
3 0.1 68 Other fixed object (specify) 
1 0.0 88 Other nonfixed object (specify) 
LTCCS Codebook VehicleEvents Data Set  356 


Codebook  VehicleEvents Data Set 

N 

Prcnt 

Code 

Label 

4 0.2 98 Other event (specify) 
5 0.2 99 Unknown event or object 
Variable Name 

Format 

Type 

Length 

ML200F 

Numeric 

8

RollTrip 

Definition: Establishes the specific point on the vehicle where the tripping force was applied. 
N 

Prcnt 

Code 

Label 
1,971 86.3 0 No rollover 

73 3.2 1 Wheels/tires 
35 1.5 2 Side plane 
32 1.4 3 End plane 
20 0.9 4 Undercarriage 
1 0.0 5 Other location on vehicle (specify)
146 6.4 6 Non-contact rollover forces (specify)
1 0.0 8 Rollover -end-over-end 
5 0.2 9 Unknown 
Format 

Type 

Length

Variable Name 

ML197F 

Numeric 

8

RollDirect 

Definition: Establishes the direction in which the vehicle initially rolled.
N 

Prcnt 

Code 

Label 

1,971 86.3 0 No rollover 
149 6.5 1 Roll right -primarily about the longitudinal axis 
157 6.9 2 Roll left -primarily about the longitudinal axis 

1 0.0 8 Rollover -end-over-end 
6 0.3 9 Unknown roll direction 
Format 

Type 

Length

Variable Name 

ML1389F 

Numeric 

8

CollisionManner 

Definition: Is intended to describe the primary impact (in terms of delta V) sustained by this vehicle 
during the collision sequence. The primary impact may not be the first impact sustained by this 
vehicle. 

N 

Prcnt 

Code 

Label
386 16.9 0 Not a collision with a motor-vehicle in transit 
724 31.7 1 Rear-end
142 6.2 2 Head-on

2 0.1 3 Rear-to-rear
805 35.2 4 Angle
LTCCS Codebook VehicleEvents Data Set  357 


Codebook  VehicleEvents Data Set 

N 

Prcnt 

Code 

Label 
130 5.7 5 Sideswipe -same direction 

36 1.6 6 Sideswipe -opposite direction 
25 1.1 8 Other (specify) 
34 1.5 9 Unknown 
Variable Name 

Format 

Type 

Length 

ML1391F 

Numeric 

8

FirstHarmfulEvent 

Definition: Establishes the first property or injury-producing event that can be determined to have 
occurred during the crash sequence. 

N 

Prcnt 

Code 

Label
136 6.0 1 Overturn

1 0.0 2 Fire/explosion 
4 0.2 5 Fell from vehicle 
2 0.1 6 Injured in vehicle 
36 1.6 7 Other non-collision 
28 1.2 8 Pedestrian 
8 0.4 9 Pedal cycle 
7 0.3 10 Railway train 
1 0.0 11 Animal 
1,820 79.7 12 Motor vehicle in transport 
26 1.1 13 Motor vehicle in transport in other roadway 
20 0.9 14 Parked motor vehicle 
19 0.8 16 Thrown or falling object 
31 1.4 18 Other object (not fixed) 
2 0.1 19 Building 
3 0.1 20 Impact attenuator/crash cushion 
6 0.3 21 Bridge pier or abutment 
6 0.3 23 Bridge rail 
36 1.6 24 Guardrail 
39 1.7 25 Concrete traffic barrier 
1 0.0 26 Other longitudinal barrier 
5 0.2 27 Highway/traffic sign post 
4 0.2 29 Luminaire/light support 
2 0.1 30 Utility pole 
5 0.2 31 Other post, pole or support 
1 0.0 32 Culvert 
5 0.2 33 Curb 
1 0.0 34 Ditch 
7 0.3 35 Embankment -earth 
1 0.0 36 Embankment -rock, stone or concrete 
2 0.1 38 Fence 
LTCCS Codebook VehicleEvents Data Set  358 


Codebook  VehicleEvents Data Set 

N 

Prcnt 

Code 

Label 

1 0.0 39 Wall 
2 0.1 41 Shrubbery 
9 0.4 42 Tree 
2 0.1 43 Other fixed object 
1 0.0 46 Traffic signal support 
4 0.2 99 Unknown 
LTCCS Codebook VehicleEvents Data Set  359 


Codebook  VehicleExterior Data Set 

VehicleExterior Data Set 

The VehicleExterior data set contains information on each passenger vehicle in the crash. Trucks 
are not included in this data set but instead are covered under TruckExterior. This material is 
provided as one record for each passenger vehicle involved in the crash. 

The VehicleExterior data set contains the variables CaseID, PSU, PSUStrat, RATWeight, and 
VehicleNumber. CaseID and VehicleNumber uniquely identify each record in this data set and 
should be used to merge the VehicleExterior data set with other vehicle level data sets. 

Format 

Type 

Length

Variable Name 

ML280F 

Numeric 

8

BodyCategory

Definition: Describes the vehicles general body category. 
N 

Prcnt 

Code 

Label
551 59.8 1 Automobiles
118 12.8 3 Utility Vehicles (<= 4,536 kgs GVWR)

98 10.6 4 Van Based Light Trucks (<= 4,536 kgs GVWR)
147 16.0 5 Light Conventional Trucks (Pickup style cab,<=4,536kgs GVWR)

7 0.8 6 Other Light Trucks (<= 4,536 kgs GVWR) 
Format 

Type 

Length

Variable Name 

ML281F 

Numeric 

8

VEXBodyType 

Definition: Documents the body type of the vehicle, as identified by the manufacturer. 

N 

Prcnt 

Code 

Label 

14 1.5 1 Convertible
110 11.9 2 2-door sedan, hardtop, coupe
35 3.8 3 3-door/2-door hatchback
366 39.7 4 4-door sedan, hardtop
10 1.1 5 5-door/4-door hatchback 
14 1.5 6 Station Wagon
98 10.6 14 Compact utility
15 1.6 15 Large utility 
5 0.5 16 Utility station wagon 
2 0.2 17 3-door coupe 
62 6.7 20 Minivan 
34 3.7 21 Large van 
2 0.2 28 Other van type 
60 6.5 30 Compact pickup 
85 9.2 31 Large pickup 
1 0.1 32 Pickup with slide-in camper 
1 0.1 39 Unknown pickup style light conventional truck type 
7 0.8 40 Cab chassis based 
LTCCS Codebook VehicleExterior Data Set  360 


Codebook  VehicleExterior Data Set 

Format 

Type 

Length

Variable Name 

ML31F 

Numeric 

8

VEXVehicleClass 

Definition: Documents the class of vehicle, as determined by the researcher. This classification 
system is based on documentation provided by the Passenger Car Classification Committee 
A3B11(1) of the Transportation Research Board, Traffic Records and Accident Analysis Committee, 
A3B11. This classification is based on the size of the vehicles wheelbase. 

