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Census of

Transportation

TC92-T-37

Issued October 1994

Oklahoma

PURPOSES AND USES OF THE ECONOMIC

CENSUS

The economic census is the major source of facts about

the structure and functioning of the Nation’s economy. It

provides essential information for government, business,

industry, and the general public.

The economic census furnishes an important part of the

framework for such composite measures as the gross

domestic product, input/output measures, production and

price indexes, and other statistical series that measure

short-term changes in economic conditions.

Policymaking agencies of the Federal Government use

the data, especially in monitoring economic activity and

providing assistance to business.

State and local governments use the data to assess

business activities and tax bases within their jurisdictions

and to develop programs to attract business.

Trade associations study trends in their own and competing industries and keep their members informed of

market changes.

Individual businesses use the data to locate potential

markets and to analyze their own production and sales

performance relative to industry or area averages.

AUTHORITY AND SCOPE

Title 13 of the United States Code (sections 131, 191,

and 224) directs the Census Bureau to take the economic

census every 5 years, covering years ending in 2 and 7.

The 1992 Economic Census consists of the following eight

censuses:

• Census of Retail Trade

• Census of Wholesale Trade

• Census of Service Industries

• Census of Financial, Insurance, and Real Estate

Industries

• Census of Transportation, Communications, and Utilities

• Census of Manufactures

• Census of Mineral Industries

• Census of Construction Industries

Special programs also cover enterprise statistics and

minority-owned and women-owned businesses. (The 1992

Census of Agriculture and 1992 Census of Governments

are conducted separately.) The next economic census is

scheduled to be taken in 1998 covering the year 1997.

AVAILABILITY OF THE DATA

The results of the economic census are available in

printed reports for sale by the U.S. Government Printing

Office and on compact discs for sale by the Census

Bureau. Order forms for all types of products are available

on request from Customer Services, Bureau of the Census,

Washington, DC 20233-8300. A more complete description of publications being issued from this census is on the

inside back cover of this document.

Census facts are also widely disseminated by trade

associations, business journals, and newspapers. Volumes containing census statistics are available in most

major public and college libraries. Finally, State data

centers in every State as well as business and industry

data centers in many States also supply economic census

statistics.

WHAT’S NEW IN 1992

The 1992 Economic Census covers more of the economy

than any previous census. New for 1992 are data on

communications, utilities, financial, insurance, and real

U.S. Department of Commerce

Economics and Statistics Administration

BUREAU OF THE CENSUS

For sale by Superintendent of Documents, U.S. Government

Printing Office, Washington, DC 20402.

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estate, as well as coverage of more transportation industries. The economic, agriculture, and governments censuses now collectively cover nearly 98 percent of all

economic activity.

Among other changes, new 1992 definitions affect the

boundaries of about a third of all metropolitan areas. Also,

the Survey of Women-Owned Businesses has now been

expanded to include all corporations.

HISTORICAL INFORMATION

The economic census has been taken as an integrated

program at 5-year intervals since 1967 and before that for

1963, 1958, and 1954. Prior to that time, the individual

subcomponents of the economic census were taken separately at varying intervals.

The economic census traces its beginnings to the 1810

Decennial Census, when questions on manufacturing were

included with those for population. Coverage of economic

activities was expanded for 1840 and subsequent censuses to include mining and some commercial activities. In

1902, Congress established a permanent Census Bureau

and directed that a census of manufactures be taken every

5 years. The 1905 Manufactures Census was the first time

a census was taken apart from the regular every-10-year

population census.

The first census of business was taken in 1930, covering 1929. Initially it covered retail and wholesale trade and

construction industries, but it was broadened in 1933 to

include some of the service trades.

The 1954 Economic Census was the first census to be

fully integrated—providing comparable census data across

economic sectors, using consistent time periods, concepts, definitions, classifications, and reporting units. It

was the first census to be taken by mail, using lists of firms

provided by the administrative records of other Federal

agencies. Since 1963, administrative records also have

been used to provide basic statistics for very small firms,

reducing or eliminating the need to send them census

questionnaires. The Enterprise Statistics Program, which

publishes combined data from the economic census, was

made possible with the implementation of the integrated

census program in 1954.

The range of industries covered in the economic censuses has continued to expand. The census of construction industries began on a regular basis in 1967, and the

scope of service industries was broadened in 1967, 1977,

and 1987. The census of transportation began in 1963 as

a set of surveys covering travel, transportation of commodities, and trucks, but expanded in 1987 to cover business

establishments in several transportation industries. For

1992, these statistics are incorporated into a broadened

census of transportation, communications, and utilities.

Also new for 1992 is the census of financial, insurance,

and real estate industries. This is part of a gradual expansion in coverage of industries previously subjected to

government regulation.