N 

Prcnt 

Code 

Label
117 12.7 1 Subcompact/mini (wheelbase < 254 cm)
184 20.0 2 Compact (wheelbase >= 254 but < 265 cm)
173 18.8 3 Intermediate (wheelbase >= 265 but < 278 cm)

51 5.5 4 Full Size (wheelbase >= 278 but < 291 cm) 
26 2.8 5 Largest (wheelbase >= 291 cm)
98 10.6 14 Compact utility vehicle
15 1.6 15 Large utility vehicle ( <= 4,536 kgs GVWR) 
5 0.5 16 Utility station wagon ( <= 4,536 kgs GVWR) 
62 6.7 20 Minivan ( <= 4,536 kgs GVWR) 
34 3.7 21 Large van ( <= 4,536 kgs GVWR) 
2 0.2 28 Other van type ( <= 4,536 kgs GVWR) 
60 6.5 30 Compact pickup truck ( <= 4,536 kgs GVWR) 
85 9.2 31 Large pickup truck ( <= 4,536 kgs GVWR) 
1 0.1 38 Other pickup truck type ( <= 4,536 kgs GVWR) 
1 0.1 39 Unknown pick up truck (<=4,536 kgs GVWR) 
7 0.8 45 Other light truck ( <= 4,536 kgs GVWR) 
Variable Name 

Format 

Type 

Length 

ML282F 

Numeric 

8

VEXWeightSource 

Definition: Identifies the source from which the curb weight of the vehicle was obtained. 
N 

Prcnt 

Code 

Label 

7 0.8 0 Curb weight unknown 
26 2.8 1 AAMA
517 56.1 2 Automotive News
189 20.5 3 Branham Automobile Reference Book
133 14.4 4 Gasoline Truck, Import Truck, and Diesel Truck Index 
44 4.8 8 Other (specify) 
5 0.5 99 Unknown curb weight source 
LTCCS Codebook VehicleExterior Data Set  361 


Codebook  VehicleExterior Data Set 

Format 

Type 

Length

Variable Name 

OT29F 

Numeric 

8

VEXCargoWeight 

Definition: Documents the weight (in kilograms) of any cargo inside the vehicle at the time of the 
crash and most often represents a researchers best guess estimate of the cargo weight in 
kilograms. This value is based on interview information, the PAR, and vehicle inspection. 

N 

Prcnt 

Code 

Label
573 62.2 0 0 

5 0.5 1 1 

6 0.7 2 2 

1 0.1 3 3 

39 4.2 5 5 

9 1.0 7 7 

24 2.6 9 9 

3 0.3 10 10 

16 1.7 11 11 
------------------------------

2 0.2 680 680 

1 0.1 701 701 

2 0.2 907 907 

1 0.1 1133 1133 

4 0.4 1134 1134 

1 0.1 1361 1361 

2 0.2 1814 1814 

1 0.1 2313 2313 

1 0.1 3039 3039 

60 6.5 999999 Unknown 

Format 

Type 

Length

Variable Name 

ML283F 

Numeric 

8

VEXCargoSource 

Definition: Documents the source from which the estimate of the weight of the cargo inside the 
vehicle at the time of the crash was obtained. 

N 

Prcnt 

Code 

Label 

60 6.5 0 Cargo weight unknown
789 85.7 1 Vehicle inspection

63 6.8 2 Interview 

1 0.1 4 Tow Yard Operator 

8 0.9 8 Other (specify) 

LTCCS Codebook VehicleExterior Data Set  362 


Codebook  VehicleExterior Data Set 

Format 

Type 

Length

Variable Name 

$10 

Char 

10

VEXVIN 

Definition: Documents the Vehicle Identification Number (VIN) of the vehicle, as determined by the 
researcher from vehicle inspection. 

N 

Prcnt 

Code 

Label 

1 0.1 * 1582028838 
1 0.1 * 19UUA566X1 
1 0.1 * 1B3BA56J0K 
1 0.1 * 1B3BD36D2G 
1 0.1 * 1B3BE46D9F 
1 0.1 * 1B3BE46K8H 
1 0.1 * 1B3BX68E6H 
1 0.1 * 1B3BZ48C4G 
1 0.1 * 1B3EJ46X4X 
1 0.1 * 1B3EJ46X5S 
------------------------------
1 0.1 * WVWCA0156G 
1 0.1 * WVWRB11G3K 
1 0.1 * YS3CN65M6R 
1 0.1 * YS3DD58B3V 
1 0.1 * YV1AX8842G 
1 0.1 * YV1FX8845K 
1 0.1 * YV1GA8746L 
1 0.1 * YV1LS5574W 
1 0.1 * YV1LS5826V 
1 0.1 * YV1LZ5648W 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Format 

Type 

Length

Variable Name 

ML1326F 

Numeric 

8

VEXSpecialUse 

Definition: Documents specific other uses for the vehicle in addition to personal use. 

N 

Prcnt 

Code 

Label
908 98.6 0 No Special Use

4 0.4 1 Taxi 
1 0.1 2 Vehicle used as a school bus 
5 0.5 5 Police 
2 0.2 6 Ambulance 
1 0.1 9 Unknown 
LTCCS Codebook VehicleExterior Data Set  363 


Codebook  VehicleExterior Data Set 

Format 

Type 

LengthVariable Name 

ML536F 

Numeric 

8 

Definition: Determines whether or not the vehicle was in transport at the time of the crash. To be 
considered in transport, a vehicle must be on the roadway or in motion within the trafficway. 

InTransport 

N Prcnt Code Label 
4 0.4 0 No 
917 99.6 1 Yes 

Variable Name 

Format 

Type 

Length 

ML177F 

Numeric 

8

InspectionType 

Definition: Documents the type of inspection performed on the vehicle by the researcher. It allows 
users to identify cases with complete documentation of required damage data (exterior and interior). 

N 

Prcnt 

Code 

Label 

2 0.2 1 Vehicle fully repaired -no damage evident
373 40.5 2 Partial inspection (specify)
546 59.3 3 Complete Inspection 
Variable Name 

Format 

Type 

Length 

$7 

Char 

7

VEXInspectionDate 

Definition: Documents the date that the researcher inspected the vehicle. 
N 

Prcnt 

Code 

Label 

22 2.4 * 2001-01 
10 1.1 * 2001-02 
23 2.5 * 2001-03 
26 2.8 * 2001-04 
25 2.7 * 2001-05 
28 3.0 * 2001-06 
24 2.6 * 2001-07 
23 2.5 * 2001-08 
16 1.7 * 2001-09 
34 3.7 * 2001-10 
26 2.8 * 2001-11 
16 1.7 * 2001-12 
31 3.4 * 2002-01 
29 3.1 * 2002-02 
44 4.8 * 2002-03 
32 3.5 * 2002-04 
31 3.4 * 2002-05 
26 2.8 * 2002-06 
17 1.8 * 2002-07 
LTCCS Codebook VehicleExterior Data Set  364 


Codebook  VehicleExterior Data Set 

N 

Prcnt 

Code 

Label 

27 2.9 * 2002-08 

27 2.9 * 2002-09 

26 2.8 * 2002-10 

43 4.7 * 2002-11 

20 2.2 * 2002-12 

27 2.9 * 2003-01 

29 3.1 * 2003-02 

37 4.0 * 2003-03 

28 3.0 * 2003-04 

22 2.4 * 2003-05 

37 4.0 * 2003-06 

21 2.3 * 2003-07 

17 1.8 * 2003-08 

10 1.1 * 2003-09 

25 2.7 * 2003-10 

22 2.4 * 2003-11 

18 2.0 * 2003-12 

2 0.2 * 2004-01 

Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Format 

Type 

Length

Variable Name 

ML247F 

Numeric 

8

Transmission 

Definition: Documents the type of transmission that is in the vehicle. 
N 

Prcnt 

Code 

Label
131 14.2 1 Manual
746 81.0 2 Automatic

44 4.8 9 Unknown 

Variable Name 

Format 

Type 

Length 

ML113F 

Numeric 

8

DriveWheels 

Definition: Describes the type of drive wheels that power the vehicle. 
N 

Prcnt 

Code 

Label
499 54.2 1 Front Wheel Drive (FWD)
266 28.9 2 Rear Wheel Drive (RWD)
123 13.4 3 Four Wheel Drive (4WD)

9 1.0 4 All Wheel Drive (AWD) 

24 2.6 9 Unknown 

LTCCS Codebook VehicleExterior Data Set  365 


Codebook  VehicleExterior Data Set 

Format 

Type 

Length

Variable Name 

ML484F 

Numeric 

8

LFRestricted 

Definition: Documents whether or not the vehicles left front tire was prevented from rotation by 
damaged components of this vehicle as a result of the crash. 

N 

Prcnt 

Code 

Label
270 29.3 1 Yes
618 67.1 2 No

2 0.2 3 Not-Applicable 
31 3.4 4 Unknown 
Format 

Type 

Length

Variable Name 

ML484F 

Numeric 

8

LRRestricted 

Definition: Documents whether or not the vehicles left rear tire was prevented from rotation by 
damaged components of this vehicle as a result of the crash. 

N 

Prcnt 

Code 

Label
120 13.0 1 Yes
767 83.3 2 No

2 0.2 3 Not-Applicable 
32 3.5 4 Unknown 
Variable Name 

Format 

Type 

Length 

ML484F 

Numeric 

8

RRRestricted 

Definition: Documents whether or not the vehicles right rear tire was prevented from rotation by 
damaged components of this vehicle as a result of the crash. 

N 

Prcnt 

Code 

Label
112 12.2 1 Yes
776 84.3 2 No

3 0.3 3 Not-Applicable 
30 3.3 4 Unknown 
Variable Name 

Format 

Type 

Length 

ML484F 

Numeric 

8

RFRestricted 

Definition: Documents whether or not the vehicles right front tire was prevented from rotation by 
damaged components of this vehicle as a result of the crash. 

N 

Prcnt 

Code 

Label
251 27.3 1 Yes
641 69.6 2 No

29 3.1 4 Unknown 
LTCCS Codebook VehicleExterior Data Set  366 


Codebook  VehicleExterior Data Set 

Format 

Type 

Length

Variable Name 

ML484F 

Numeric 

8

LFDeflated 

Definition: Documents whether or not the vehicles left front tire was deflated as a result of the 
crash. 

N 

Prcnt 

Code 

Label
270 29.3 1 Yes
618 67.1 2 No

2 0.2 3 Not-Applicable 
31 3.4 4 Unknown 
Variable Name 

Format 

Type 

Length 

ML484F 

Numeric 

8

LRDeflated 

Definition: Documents whether or not the vehicles left rear tire was deflated as a result of the 
crash. 

N 

Prcnt 

Code 

Label
120 13.0 1 Yes
767 83.3 2 No

2 0.2 3 Not-Applicable 
32 3.5 4 Unknown 
Variable Name 

Format 

Type 

Length 

ML484F 

Numeric 

8

RRDeflated 

Definition: Documents whether or not the vehicles right rear tire was deflated as a result of the 
crash. 

N 

Prcnt 

Code 

Label
112 12.2 1 Yes
776 84.3 2 No

3 0.3 3 Not-Applicable 
30 3.3 4 Unknown 
Variable Name 

Format 

Type 

Length 

ML484F 

Numeric 

8

RFDeflated 

Definition: Documents whether or not the vehicles right front tire was deflated as a result of the 
crash. 

N 

Prcnt 

Code 

Label
251 27.3 1 Yes
641 69.6 2 No

29 3.1 4 Unknown 
LTCCS Codebook VehicleExterior Data Set  367 


Codebook  VehicleExterior Data Set 

Variable Name 

Format 

Type 

Length 

OT25F 

Numeric 

8

Wheelbase 

Definition: Reflects the length (in centimeters) of the vehicles original or undamaged wheelbase to 
the nearest centimeter, based on manufacturer specifications. 

N 

Prcnt 

Code 

Label 

1 0.1 203 203 

3 0.3 220 220 

1 0.1 224 224 

1 0.1 225 225 

2 0.2 227 227 

1 0.1 236 236 

5 0.5 237 237 

3 0.3 238 238 

6 0.7 239 239 

6 0.7 240 240 
-------------------------------

2 0.2 395 395 

1 0.1 396 396 

4 0.4 400 400 

1 0.1 401 401 

1 0.1 405 405 

1 0.1 408 408 

1 0.1 411 411 

1 0.1 424 424 

2 0.2 428 428 

9 1.0 999 Unknown 

Format 

Type 

Length

Variable Name 

OT28F 

Numeric 

8

OverallLength 

Definition: Documents the overall length (in centimeters) of the vehicle, as specified by the 
manufacturer. 

N 

Prcnt 

Code 

Label 

1 0.1 222 222 

1 0.1 343 343 

1 0.1 357 357 

2 0.2 362 362 

1 0.1 367 367 

1 0.1 375 375 

1 0.1 379 379 

3 0.3 384 384 

LTCCS Codebook VehicleExterior Data Set  368 


Codebook  VehicleExterior Data Set 

N 

Prcnt 

Code 

Label 

1 0.1 395 395 

1 0.1 396 396 
-------------------------------

1 0.1 614 614 

1 0.1 618 618 

2 0.2 620 620 

1 0.1 621 621 

2 0.2 624 624 

2 0.2 626 626 

2 0.2 627 627 

1 0.1 651 651 

1 0.1 674 674 

9 1.0 9999 Unknown 

Variable Name 

Format 

Type 

Length 

OT25F 

Numeric 

8

MaxWidth 

Definition: Documents the overall/maximum width (in centimeters) of the vehicle, as specified by 
the manufacturer. 

N 

Prcnt 

Code 

Label 

2 0.2 141 141 

3 0.3 153 153 

1 0.1 158 158 

3 0.3 159 159 

1 0.1 160 160 

1 0.1 161 161 

3 0.3 162 162 

7 0.8 163 163 

7 0.8 164 164 

9 1.0 165 165 
------------------------------

38 4.1 202 202 

10 1.1 203 203 

1 0.1 217 217 

1 0.1 219 219 

1 0.1 236 236 

1 0.1 238 238 

1 0.1 242 242 

1 0.1 244 244 

1 0.1 246 246 

8 0.9 999 Unknown 

LTCCS Codebook VehicleExterior Data Set  369 


Codebook  VehicleExterior Data Set 

Format 

Type 

Length

Variable Name 

OT29F 

Numeric 

8

VEXCurbWeight 

Definition: Documents the vehicles curb weight (in kilograms), as identified by manufacturer 
specifications. 

N 

Prcnt 

Code 

Label 

1 0.1 696 696 

1 0.1 710 710 

1 0.1 820 820 

1 0.1 831 831 

2 0.2 885 885 

1 0.1 890 890 

1 0.1 893 893 

1 0.1 912 912 

1 0.1 921 921 

1 0.1 925 925 
------------------------------

1 0.1 2697 2697 

1 0.1 2738 2738 

1 0.1 2753 2753 

1 0.1 2759 2759 

1 0.1 2777 2777 

1 0.1 2839 2839 

1 0.1 2847 2847 

1 0.1 3118 3118 

1 0.1 3259 3259 

7 0.8 999999 Unknown 

Format 

Type 

Length

Variable Name 

OT25F 

Numeric 

8

AverageTrack 

Definition: Documents the vehicles average track width in centimeters, calculated by averaging the 
front and rear track width, values that are identified by the manufacturer. This value represents the 
average track width prior to the crash (undamaged). 

N 

Prcnt 

Code 

Label 

1 0.1 101 101 

1 0.1 102 102 

1 0.1 129 129 

1 0.1 130 130 

3 0.3 134 134 

1 0.1 135 135 

2 0.2 137 137 

5 0.5 138 138 

LTCCS Codebook VehicleExterior Data Set  370 


Codebook  VehicleExterior Data Set 

N 

Prcnt 

Code 

Label 

12 1.3 139 139 

6 0.7 171 171 
------------------------------

3 0.3 172 172 

10 1.1 173 173 

8 0.9 174 174 

2 0.2 175 175 

1 0.1 176 176 

1 0.1 177 177 

3 0.3 178 178 

1 0.1 180 180 

88 9.6 999 Unknown 

Variable Name 

Format 

Type 

Length 

OT25F 

Numeric 

8

FrontOverhang 

Definition: Documents the front overhang in centimeters of the vehicle as identified by 
manufacturer specifications. Front overhang is the distance between the front axle and the maximum 
forward projection of the vehicle. This value represents the vehicles front overhang prior to the crash 
(undamaged). 