The Survey of Minority-Owned Business Enterprises

was first conducted as a special project in 1969 and was

incorporated into the economic census in 1972 along with

the Survey of Women-Owned Businesses.

An economic census has also been taken in Puerto

Rico since 1909, in the Virgin Islands of the United States

and Guam since 1958, and in the Commonwealth of the

Northern Mariana Islands since 1982.

Statistical reports from the 1987 and earlier censuses

provide historical figures for the study of long-term time

series and are available in some large libraries. All of the

census data published since 1967 are still available for

sale on microfiche from the Census Bureau.

AVAILABILITY OF MORE FREQUENT

ECONOMIC DATA

While the census provides complete enumerations every

5 years, there are many needs for more frequent data as

well. The Census Bureau conducts a number of monthly,

quarterly, and annual surveys, with the results appearing in

publication series such as Current Business Reports (retail

and wholesale trade and service industries), the Annual

Survey of Manufactures, Current Industrial Reports, and

the Quarterly Financial Report. Most of these surveys,

while providing more frequent observations, yield less

kind-of-business and geographic detail than the census.

The County Business Patterns program offers annual

statistics on the number of establishments, employment,

and payroll classified by industry within each county.

SOURCES FOR MORE INFORMATION

More information about the scope, coverage, classification system, data items, and publications for each of the

economic censuses and related surveys is published in the

Guide to the 1992 Economic Census and Related Statistics. More information on the methodology, procedures,

and history of the census will be published in the History of

the 1992 Economic Census. Contact Customer Services

for information on availability.

TRUCK INVENTORY AND USE SURVEY, 1992

CENSUS OF TRANSPORTATION

The Truck Inventory and Use Survey (TIUS) provides

data on the physical and operational characteristics of the

Nation’s truck population. It is based on a probability

sample of private and commercial trucks registered (or

licensed) in each State during 1992. A sample of over

150,000 trucks were surveyed to measure the universe of

over 60 million trucks.

The following types of vehicles were excluded from this

survey: those owned by Federal, State, and local governments, ambulances, buses, and motor homes. A small

number of the vehicles sampled were determined to be

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‘‘out-of-scope’’ of the survey. These cases include but are

not limited to: farm tractors, unpowered trailer units, and

trucks reported to have been sold, junked, or wrecked prior

to the registration year.

Many States allow pickups, small vans, and utility-type

vehicles to be registered as either cars or trucks. The

passenger car files were searched and any such trucks

were included in the universe of trucks from which the

sample was selected. Some vehicles such as ‘‘off-highway’’

trucks used exclusively on private property do not have to

be registered. These vehicles were not included in the

universe and had no chance of being selected.

USES OF THE TRUCK INVENTORY AND USE

SURVEY

TIUS information is of considerable value to Federal,

State, and local transportation agencies in planning highway cost allocations, road improvements, truck size and

weight issues, user fees of commercial and private vehicles,

energy consumption, and other aspects of improving transportation services for shippers and carriers. The Federal

Government also uses these data as an important framework for the national investment and personal consumption expenditures component of the Gross Domestic Product (GDP), input-output tables, economic development

evaluation, maintenance of vital statistics for prediction of

future economic and transportation trends, logistical requirements, and regulatory impact analysis.

Industry, business, academia, and the general public

need these data to assess the truck population’s involvement with intermodal use, conduct market studies and

evaluate market strategies, assess the utility and cost of

certain types of equipment, calculate the longevity of

products, determine fuel demands and needs for fuel

efficiency, and assess the effects of deregulation on the

restructuring of the transportation industries. TIUS data are

regularly used to link to and more accurately utilize other

data sets representing limited segments of the truck

universe.

UNPUBLISHED DATA

Mileage estimates will not be shown separately in

individual State reports for 1992 as they were in past TIUS

State reports. State mileage estimates do not represent

mileage activity within the State. Mileage estimates will be

shown in the U.S. Summary Report for the Nation’s truck

population. Other physical and operational characteristics

estimates not shown separately in this report are produced

as a by product of the published statistics. These additional data have not been published because of their high

sampling variability, poor response quality, or other factors

that resulted in their failure to meet Census Bureau standards for publication.

The Bureau of the Census, upon written request, will

release such figures for individual use. It should be noted

that some unpublished figures can be derived from this

report by subtracting published data from their respective

totals. However, such figures would be subject to the high

sampling variability described previously. These unpublished estimates are for your internal use only.

VEHICLE REGISTRATIONS

The annual vehicle registration date varies among the

States. A few States use the calendar year for registering

all vehicles. Most States register their vehicle on a staggered basis to permit a distribution of the renewal workload

thoughout all months. Most States allow preregistration or

permit ‘‘grace periods’’ to better distribute the annual

registration workload.

In order to present vehicle registration data uniformly for

all States, the data are shown as nearly as possible on a

1992 calendar-year basis.