N 

Prcnt 

Code 

Label 

1 0.1 58 58 

1 0.1 61 61 

4 0.4 62 62 

1 0.1 64 64 

4 0.4 65 65 

1 0.1 67 67 

3 0.3 68 68 

11 1.2 70 70 

4 0.4 71 71 

4 0.4 72 72 
------------------------------

10 1.1 115 115 

5 0.5 116 116 

4 0.4 117 117 

7 0.8 118 118 

3 0.3 119 119 

1 0.1 121 121 

2 0.2 122 122 

1 0.1 125 125 

1 0.1 126 126 

LTCCS Codebook VehicleExterior Data Set  371 


Codebook  VehicleExterior Data Set 

N 

Prcnt 

Code 

Label 

2 0.2 141 141 

43 4.7 999 Unknown 

Variable Name 

Format 

Type 

Length 

OT25F 

Numeric 

8

RearOverhang 

Definition: Documents the rear overhang in centimeters of the vehicle as identified by manufacturer 
specifications. Rear overhang is the distance between the rear axle and the maximum rear projection 
of the vehicle. This value represents the rear overhang prior to the crash (undamaged). 

N 

Prcnt 

Code 

Label 

1 0.1 62 62 

1 0.1 64 64 

1 0.1 65 65 

2 0.2 67 67 

1 0.1 69 69 

1 0.1 71 71 

4 0.4 72 72 

4 0.4 74 74 

3 0.3 75 75 

3 0.3 76 76 
------------------------------

3 0.3 145 145 

1 0.1 153 153 

1 0.1 154 154 

1 0.1 160 160 

1 0.1 161 161 

4 0.4 162 162 

1 0.1 179 179 

1 0.1 188 188 

1 0.1 200 200 

48 5.2 999 Unknown 

Variable Name 

Format 

Type 

Length 

OT25F 

Numeric 

8

EndWidth 

Definition: Represents the undamaged dimension in centimeters of either the contacted end plane 
or the front undamaged plane if the side plane is contacted. 

N 

Prcnt 

Code 

Label 

1 0.1 118 118 

1 0.1 124 124 

1 0.1 128 128 

3 0.3 130 130 

LTCCS Codebook VehicleExterior Data Set  372 


Codebook  VehicleExterior Data Set 

N 

Prcnt 

Code 

Label 

2 0.2 132 132 
1 0.1 133 133 
2 0.2 135 135 
4 0.4 136 136 
2 0.2 137 137 
10 1.1 138 138 
------------------------------
6 0.7 190 190 
2 0.2 191 191 
2 0.2 192 192 
1 0.1 193 193 
2 0.2 194 194 
6 0.7 195 195 
5 0.5 196 196 
2 0.2 200 200 
3 0.3 202 202 
1 0.1 214 214
211 22.9 999 Unknown 
Format 

Type 

Length

Variable Name 

ML1201F 

Numeric 

8

VehicleDisposition 

Definition: Represents the researchers assessment of the disposition of the vehicle and is based 
primarily on inspection of the vehicle. 

N 

Prcnt 

Code 

Label
130 14.1 0 Not towed due to vehicle damage
784 85.1 1 Towed due to vehicle damage

7 0.8 9 Unknown 
Variable Name 

Format 

Type 

Length 

$30 

Char 

30

Justification 

Definition: Represents the reason for the determination that the vehicle was or was not towed, 
based on the researchers assessment of the disposition of the vehicle. 

N 

Prcnt 

Code 

Label 

1 0.1 * 4 flat tires, passenger compar 
1 0.1 * AXEL DAMAGE 
1 0.1 * AXLES DAMAGED AND ENGINE DAMAG 
1 0.1 * Air bags deployed. 
1 0.1 * Appeared driveable 
1 0.1 * BENT FRAME 
LTCCS Codebook VehicleExterior Data Set  373 


Codebook  VehicleExterior Data Set 

N 

Prcnt 

Code 

Label 

1 0.1 * BENT FRAME RAIL 
1 0.1 * BOTH FRONT TIRES RESTRICTED 
1 0.1 * BOTH FRONT WHEELS RESTRICTED 
1 0.1 * BOTH REAR WHEELS DISABLED 
------------------------------
1 0.1 * vehicle entirely destroyed by 
60 6.5 * vehicle inspection 
1 0.1 * vehicle inspection LF restrict 
1 0.1 * vehicle is driveable 
1 0.1 * vehicle repaired 
1 0.1 * vehilce inspection 
1 0.1 * wheel and tire damage 
7 0.8 * wheel damage 
1 0.1 * wheel damage both left side 
4 0.4 * wheel restriction 
Note: Asterisk in code column indicates that the stored value is the same as the value in the label column. 

Variable Name 

Format 

Type 

Length 

ML115F 

Numeric 

8

MultiStage 

Definition: Documents whether the vehicle is a multi-stage (initially an incomplete) vehicle or an 
altered (modified) vehicle. The determination is based on a label attached to the vehicle that 
demonstrates compliance with all Federal Motor Vehicle Safety Standards. 

N Prcnt Code Label 
889 96.5 0 No post-manufacturer modifications 
21 2.3 1 Yes -post-manufacturer modification (specify) 
11 1.2 9 Unknown if vehicle is modified 

LTCCS Codebook VehicleExterior Data Set  374 


Generalized Estimated Sampling Errors 

The tables on the following pages can be used to estimate standard errors and confidence intervals for estimated totals of variables contained in the LTCCS data sets. Recently, statistical software has become more widely available that allows standard errors and confidence intervals to be estimated directly for samples that include stratification and clustering. The following tables are provided for researchers who may not have access to such software. The tables were derived based on the method of generalized variance functions (GVF).  Nine separate tables are provided that can be used according to the level at which the data were analyzed. Tables are provided for each of the nine levels of analysis:
	Brake		Occupant
	Crash		Passenger
	Driver		Truck
	Drug		Vehicle
	Injury	

For example, if the data were analyzed at the truck level, then estimated standard errors from the truck table can be applied. If the data were analyzed at the occupant level, then estimated standard errors from the occupant table can be applied. The tables provide estimated standard errors for a range of estimated totals that might be derived from the data; however, there is no need to interpolate if an estimated total falls in between two numbers in a given table. The generalized variance functions that appear below each table can be used to generate the estimated standard errors. The equations appear in the form 
 
where x is the estimated total and a and b are constants. Substitution of x, a, and b directly into the equation gives the estimated standard error. Approximate two-sided confidence intervals for estimated totals can be calculated by using the formula
   
where x is the estimated total, t is the upper percentage point of the t-distribution on 12 degrees of freedom for a two-sided confidence interval, and se(x) is the estimated standard error.
As an example, suppose the number of occupants wearing a lap and shoulder belt is estimated at 180,000 and a 95% confidence interval is desired. The approximate standard error for this estimate is 29,600, as shown by the entry to the right of 180,000 in the occupant table. The value for t is 2.18 which corresponds to the upper percentage point of the t-distribution on 12 degrees of freedom for a 95% two-sided confidence interval (the degrees of freedom equals the number of PSUs minus the number of strata, which in the case of the LTCCS design is 24-12=12). Therefore, the estimated 95% confidence interval is 
 
or (115,472, 244,528). If the estimated total is 182,000, which does not appear in the table, the formula can be applied directly to calculate the estimated standard error, leading to 
 
rounded to the nearest 100.