Registration practices for commercial vehicles differ

greatly among the States. Some States register a tractorsemitrailer combination as a single unit; others register the

tractor and the semitrailer separately. For either, only the

power units are included in the registered truck counts.

TRUCK CHARACTERISTICS

The estimated number of trucks that were within the

scope of the TIUS and registered in the State during 1992

was 1,080.1 thousand, a 19.5 percent increase from 1987.

The Federal Highway Administration (FHWA) estimate

of the number of private and commercial trucks registered

in the State as of December 31, 1992, was 927.0 thousand. This estimate is based on a calendar year summary

report from each State. It reflects differences in truck

definitions used by each State for vehicle registration from

those used in the TIUS.

COMPARABILITY WITH PREVIOUS SURVEYS

Although the basic purpose and scope of the previous

Truck Inventory and Use Surveys were essentially the

same as this one, some new items were introduced in

1992 as well as some changes that may affect specific

items in this report.

New items introduced in 1992:

1. Empty weight of pickups, vans, minivans, utilitytype vehicles, and station wagons on truck chassis. Respondents who received the TC-9501 questionnaire were asked to report the empty weight (vehicle

weight minus cargo weight) of the vehicle as it was

usually operated.

2. Number of weeks operated. Respondents were asked

to report the number of weeks during 1992 the vehicle

was operated.

3. No home base. Respondents were asked to report if

the vehicle or vehicle/trailer(s) combination was used

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for consumer one-way truck rental or as an over-theroad truck tractor and did not operate from a home

base location. Data for these vehicles are tabulated

under percentage of miles traveled outside base of

operation State.

4. Type of home base. Respondents were asked to

report the type of location where the vehicle was

usually parked when it was not on the road. This

information is available on the public-use microdata

product only.

5. Bobtail. Owners of large trucks who reported the

vehicle was usually operated as a straight truck or

truck tractor pulling a trailer were asked to report the

approximate percentage of 1992 mileage that no

trailer was pulled. This information is available on the

public-use microdata product only.

6. Trailer/axle configuration. Owners of large trucks

who reported the vehicle was usually operated as a

straight truck or truck tractor pulling one or more

trailers were asked to report the approximate percentage of 1992 mileage of the trailer/axle configuration

most often pulled.

7. Exterior length of trailer(s). Owners of large trucks

who reported the vehicle was usually operated as a

straight truck or truck tractor pulling one or more

trailers were asked to report the exterior length of the

individual trailer(s) most often pulled. This information

is available at the U.S. level and on the public-use

microdata product.

8. Type of refueling locations. Owners of large trucks

were asked the type of location where the vehicle was

primarily refueled during 1992.

9. Kind of service. Owners of large trucks who reported

the vehicle was operated with for-hire authorization

were asked to report the approximate percentage of

1992 mileage by truckload and less-than-truckload

service.

1992 changes affecting specific items:

1. How disposed. An ‘‘other’’ category was added as a

separate response to determine other types of disposal. This information is available on the public-use

microdata product only.

2. When disposed. If a vehicle was disposed of on or

after July 1, 1991, but prior to January 1, 1992,

respondents were asked to report vehicle’s use during

calendar year 1991. This methodology replaces respondents reporting ‘‘last 12 months use’’ of those vehicles

which were owned (or leased) and disposed of prior to

the survey year.

3. How obtained. An ‘‘other’’ category was added as a

separate response to determine other ways of vehicle

acquisition.

4. Piggyback, conventional trailers or containers. A

separate category for conventional trailers was added

to complete inclusion of all intermodal equipment haul

types. This information is available on the public-use

microdata product only.

5. Overall length. Separate check box ranges were

developed for length to replace 1987 specific response.

6. Width of trailer. Separate check box ranges were

developed for width to replace 1987 specific response.

This information is available on the public-use microdata product only.

7. Range of operation. Separate responses for ‘‘trips

between 200 and 500 miles’’ and ‘‘trips beyond 500

miles’’ were added. The 1987 response of ‘‘trips

between 50 and 200 miles’’ was divided into two

separate responses for 1992: (1) trips between 50 and

100 miles and (2) trips between 100 and 200 miles

from vehicle’s homebase location.

8. Brakes. An ‘‘other’’ category was added as a separate response to determine other types of brakes.

9. Standard or optional equipment. New categories

were added to the list of equipment characteristics.

They are: (1) antilock brake system and (2) on-board

computer/electronic vehicle management system on

both questionnaires. In addition, the TC-9501 questionnaire (small trucks) included additional new categories: (1) vehicle control aids for handicapped drivers

and (2) wheelchair lifts.

10. Personal transportation. ‘‘Carpool’’ use vehicles in

a nonbusiness capacity are included in the personal

transportation category.