LTCCS Codebook Generalized Estimated Sampling Errors  375 


LTCCS ESTIMATES AND STANDARD ERRORS 
Brake Crash Drug 
Estimate (x) 
Standard Error 
(se) Estimate (x) 
Standard Error 
(se) Estimate (x) 
Standard Error 
(se) 
100 100 100 100 100 100 
200 100 200 200 200 200 
500 300 500 300 500 300 
1,000 500 1,000 600 1,000 600 
2,500 1,100 2,000 1,000 2,000 1,100 
5,000 2,000 3,000 1,300 3,000 1,500 
7,500 2,900 4,000 1,700 4,000 2,000 
10,000 3,600 5,000 2,000 5,000 2,400 
12,500 4,400 6,000 2,300 6,000 2,800 
15,000 5,100 7,000 2,600 7,000 3,200 
17,500 5,800 8,000 2,900 8,000 3,600 
20,000 6,400 9,000 3,200 9,000 4,000 
25,000 7,800 10,000 3,500 10,000 4,300 
30,000 9,000 12,500 4,200 12,500 5,300 
35,000 10,300 15,000 4,800 15,000 6,200 
40,000 11,500 17,500 5,500 17,500 7,000 
45,000 12,600 20,000 6,100 20,000 7,900 
50,000 13,800 25,000 7,300 25,000 9,500 
60,000 16,000 30,000 8,400 30,000 11,100 
70,000 18,200 35,000 9,600 35,000 12,700 
80,000 20,300 40,000 10,600 40,000 14,300 
90,000 22,400 45,000 11,700 45,000 15,800 
100,000 24,500 50,000 12,700 50,000 17,300 
125,000 29,500 55,000 13,700 55,000 18,800 
150,000 34,300 60,000 14,700 60,000 20,200 
175,000 38,900 65,000 15,700 70,000 23,100 
200,000 43,500 70,000 16,600 80,000 25,900 
225,000 48,000 75,000 17,600 90,000 28,600 
250,000 52,300 80,000 18,500 100,000 31,300 
275,000 56,600 85,000 19,400 110,000 34,000 
300,000 60,900 90,000 20,300 120,000 36,600 
350,000 69,200 95,000 21,200 130,000 39,200 
400,000 77,300 100,000 22,100 140,000 41,800 
450,000 85,200 110,000 23,900 150,000 44,300 
500,000 93,000 115,000 24,800 160,000 46,900 
550,000 100,600 120,000 25,600 170,000 49,400 
SE=exp(a + b(ln x)), where 
a=0.5592 and b=0.8292 
SE=exp(a + b(ln x)), where 
a=0.7857 and b=0.8008 
SE=exp(a + b(ln x)), where 
a=0.4769 and b=0.8577 

LTCCS Codebook Generalized Estimated Sampling Errors  376 


LTCCS ESTIMATES AND STANDARD ERRORS 
Injury Occupant Passenger Vehicle 
Estimate (x) 
Standard Error 
(se) Estimate (x) 
Standard Error 
(se) Estimate (x) 
Standard Error 
(se) 
100 100 500 300 400 200 
200 100 750 400 600 300 
500 300 1,000 500 800 400 
1,000 500 2,000 800 1,000 500 
2,500 1,100 3,000 1,100 1,500 600 
5,000 1,900 4,000 1,400 2,000 800 
7,500 2,600 5,000 1,700 2,500 1,000 
10,000 3,300 6,000 2,000 3,000 1,100 
12,500 3,900 7,000 2,200 3,500 1,200 
15,000 4,600 8,000 2,500 4,000 1,400 
17,500 5,200 9,000 2,700 4,500 1,500 
20,000 5,800 10,000 3,000 5,000 1,600 
25,000 6,900 20,000 5,100 5,500 1,800 
30,000 8,000 30,000 7,100 6,000 1,900 
35,000 9,100 40,000 8,900 6,500 2,000 
40,000 10,200 50,000 10,700 7,000 2,100 
45,000 11,200 60,000 12,300 7,500 2,200 
50,000 12,200 70,000 14,000 8,000 2,300 
55,000 13,200 80,000 15,500 9,000 2,600 
60,000 14,200 90,000 17,100 10,000 2,800 
70,000 16,100 100,000 18,600 15,000 3,800 
80,000 17,900 110,000 20,000 20,000 4,700 
90,000 19,700 120,000 21,500 25,000 5,600 
100,000 21,500 130,000 22,900 30,000 6,500 
125,000 25,800 140,000 24,300 35,000 7,300 
150,000 29,900 150,000 25,600 40,000 8,100 
175,000 34,000 160,000 27,000 45,000 8,900 
200,000 37,900 170,000 28,300 50,000 9,600 
225,000 41,700 180,000 29,600 55,000 10,300 
250,000 45,400 190,000 30,900 60,000 11,100 
275,000 49,100 200,000 32,200 65,000 11,800 
300,000 52,700 220,000 34,800 70,000 12,500 
325,000 56,300 240,000 37,300 75,000 13,100 
350,000 59,800 260,000 39,700 80,000 13,800 
375,000 63,300 280,000 42,200 85,000 14,500 
400,000 66,700 300,000 44,500 90,000 15,100 
SE=exp(a + b(ln x)), where 
a=0.5629 and b=0.8175 
SE=exp(a + b(ln x)), where 
a=0.6521 and b=0.7971 
SE=exp(a + b(ln x)), where 
a=0.8450 and b=0.7695 

LTCCS Codebook Generalized Estimated Sampling Errors  377 


LTCCS ESTIMATES AND STANDARD ERRORS 
Truck Vehicle Driver 
Estimate (x) 
Standard Error 
(se) Estimate (x) 
Standard Error 
(se) Estimate (x) 
Standard Error 
(se) 
1,000 500 2,000 900 2,000 900 
2,000 900 3,000 1,200 3,000 1,200 
3,000 1,200 4,000 1,500 4,000 1,500 
4,000 1,500 5,000 1,800 5,000 1,800 
5,000 1,800 6,000 2,100 6,000 2,100 
6,000 2,100 7,000 2,300 7,000 2,300 
7,000 2,400 8,000 2,600 8,000 2,600 
8,000 2,600 9,000 2,800 9,000 2,900 
9,000 2,900 10,000 3,100 10,000 3,100 
10,000 3,200 15,000 4,200 15,000 4,300 
12,500 3,800 20,000 5,300 20,000 5,500 
15,000 4,300 25,000 6,400 25,000 6,500 
17,500 4,900 30,000 7,400 30,000 7,600 
20,000 5,400 35,000 8,300 35,000 8,600 
25,000 6,500 40,000 9,200 40,000 9,500 
30,000 7,500 45,000 10,200 45,000 10,500 
35,000 8,500 50,000 11,000 50,000 11,400 
40,000 9,400 60,000 12,800 60,000 13,200 
45,000 10,300 70,000 14,400 70,000 15,000 
50,000 11,200 80,000 16,000 80,000 16,700 
55,000 12,100 90,000 17,600 90,000 18,300 
60,000 13,000 100,000 19,100 100,000 19,900 
65,000 13,800 110,000 20,600 110,000 21,500 
70,000 14,600 120,000 22,100 120,000 23,100 
75,000 15,400 130,000 23,600 130,000 24,600 
80,000 16,300 140,000 25,000 140,000 26,100 
85,000 17,000 150,000 26,400 150,000 27,600 
90,000 17,800 160,000 27,800 160,000 29,100 
95,000 18,600 170,000 29,200 170,000 30,500 
100,000 19,400 180,000 30,500 180,000 32,000 
105,000 20,100 190,000 31,800 190,000 33,400 
110,000 20,900 200,000 33,200 200,000 34,800 
115,000 21,600 210,000 34,500 210,000 36,200 
120,000 22,400 220,000 35,800 220,000 37,600 
130,000 23,800 230,000 37,100 230,000 38,900 
140,000 25,300 240,000 38,300 240,000 40,300 
SE=exp(a + b(ln x)), where 
a=0.7911 and b=0.7888 
SE=exp(a + b(ln x)), where 
a=0.7224 and b=0.7936 
SE=exp(a + b(ln x)), where 
a=0.6410 and b=0.8042 

LTCCS Codebook Generalized Estimated Sampling Errors  378 


Index 
A 

AASHTODistance, 135 
AASHTORecommended, 153 
ABGTest, 254 
ABSFunctional, 13 
ABSInstalled, 13 
AccessControl, 128 
AccidentCat, 56 
AccidentSEA, 321 
ACDcode, 62 
ACDdetail, 63 
ACRAvoidance, 53 
ACRCargoshift, 57 
ACRCriticalEvent, 49 
ACRJackknife, 57 
ACRLocation, 54 
ACRReason, 51 
ACRRightOfWay, 54 
ACRStability, 53 
ACSAccelerating, 21 
ACSAvoidance, 21 
ACSConstant, 20 
ACSCurve, 20 
ACSDecelerating, 21 
ACSHeavyBraking, 22 
ACSLightBraking, 20 
ACSLocation, 18 
ACSModerateBraking, 22 
ACSSpillage, 19 
ACSStraight, 22 
ACSTurn, 20 
ACSType, 18 
Action, 225 
ADAOtherFactor, 87 
ADAPostedSpeed, 86 
ADATravelSpeed, 85 
ADDAdjustingRadio, 108 
ADDDialingPhone, 108 
ADDPreviousCrash, 110 
ADDRecognition, 107 
ADDSurveillance, 106 
ADHCorrectedVision, 96 
AdjustorType, 13 
ADRDrugTest, 72 
ADROtherFactor, 69 
ADRTrafficFlow, 78 
ADRWorkSchedule, 68 
ADSAverageDay, 122 
ADSHoursOnDuty, 117 
ADSLongestDay, 121 
ADSShortestDay, 122 
AFTCurveRadius, 152 
AFTFog, 160 
AFTHail, 161 
AFTNoDriver, 163 
AFTRain, 160 

AFTSleet, 161 
AFTSnow, 160 
Aggression, 269 
AggressionCount, 90 
AggressionReason, 93 
AirbagAvail, 234 
AirbagAvailable, 242 
AirbagDamage, 9 
AirbagFailure, 8 
AirbagLocation, 6 
AirbagNumber, 5 
AirbagStatus, 7 
AirbagType, 7 
AISCode, 202 
AJKAccelerating, 212 
AJKAvoidance, 212 
AJKConstant, 211 
AJKCurve, 211 
AJKDecelerating, 212 
AJKDirection, 210 
AJKHeavyBraking, 213 
AJKLightBraking, 211 
AJKLocation, 210 
AJKModerateBraking, 213 
AJKOther, 212 
AJKSource, 209 
AJKStraight, 213 
AJKTurn, 211 
AJKType, 209 
AlcoholTest, 70 
AlcoholUse, 70 
AnchorAdjustment, 243 
ANL, 291 
ANMAge, 221 
ANMAvoidance, 228 
ANMDecision, 227 
ANMGender, 224 
ANMHeight, 222 
ANMPARSevCode, 228 
ANMPosition, 224 
ANMRESSevCode, 229 
ANMType, 224 
ANMWeight, 223 
AnyDrugsCrash, 48 
AnyDrugsVeh, 267 
Approach, 85 
ApproachingTraffic, 110 
Aspect, 202 
Assumption, 87 
Astigmatic, 100 
AuthorizedForHire, 276 
AutoBeltAvailable, 245 
AutoBeltFailure, 246 
AutoBeltProper, 246 
AutoBeltSource, 246 
AutoBeltUsed, 245 
AverageTrack, 370 
Axle, 12 

LTCCS Codebook Index  379 


AxlesNotUsed, 349 
AxlesUsed, 348 

B 

BadLaneMarkings, 155 
BaffleFailure, 24 
BaseWeight, 183 
BeltMotorized, 246 
BIK, 291 
BIPDOK, 314 
BIPDRequired, 314 
BlindSpot, 327 
BlockingOthers, 93 
BlowingDebris, 162 
BodyCategory, 360 
BondOK, 315 
BondRequired, 315 
BrakeFailure, 147 
BrakesInoperative, 149 
BrakesOutOfAdjustment, 149 
BrakesSystemDeficiency, 150 
BrakeType, 12 
BRAPosition, 13 
BrokerStatus, 275 
Building, 111 

C 

CabStyle, 326 
CapacityPercent, 345 
Carburetion, 181 
CarCount, 42 
CargoCarried, 279 
CargoLoadSecurement, 150 
CargoOK, 315 
CargoRequired, 314 
CargoType, 340 
CarrierEmployer, 269 
CarrierOperationDescription, 280 
CategoryDescription, 325 
CauseCount, 19 
CDC, 11 
CDCCategory, 38 
CDCObjectContact, 28 
CDCWidth, 38 
CGO, 291 
ChamberSize, 14 
ChamberType, 15 
ChildSeatAvailable, 241 
CitDate, 61 
ClassVehicle, 139 
ClassVehicle2, 142 
ClockForce, 30 
CMDBCargoWeight, 330 
CMVCrashes, 190 
CMVViolations, 190 
Code, 219 
ColdFlu, 98 
CollisionManner, 357 
CollisionType, 45 
ColorBlind, 100 

ComfortCount, 77 
CommonStatus, 275 
CompartmentFailure, 24 
Component, 207 
ConstructionZone, 144 
ContactOther, 11 
ContractStatus, 275 
ConvDate, 62 
Conversant, 105 
Conversation, 104 
CountDrivers, 280 
CountPowerUnits, 281 
CRAAlcohol, 48 
CrashCode, 54 
CrashDate, 40 
Crashes, 214 
CrashPARSevCode, 43 
CrashRESSevCode, 44 
CrashTime, 41 
CrashType, 43 
CriticalEventCat, 51 
CrossedLine, 88 
CrushDirection, 206 
CrushMagnitude, 206 

D 

DamageArea, 140 
DamageArea2, 143 
DamageLocation, 36 
DamageSource, 10 
DataRecorder, 327 
DateOfDeath, 250 
Day, 45 
Daylight, 129 
DayRunningLights, 183 
DCType, 27 
DeformCode, 35 
DeformDistribution, 34 
DeformExtent, 34 
DeformLocation, 32 
DeformLong, 32 
DeformVertical, 33 
Demoted, 76 
Deployment, 7 
Depowered, 7 
DesignDefect, 132 
DesignedObstructedView, 147 
DiabeticBlackout, 97 
Discussion, 58 
Distraction, 227 
DriverFatigue, 268 
DriverInspections, 305 
DriverNumber, 64 
DriverOutOfService, 306 
DriverOutOfServicePerc, 306 
DriverPhysical, 268 
DriverPresent, 186 
DriverReported, 95 
DriverSEA, 322 
DriverViolationsAverage, 307 
DriveWheels, 365 

LTCCS Codebook Index  380 


DromedaryBox, 326 
DrugName, 94 
DrugType, 94 

E 

EjectionArea, 235 
EjectionType, 234 
EmergencyVehicle, 145 
Emotional, 74 
EmotionExperience, 269 
EndWidth, 372 
EngineProblem, 148 
Entrapment, 236 
ENVDust, 137 
ENVFog, 136 
ENVHail, 136 
EnvironmentCount, 162 
ENVNoConditions, 135 
ENVOtherConditions, 137 
ENVRain, 135 
ENVSleet, 137 
ENVSnow, 136 
ENVTrafficFlow, 126 
ENVWindGusts, 136 
EpilepticSeizure, 97 
EQF, 292 
EthnicOrigin, 189 
Evasion, 87 
EventNumber, 26 
EventSequence, 138 
EVEObjectContact, 141 
ExemptForHire, 276 
ExhaustLeak, 152 
EXPWorkSchedule, 76 
ExteriorDistractionCount, 110 
ExternalPerson, 111 
ExtraLoads, 76 
EyeWear, 233 