11. For-hire operation type. A ‘‘private fleet’’ category

was added with two separate responses on the TC-9502

questionnaire requesting the percentages of 1992

mileage the vehicle operated as: (1) a private carrier

and (2) a private carrier with for-hire authority (i.e.,

backhauls, trip leasing, etc.). This information is available on the public-use microdata product only.

12. Products carried. New categories were added to the

list of products carried. They are: (1) passenger transportation (the TC-9501 questionnaire only), (2) no load

(vehicle empty), (3) animal feed, (4) recyclable products. ‘‘Hazardous waste’’ collected in 1987 was divided

into two separate categories for 1992: (1) EPA manifest and (2) non-EPA manifest.

13. Engine type. Separate responses for leaded and

unleaded gasolines were developed to determine fuel

use by engine. Published results of engine type are

cited for ‘‘gasoline’’ only. Leaded and unleaded gasoline use is available on the public-use microdata

product only.

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14. Miles per gallon. Check box ranges were developed

on the TC-9501 questionnaire replacing the 1987

specific response for pickups, vans, utility-type vehicles,

minivans, and station wagons on truck chassis.

15. Hazardous materials carried. The 1987 check box

percentage ranges of placard-required hazardous materials mileage were replaced with individual mileage

percentage responses of each placard-required hazardous material hauled during 1992. The published

results represent the number of trucks which hauled

placard-required hazardous materials during 1992

because multiple responses were possible. Data are

displayed under the new and revised placard name

categories.

16. Fleet size. Check box ranges were developed for the

total number of vehicles/trailers owned and/or operated by an individual or for a company replacing the

1987 data item requesting fleet composition of vehicles

and equipment on an establishment basis.

17. Horsepower. This item was deleted from the questionnaire and data will not be available.

18. Cubic inch displacement (CID). This item was deleted

from the questionnaire, but the published data were

derived from an analysis of the administrative record

data and are included in the tables. ‘‘Not reported’’

indicates those trucks for which the CID are unknown.

19. Number of cylinders. The published data were derived

from an analysis of the administrative record data and

are included in the tables. ‘‘Not reported’’ indicates

those trucks for which cylinders are unknown.

EXPLANATION OF TERMS

Major use. This item is based on the business or the part

of the business in which the vehicle was used. The 15

specific major use categories conform to the generally

accepted meaning of the terms.

Responses in the ‘‘Other’’ category were recoded to

one of the specific categories, if possible. The category

‘‘Not in use’’ in table 2 includes vehicles which, though

licensed, were not operated or were wrecked/inoperative

for more than 6 months during 1992.

Body type. This category includes the type of body that is

either permanently attached to the power unit (i.e., straight

or single-unit truck) or most frequently used with a truck

tractor as a tractor-trailer combination.

Minivans. The minivan universe includes vehicles which

are manufactured on a truck or passenger car chassis.

Home base. The location where the vehicle was usually

parked when it was not on the road.

Range of operation. The type of trip in which the vehicle

usually operates is classified as one of the following:

1. Local. Less than 50-miles from vehicle’s home base

(the farm, terminal, factory, mine, or other place where

the vehicle is stationed).

2. Short range. Trips between 50 and 100 miles from

vehicle’s home base.

3. Short range-medium. Trips between 100 and 200

miles from vehicle’s home base.

4. Long range-medium. Trips between 200 and 500

miles from vehicle’s home base.

5. Long range. Trips beyond 500 miles from vehicle’s

home base.

6. No home base. Vehicle (usually an over-the-road

truck tractor or consumer one-way rental) which did

not operate from one specific home base location.

7. Off-the-road. Minimal use of public roads (usually

associated with construction and farming activities).

Vehicle size. This size classification is based on the

average vehicle weight (empty weight of the vehicle plus

the average weight of the load carried) at which the vehicle

operated during 1992. The four size classes are:

1. Light. Average vehicle weight of 10,000 pounds or

less.

2. Medium. Average vehicle weight of 10,001 to 19,500

pounds.

3. Light-heavy. Average vehicle weight of 19,501 to

26,000 pounds.

4. Heavy-heavy. Average vehicle weight of 26,001 pounds

or more.

Operator classification. This item consists of not for hire,

for hire, daily rental, and mixed.

1. Not for hire. Includes a private owner or a company

which transports its own materials or merchandise or

uses the vehicle for personal transportation.

2. For hire. Includes the following:

a. Motor carrier. Those vehicles operated by a company whose primary business is to provide transportation services carrying freight belonging to others.

b. Owner/operator. Vehicles operated by an independent trucker who drives the vehicle for himself

or on lease to a company.

3. Daily rental. Vehicles rented or leased out under daily

or short-term rental or lease agreements (not motor

carrier).

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4. Mixed. A mixture of the operator classifications above

with equal percentages of use for at least two of the

three categories. If the percentages were not equal,

the answer was recoded to the operator classification

with the highest percentage.

5. Type of carrier. These categories are limited to for

hire, interstate operators:

a. Contract. Offers transportation services to certain

shippers under contracts.

b. Common. Offers transportation services to the

general public over regular or irregular routes.

c. Exempt. Transports commodities or provides types

of services that are exempt from federal regulation,

could also operate within exempt commercial zones.

Products carried. This item includes broad classifications of agricultural, manufacturing, mineral products, and

special categories of materials carried by trucks. Responses

to the ‘‘Other’’ category were recoded to 1 of the 29

specific categories if possible.

Hazardous materials. This category was designed to

identify those trucks which regularly transport hazardous

materials in quantities large enough to require a placard

under the Code of Federal Regulations, Title 49, (CFR.177.823)

Transportation.

Truck fleet size. The size of the truck fleet is based on

the number of trucks operated by a truck owner for its

entire operation. The data shown in the ‘‘Truck Fleet Size’’

section of the tables are based on the number of trucks

found in fleets of specified size and not the number of

fleets. (If this item on the survey form was unanswered, the

vehicle was estimated in the ‘‘not reported’’ category.)

SAMPLE DESIGN

A probability sample of 3,098 trucks was selected to

represent the universe of trucks registered in the State in

1992. The sample was drawn from a universe of active

registrations in the State at some date, generally between

July 1 and December 31, 1992. If necessary an adjustment

was made to account for new truck registrations which

occurred after this date but before the end of 1992. The

universe excluded those trucks that were identified, from

the registration information, as outside of the scope of

TIUS.

The trucks were selected using a stratified, random

sample design. The universe, or population, of trucks

within the State was divided into five strata: ‘‘pickup,’’

‘‘van,’’ ‘‘single-unit light,’’ ‘‘single-unit heavy,’’ and ‘‘truck

tractor.’’ The ‘‘pickup’’ stratum consisted of all pickup

trucks. The ‘‘van’’ stratum consisted of panel trucks, vans

(including minivans), utility-type vehicles (including jeeps),

and station wagons on truck chassis. The ‘‘single-unit

light’’ stratum consisted of all single-unit trucks (excluding

those in the pickup and van strata) with a gross vehicle

weight (GVW) of 26,000 pounds or less. The ‘‘single-unit

heavy’’ stratum consisted of the remaining single-unit

trucks. The ‘‘truck tractor’’ stratum consisted of only truck

tractors. Within each of these strata, a predetermined

number of trucks were selected for the sample. All trucks

were selected at random with equal probabilities of selection within a stratum.

SURVEY METHOD

For each selected truck, a report form was mailed to the

owner identified in the State’s registration records. The

owner was asked to respond only for the truck identified by

the vehicle registration information imprinted on the form,

regardless of whether or not he still owned the vehicle. The

information received on the returned questionnaires was

processed through an extensive computer edit. Reports

which contained questionable responses were reviewed

and corrected if necessary. Because estimates are to

cover calendar year 1992, if necessary an adjustment was

made to account for new trucks registered after the date

covered by the sampling frame but before December 31,

1992.

In each stratum, estimates of the number of trucks for

each characteristic were developed by expanding the

observations from the respondents to represent all trucks

in the stratum within the scope of the TIUS. The stratum

estimates were then summed across strata to form the

estimates published for the State.

This methodology to account for trucks purchased new

and registered in the latter half of 1992 which were not

covered by the sampling frame differs from that used in the

1987 TIUS.

RELIABILITY OF THE ESTIMATES

The accuracy of the survey results is determined by the

joint effects of sampling variability and nonsampling errors.

The sources of error are discussed in the following paragraphs.

Sampling variability. The particular sample drawn in the

State is one of a large number of all possible samples of

the same size that could have been selected using the

same design. Estimates derived from these different samples

would differ from each other and from the unknown total

that would be obtained if all trucks in the State were

surveyed (the universe value). Ignoring the effects of

nonsampling error, the average of these estimates would

equal the universe value. The standard error of the estimate is a measure of the variability among the estimates

from all possible samples of the same size and design. It

measures how precisely we can expect to estimate the

unknown universe value. The relative standard error (RSE),

expressed as a percentage, is the standard error of the

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estimate times 100 divided by the value being estimated.

Note that the RSE’s given in table 2, are derived from the

sample and are themselves subject to sampling variability.

An estimate and its standard error, developed from a

particular sample, can be used to construct an interval

estimate called a confidence interval. (The standard error

referred to here is itself an estimate developed from the

sample.) Associated with each interval is a percentage of

confidence (for example, 90 percent) which should be

interpreted as follows. For each possible sample, assume

that an estimate and its standard error were obtained.