F 

FamilyProblems, 68 
Fatigue, 73 
FederalGovernment, 277 
FieldLocation, 36 
FillInTrips, 82 
FIR, 292 
FireOrigin, 354 
FireSeverity, 354 
FirstHarmfulEvent, 358 
FlapsDamaged, 9 
FlapsOpen, 9 
Flashing, 92 
FloorRetrieval, 109 
FlowRestriction, 126 
FOB, 292 
Focused, 67 
ForceDirection, 29 
FourWheelDrive, 180 
FrontOverhang, 371 
FrontWheelDrive, 180 

FuelSystemProblem, 151 
FuelType, 182 
FunctionalClass, 128 
Functioning, 130 

G 

GCSScore, 253 
GearPosition, 328 
Glare, 162 
Glaucoma, 99 
GVEBodyType, 167 
GVECargoSource, 171 
GVECargoWeight, 170 
GVECurbWeight, 169 
GVEInspection, 172 
GVEInspectionDate, 172 
GVEMake, 164 
GVEModel, 165 
GVEMotorcycleDisplacement, 184 
GVEPARSevCode, 173 
GVEPostedSpeed, 185 
GVERESSevCode, 174 
GVERestraintType, 181 
GVESpecialUse, 172 
GVETotalViolations, 192 
GVETravelSpeed, 184 
GVEVehicleClass, 168 
GVEVIN, 171 
GVEWeightSource, 169 
GVEYear, 166 
GVWR, 344 

H 

HandsUsed, 228 
Hazard, 348 
HazardousMaterial, 291 
HazmatInspections, 310 
HazmatOutOfService, 311 
HazmatOutOfServicePerc, 312 
HazmatViolationsAverage, 313 
HearingImpaired, 226 
HearingImpairment, 101 
HearingRestricted, 226 
HeartAttack, 97 
HMIDisposition, 199 
HMIInspection, 198 
HMIOutOfService, 199 
HMIViolation, 199 
Honking, 92 
HospitalDays, 248 
HoursDriving, 117 
HoursSinceSleep, 114 
HoursWorked, 120 
Hurrying, 73 
Hyperopic, 99 

I 

IllegalUTurn, 89 

LTCCS Codebook Index  381 


Illness, 69 
IllnessFactorCount, 96 
ImpactNumber, 35 
ImproperBulkLoading, 23 
ImproperGeneralLoading, 23 
Inattention, 104 
IndianTribe, 278 
InformationSource, 207 
InitialFacility, 248 
InitialTreatment, 247 
InjuryCount, 252 
InjuryNumber, 200 
InjurySource, 203 
InjurySourceCat, 203 
InspDriverOOS, 215 
InspectionExists, 198 
Inspections, 214 
InspectionType, 364 
InspVehOOS, 215 
InspViols, 216 
InsufficientSight, 155 
IntegratedRestraints, 240 
Interchange, 126 
InteriorDistractionCount, 107 
IntersectionType, 127 
InTransport, 364 
IntrusionLocation, 206 
IntrusionRow, 206 
Intrusions, 237 
ITSCount, 335 
ITSHeadway, 335 
ITSOther, 336 
ITSRollover, 336 
ITSSideObject, 336 

J 

JAK, 292 
Junction, 125 
Justification, 373 

K 

KnewRoad, 74 
KnewVehicle, 74 

L 

LastSleepEnd, 113 
LastSleepHours, 112 
LastSleepStart, 113 
LastWeekHours, 123 
LastWeekMoonlight, 124 
LeftDoorMirror, 334 
LeftFenderMirror, 334 
LeftLength, 16 
LegallyBlind, 99 
LevelCode, 297 
LFDeflated, 367 
LFRestricted, 366 
LiabilityInsurance, 316 

LicState, 60 
LightViolations, 91 
LoadObstructedView, 146 
LoadPressure, 79 
LocalGovernment, 278 
LocalViols, 216 
LRDeflated, 367 
LRRestricted, 366 

M 

MainSleepEnd, 116 
MainSleepHours, 115 
MainSleepStart, 115 
ManeuverCount, 88 
ManualBeltAvailable, 242 
ManualBeltFailure, 243 
ManualBeltProper, 243 
ManualBeltSource, 245 
ManualBeltUsed, 242 
ManufactureDate, 342 
Material, 196 
MaxCrushLocation, 37 
MaxWidth, 369 
MCMIScmvNonViolations, 195 
MCMIScmvViolations, 194 
MCMIScrashes, 194 
MedianWidth, 152 
Medium, 235 
MediumStatus, 235 
Migrant, 277 
Mileage, 282 
MileageYear, 282 
MinCoverageAmount, 315 
MirrorCount, 333 
Misjudgment, 85 
Mobility, 236 
Mortality, 247 
Motion, 224 
Movement, 259 
MovementCount, 19 
MultiEjection, 236 
MultiStage, 374 
MVH, 293 
Myopic, 99 

N 

NarrowRoad, 156 
NarrowShoulders, 156 
NCM, 293 
NCO, 293 
NewPosition, 75 
NoApplicableFatigue, 81 
NoApplicableRelations, 83 
NoDriverPresent, 69 
NoFactors, 101 
NonCMVCrashes, 191 
NonCMVViolations, 191 
NonMotorist, 271 
NonMotoristCount, 42 
NormalVision, 98 

LTCCS Codebook Index  382 


NoTraffic, 144 
NumOOSViols, 218 
NumViols, 218 

O 

ObjectContactClass, 27 
ObjectObscured, 154 
ObsceneGestures, 92 
Obscured, 66 
OCCAge, 230 
OCCFatality, 47 
OCCGender, 232 
OCCHeight, 231 
OCCInjSeverityCode, 247 
OCCLocation, 238 
OCCRestraintType, 238 
OccupantMovement, 108 
OccupantNumber, 5, 200, 230 
OCCWeight, 232 
OFR, 293 
OINDescription, 201 
OOB, 294 
Orientation, 225 
OTH, 294 
Other, 278 
OtherAggression, 93 
OtherBlackout, 98 
OtherCargos, 25 
OtherChangeSpecify, 163 
OtherComfortFactor, 79 
OtherControls, 108 
OtherDefect, 148 
OtherDefectSpecify, 148 
OtherExternal, 111 
OtherFactorCount, 101 
OtherFactorPhysical, 103 
OtherFatigue, 81 
OtherIllness, 98 
OtherInternal, 109 
OtherLiquids, 25 
OtherLocationMirror, 335 
OtherManeuver, 90 
OtherMovement, 21 
OtherPressure, 77 
OtherPressureCount, 81 
OtherProblem, 157 
OtherProblemSpecify, 158 
OtherRelations, 83 
OtherRetrieval, 109 
OtherSeizure, 97 
OtherSolids, 24 
OtherTraffic, 145 
OtherTrafficSpecify, 145 
OtherViewObstruction, 147 
OtherVision, 100 
OtherWeather, 161 
OtherWeatherSpecify, 161 
OutsideLocation, 106 
OVEAccidentType, 264 
OVEAlcohol, 267 
OVEAvoidance, 263 

OVECargoShift, 267 
OVEConfiguration, 259 
OVECrashCode, 265 
OVECriticalEvent, 260 
OVEDecision, 268 
OVEEnvironment, 270 
OVEJackKnife, 267 
OVELocation, 264 
OVEMake, 256 
OVEModel, 257 
OverallLength, 368 
OVEReason, 261 
OVERecognition, 268 
OVERightOfWay, 264 
OverrideDesc, 31 
OVESpeed, 271 
OVEStability, 263 
OVESurveillance, 269 
OVEYear, 258 
OVR, 294 