Then, for about 90 percent of all the samples, the interval

from 1.65 standard errors below to 1.65 standard errors

above the estimate would include the unknown value being

estimated. The following is an example of a confidence

interval calculation: Assume the number of basic platform

trucks given in table 2 is 20.5 thousand with an RSE of

10.2 percent. Then the standard error of the estimate is

20.5 x .102 = 2.09 thousand trucks. Now, the 90 percent

confidence interval (the estimate plus or minus 1.65 standard errors) is 20.5 plus or minus 3.4, or 17.1 to 23.9

thousand trucks. In table 2, some data cells have RSE’s

that are large, and the resulting confidence intervals could

be quite wide. The user should use such estimates with

caution.

Nonsampling errors. Nonsampling errors cover all sources

of errors in the estimates that cannot be attributed to

sampling variability. This includes errors in the reporting,

collecting, and processing of data as well as the inability to

obtain responses from some sampled units. Nonsampling

errors lead to biases in the estimates. Bias exists if an

estimate, averaged over all possible samples, does not

equal the true value being estimated.

A major source of possible bias is nonresponse. There

are two types of nonresponse. ‘‘Total nonresponse’’ occurs

when no response to the questionnaire was received. In

most cases, the form was never returned to the Census

Bureau, after several attempts to elicit a response. For the

State, approximately 88.5 percent of the questionnaires

were returned with some response. ‘‘Item nonresponse’’

applies to an individual item or question which was unanswered, although some response to the questionnaire was

received. Several followups, by mail and telephone, were

done to reduce both types of nonresponse. The details to

account for total nonresponse and item nonresponse are

given below.

For most sections in table 2, total nonresponse is

handled, within the estimation procedure, by allocating

characteristics to the total nonrespondents in proportion to

the characteristics observed for the respondents. The

amount of bias introduced in this way depends on the

extent that the nonrespondents differ, characteristically,

from the respondents.

For most sections in the table, item nonresponse is

included as a separate line. For example, respondents who

did not indicate the major uses of their trucks are included

in the ‘‘not reported’’ category. This line shows the part of

the total estimate (for that table section) which is missing

from the estimates by major use. Users should exercise

caution in allocating the not reported figure to the major

uses, since the characteristics of item nonrespondents

may differ significantly from those of the respondents. For

some questions, a response was generated if it could be

derived from other data. For example, engine and body

characteristics were frequently determined through analysis of the vehicle identification number and charts based

on manufacturers’ specifications. Missing length and average weight data were imputed for each individual truck

based on the response from a record with similar characteristics which were correlated with length and/or average

weight.

ABBREVIATIONS AND SYMBOLS

The following abbreviations and symbols are used in

this publication:

(NA) Not available due to new data item or definitional differences.

(S) Withheld because estimate did not meet publication standards on the basis of either the

response rate, associated standard error, or a

consistency review.

(Z) Represents less than 50 trucks or .05 percent,

as appropriate for the data column.

RSE Relative standard error.

TRANSPORTATION—TRUCK INVENTORY AND USE SURVEY OKLAHOMA OK–7
TIPS [UPF] S_CASTILLO [SPECPROJ,S_CASTILLO SPECPROJ 10/21/94 7:37 AM MACHINE: EPCV24 DATA:TIPS_DATA.DAT;195 10/21/94 07:36:00 TAPE: NOreel FRAME: 1

TSF:TIPS92-07362546.DAT;1 10/21/94 07:36:33 UTF:TIPS93-07362546.DAT;1 10/21/94 07:36:33 META:TIPS96-07362546.DAT;1 10/21/94 07:36:59

Table 1. TrucksmComparative Summary: 1992 and Earlier Years

[Percent. Data relate to State of registration. Detail may not add to total because of rounding. For meaning of abbreviations and symbols, see introductory text]

Vehicular and operational characteristics 1992 1987 1982 1977

Total 100.0 -------------------------------------- 100.0 100.0 100.0

MAJOR USE

Agriculture 12.6 --------------------------------------- 14.5 14.3 28.5

Forestry and lumbering .4 ---------------------------- .2 .2 .1

Mining and quarrying 1.4 ------------------------------ 2.1 1.8 1.5

Construction 9.2 ------------------------------------- 7.8 11.7 8.6

Manufacturing .6 ------------------------------------ 1.1 1.5 1.0

Wholesale and retail trade 6.7 ------------------------- 5.0 4.2 5.9 For-hire transportation 1.7 ---------------------------- 1.6 1.5 .4 Utilities and service 6.2 ------------------------------- 4.1 3.7 6.6 Personal transportation 57.0 ---------------------------- 62.9 58.4 42.7 Other 4.2 ------------------------------------------- .6 2.7 4.6

BODY TYPE

Pickup, panel, or minivan 1 ------------------------- 89.4 88.5 85.4 85.4

Platform and cattlerack 4.1 ---------------------------- 4.7 6.4 8.3

Van 1.8 --------------------------------------------- 1.4 2.2 1.2

Public utility .2 -------------------------------------- .2 .3 .7

Multistop or stepvans 2 ---------------------------- .3 .7 .2 .3

Dump .7 ------------------------------------------- 1.0 .8 1.2 Tank for liquids or dry bulk .7 ------------------------ .7 1.2 .6 Other 2.7 ------------------------------------------- 2.7 3.5 2.0

VEHICLE SIZE

Light 90.2 -------------------------------------------- 91.8 88.7 88.6

Medium 4.1 ----------------------------------------- 2.6 4.4 6.4

Light-heavy 1.7 -------------------------------------- 1.7 2.1 2.3

Heavy-heavy 4.0 ------------------------------------- 4.0 4.8 2.6

ANNUAL MILES

Less than 5,000 27.0 ---------------------------------- 27.4 33.7 27.0

5,000 to 9,999 19.4 ----------------------------------- 23.1 24.6 19.7

10,000 to 19,999 32.9 --------------------------------- 32.8 27.3 39.0

20,000 to 29,999 11.6 --------------------------------- 9.6 10.4 7.5

30,000 or more 9.1 ----------------------------------- 7.0 4.0 6.8

Vehicular and operational characteristics 1992 1987 1982 1977

YEAR MODEL

1 to 2 years old 14.6 ---------------------------------- 10.9 8.3 17.0

3 to 4 years old 13.3 ---------------------------------- 13.3 15.1 12.9

Over 4 years old 72.1 --------------------------------- 75.8 76.6 70.1

VEHICLE ACQUISITION

Purchased new 42.3 ----------------------------------- 38.8 40.4 45.0

Purchased used 56.2 ---------------------------------- 60.0 57.7 53.3

Leased from someone, other, and not reported 2 3---- 1.5 1.2 1.9 1.7

TRUCK TYPE

Single-unit trucks 95.0 --------------------------------- 94.5 94.5 98.7

2 axles 85.8 ---------------------------------------- 93.5 93.0 97.4

3 axles or more 9.2 -------------------------------- 1.1 1.5 1.3

Combination 5.0 ------------------------------------- 5.5 5.5 1.1

3 axles (Z) ---------------------------------------- 1.9 1.5 .1

4 axles .1 ---------------------------------------- 1.7 2.1 .4

5 axles or more 4.9 -------------------------------- 1.9 1.9 .6

Trailer not specified (Z) ----------------------------- (Z) (Z) (Z)

RANGE OF OPERATION

Local 67.7 -------------------------------------------- 75.3 71.9 83.1

Short-range 15.3 -------------------------------------- 12.4 10.6 6.8

Long-range 4.7 -------------------------------------- 4.7 4.9 1.2

Off-the-road and not reported 12.3 ---------------------- 7.6 12.7 8.9

FUEL TYPE

Gasoline 91.0 ----------------------------------------- 93.8 92.2 97.0

Diesel, liquefied gas, and other 2-------------------- 8.4 6.2 7.8 2.7

Not reported .6 ------------------------------------- .1 (Z) .3

1Vans similar to panel trucks are included in pickup, panel, or minivan.

2New category or modified data line from 1987.

3Includes trucks which reported an "other" type of vehicle acquisition.

OK–8nnOKLAHOMA TRANSPORTATIONmTRUCK INVENTORY AND USE SURVEY
TIPS [UPF] S_CASTILLO [SPECPROJ,S_CASTILLO SPECPROJ 10/21/94 7:37 AM MACHINE: EPCV24 DATA:TIPS_DATA.DAT;195 10/21/94 07:36:00 TAPE: NOreel FRAME: 2

TSF:TIPS92-07362546.DAT;1 10/21/94 07:36:33 UTF:TIPS93-07362546.DAT;1 10/21/94 07:36:33 META:TIPS96-07362546.DAT;1 10/21/94 07:36:59

Table 2. TrucksmComparative Vehicular and Operational Characteristics: 1992 and

1987

[Data relate to State of registration. Detail may not add to total because of rounding. For meaning of abbreviations and symbols, see introductory text]

Vehicular and operational

characteristics

All trucks Trucks, excluding pickups, panels, vans,

utilities, and station wagons

Relative standard error of estimate

(percent) for column m

1992 trucks

(thousands)

1987 trucks

(thousands)

Percent

change

1992 to

1987

1992 trucks

(thousands)

1987 trucks

(thousands)

Percent

change

1992 to

1987

A B C D E F A B C D E F

Total trucks 1 --------------------------------------- 080.1 903.6 19.5 114.9 104.0 10.4 .6 .4 .7 2.2 2.4 3.3

MAJOR USE

Agriculture 135.7 ----------------------------------------------- 131.3 3.4 32.8 35.3 –7.1 8.5 8.1 11.7 5.4 4.7 7.2