P 

PARAlcoholPresent, 186 
PARAlcoholTest, 186 
PARAlcoholTestResult, 186 
Paraplegia, 102 
ParBeltUsed, 234 
PARDescription, 273 
PARDrugsPresent, 188 
PARTestDelay, 187 
PARTestSource, 188 
PARViolationCode, 272 
PED, 294 
PersonalProblems, 68 
PlacardRequired, 333 
PoorCondition, 156 
PositionNumber, 27 
PostInclination, 241 
Posture, 238 
PowerUnitType, 326 
PreEventMovement, 49 
PretensionerActuated, 244 
PretensionerAvailable, 244 
PretensionerTravel, 244 
PrevViolations, 193 
PriorCrashes, 10 
PriorInclination, 241 
PriorMaintenance, 11 
PrivatePassengersBusiness, 277 
PrivatePassengersNonBusiness, 277 
PrivateProperty, 276 
Prosthesis, 101 
PVH, 295 

Q 

QuarterTurns, 355 
Quotas, 76 

LTCCS Codebook Index  383 


R 

Race, 233 
Railroad, 130 
RampSpeed, 156 
RanLights, 89 
RapidAcceleration, 92 
Rating, 318 
RatingDate, 317 
RearOverhang, 372 
RearTapeCond, 349 
RearTapePeel, 352 
ReasonCat, 52 
ReflectiveTapeMissingObscured, 151 
ReflectTapeColor, 351 
ReflectTapePattern, 350 
ReflectTapeType, 350 
Reportable, 196 
RestraintDamage, 239 
Retractor, 244 
ReviewDate, 318 
ReviewType, 319 
RFDeflated, 367 
RFRestricted, 366 
RightDoorMirror, 333 
RightFenderMirror, 334 
RightLength, 17 
RiskTaking, 227 
RoadAlignment, 131 
RoadGeometry, 155 
RoadProfile, 131 
RoadRelation, 125 
RoadSurface, 131 
Roadway, 270 
RoadwayClass, 130 
RoadwayFactorCount, 154 
Role, 233 
RollDirect, 357 
RollInitLocation, 356 
RollInitType, 355 
RollObject, 356 
RolloverType, 354 
RollTrip, 357 
Roof1, 179 
Roof2, 179 
Roof3, 180 
RotatingShift, 80 
Rotation, 120 
Row, 237 
RPM, 327 
RRDeflated, 367 
RRRestricted, 366 
RumbleStrip, 133 
RUN, 295 
RushHour, 145 

S 

SafetySEA, 323 
SCAStatus, 280 
SCDDate, 287 
SCDDateOfBirth, 288 

SCDFatalities, 290 
SCDInjuries, 290 
SCDState, 288 
SCDTowaway, 290 
ScheduledExtensions, 80 
Score, 321 
SCSFatalities, 284 
SCSInjuries, 285 
SCSTowaway, 286 
SCSYear, 284 
SDIDate, 297 
SDIDriverDOB, 299 
SDIHazMat, 302 
SDIState, 298 
SDITotalViolations, 301 
SDVOutOfService, 304 
SDVUnitType, 304 
SDVViolation, 303 
SeatLocation1, 6 
SeatLocation2, 6 
SeatOrientation, 239 
SeatPerformance, 240 
SeatRow1, 5 
SeatRow2, 6 
SeatType, 239 
SelfInducedIllegal, 77 
SelfInducedOther, 77 
SEP, 295 
Series, 177 
ShippingDeadline, 75 
ShortNoticeTrips, 82 
ShoulderType, 133 
ShoulderWidth, 133 
SideTapeCond, 350 
SideTapePeel, 352 
SightDistance, 153 
SightImpaired, 226 
SightLine, 66 
SightLineDistance, 134 
SightLineRestriction, 134 
SightRestricted, 226 
Signage, 128 
SignsMissing, 154 
SISTotal, 313 
SleepApnea, 102 
SleeperBerth, 327 
SlickSurface, 157 
Sloshing, 24 
Smoke, 162 
SocialSchedule, 68 
SparseTieDowns, 23 
Speeding, 84 
SpeedingBehavior, 90 
STACategory, 324 
STADate, 320 
StateGovernment, 278 
SteerableAxles, 349 
SteeringWheelProblem, 152 
StopRequired, 67 
Stratum, 138 
StreetAddress, 110 
StrenuousNonWork, 102 

LTCCS Codebook Index  384 


StrenuousRecreation, 102 
StrokeType, 16 
Subject, 105 
Summary, 44 
SurfaceCondition, 132 
SurfaceDefect, 132 
SuspensionFrameDeficiency, 151 
SwitchStatus, 8 
SwitchType, 8 

T 

Tailgating, 84 
TailgatingBehavior, 91 
TankCapacity, 346 
TankFailure, 25 
TankLoad, 347 
TestDelay, 72 
TestResult, 95 
TestSource, 71 
TEXConfiguration, 331 
TEXEmptyWeight, 329 
TEXSpeed, 328 
TEXTotalLength, 332 
TimeOfDeath, 251 
TimeStopped, 67 
TINDisposition, 338 
TINOutOfService, 338 
TINPosition, 337 
TINViolationCode, 337 
TireDeficiency, 149 
TireFailure, 147 
TotalCrashes, 192 
TOTALGVWR, 330 
TotalOOS, 301 
TowingUnitProblem, 151 
Tracking, 107 
TrackPosition, 240 
Traffic, 270 
TrafficControl, 129 
TrafficDensity, 78 
TrafficSpeed, 78 
TrailerCount, 329 
Transmission, 365 
TransmissionFailure, 148 
TravelLanes, 127 
Treatment, 47 
TRN, 295 
TruckCount, 42 
TUNBodyType, 339 
TUNCargoWeight, 343 
TUNEmptyWeight, 342 
TUNPosition, 339 
TUNSpillage, 348 
TUNTotalLength, 344 
TUNUnitType, 339 
TUNVIN, 341 

U 

UMO, 296 
UnderrideTapePeel, 351 

Undertaking, 88 
UnderWater, 157 
UnitNumber, 304 
UnitsTransfused, 254 
UNK, 296 
Unknown, 278 
UnknownCause, 25 
UnknownFactor, 69 
UnknownVision, 100 
UnkTypeCrashes, 194 
UnpaidLoading, 82 
UnscheduledExtensions, 81 
UnspecifiedExternal, 111 
Upset, 73 
USMail, 277 

V 

VariableCompensation, 82 
VehicleCount, 41 
VehicleDefectCount, 146 
VehicleDisposition, 373 
VehicleInspections, 308 
VehicleLightingDeficiency, 150 
VehicleLoad, 79 
VehicleObscured, 155 
VehicleOutOfService, 308 
VehicleOutOfServicePerc, 309 
VehicleOverweight, 150 
VehicleSEA, 323 
VehicleState, 270 
VehicleType, 182 
VehicleViolationsAverage, 310 
VEXBodyType, 360 
VEXCargoSource, 362 
VEXCargoWeight, 362 
VEXCurbWeight, 370 
VEXInspectionDate, 364 
VEXSpecialUse, 363 
VEXVehicleClass, 361 
VEXVIN, 363 
VEXWeightSource, 361 
VINBodyType, 178 
VINMake, 174 
VINModel, 176 
VINWeight, 182 
VINYear, 176 
ViolationNumber, 59 
ViolationType, 338 
ViolDesc, 219 
ViolDescription, 64 

W 

Waiver, 197 
WashedOut, 157 
WeakTieDowns, 23 
Weather, 270 
WeatherCount, 159 
Weaving, 91 
WeekAverage, 119 
WeekLongest, 118 

LTCCS Codebook Index  385 


WeekShortest, 119 
Wheelbase, 368 
WheelConfig, 183 
WhileCount, 210 
WindGust, 160 
WorkDaysLost, 249 
WorkFatigueCount, 80 
WorkPressureCount, 75 

WrongTurnLane, 89 
WrongWay, 89 
WZE, 296 

Z 

ZipCode, 189 

LTCCS Codebook Index  386