Forestry and lumbering (S) ------------------------------------ 1.5 (S) .8 1.5 –48.3 (S) 27.0 (S) 38.8 27.0 47.2

Mining and quarrying 15.2 -------------------------------------- 19.0 –19.9 4.9 7.1 –30.5 25.3 21.1 32.9 11.6 10.9 16.0

Construction 99.7 --------------------------------------------- 70.9 40.6 16.4 17.4 –5.8 10.6 11.6 15.7 8.2 7.5 11.1

Manufacturing 6.9 -------------------------------------------- 10.2 –32.3 3.7 2.3 63.6 31.0 31.9 44.5 16.3 16.7 23.3

Wholesale trade 20.1 ------------------------------------------ 12.4 62.9 7.1 5.8 23.4 21.9 24.6 32.9 12.1 13.4 18.1

Retail trade 52.0 ---------------------------------------------- 32.8 58.3 8.3 5.0 64.3 15.0 18.3 23.7 12.4 15.7 20.0

For-hire transportation 18.0 ------------------------------------ 11.6 55.4 15.1 11.6 30.5 12.0 12.9 17.6 4.7 12.9 13.8

Utilities 15.8 -------------------------------------------------- 5.3 200.9 2.7 2.6 1.7 27.5 37.3 46.3 23.2 22.4 32.3

Services 50.8 ------------------------------------------------- 32.0 58.8 5.7 4.0 41.7 16.0 18.8 24.7 37.5 17.4 41.3

Daily rental 1.0 ---------------------------------------------- 2.4 –56.4 1.0 2.4 –56.4 16.2 24.1 29.0 16.2 24.1 29.0

One-way rental 5.4 ------------------------------------------- (Z) (Z) 5.4 (Z) (Z) 7.8 (Z) (Z) 7.8 (Z) (Z)

Personal transportation 616.0 ------------------------------------ 568.5 8.4 2.8 4.8 –42.2 3.0 2.7 4.0 22.2 40.1 45.8

Other (S) --------------------------------------------------- (Z) (Z) (S) (Z) (Z) (S) (Z) (Z) (S) (Z) (Z)

Not in use 39.3 ----------------------------------------------- 5.7 594.7 8.1 4.2 94.7 16.8 26.1 31.1 11.8 15.2 19.3

Not reported (Z) --------------------------------------------- (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z)

BODY TYPE

Pickup 714.5 --------------------------------------------------- 640.8 11.5 (Z) (Z) (Z) 1.1 .7 1.3 (Z) (Z) (Z)

Minivan 67.8 -------------------------------------------------- 18.5 267.1 (Z) (Z) (Z) 12.7 25.3 28.3 (Z) (Z) (Z)

Panel or van 65.7 --------------------------------------------- 68.6 –4.3 (Z) (Z) (Z) 12.8 10.8 16.8 (Z) (Z) (Z)

Utility 98.4 ---------------------------------------------------- 52.0 89.3 (Z) (Z) (Z) 9.7 13.3 16.4 (Z) (Z) (Z)

Station wagon 18.8 -------------------------------------------- 19.8 –4.7 (Z) (Z) (Z) 26.6 24.3 36.1 (Z) (Z) (Z)

Multistop or stepvan 1 ------------------------------------- 3.3 6.4 –48.2 3.3 6.4 –48.2 15.5 31.2 34.9 15.5 31.2 34.9

Platform with added devices 8.3 ------------------------------- 6.5 27.8 8.3 6.5 27.8 12.5 13.1 18.1 12.5 13.1 18.1

Low boy or depressed center 2.5 ------------------------------ 3.9 –34.0 2.5 3.9 –34.0 12.3 13.9 18.6 12.3 13.9 18.6

Basic platform 32.3 -------------------------------------------- 30.0 7.6 32.3 30.0 7.6 5.4 5.4 7.6 5.4 5.4 7.6

Livestock truck 1.4 ------------------------------------------- 2.5 –42.2 1.4 2.5 –42.2 27.0 21.4 34.4 27.0 21.4 34.4

Insulated nonrefrigerated van .6 ------------------------------ (S) (S) .6 (S) (S) 45.4 (S) (S) 45.4 (S) (S)

Insulated refrigerated van 4.2 --------------------------------- 2.2 93.6 4.2 2.2 93.6 12.3 16.9 20.9 12.3 16.9 20.9

Drop-frame van .7 ------------------------------------------ (S) (S) .7 (S) (S) 39.9 (S) (S) 39.9 (S) (S)

Open-top van (S) -------------------------------------------- (Z) (Z) (S) (Z) (Z) (S) (Z) (Z) (S) (Z) (Z) Basic enclosed van 14.1 --------------------------------------- 9.5 48.2 14.1 9.5 48.2 6.5 16.6 17.8 6.5 16.6 17.8

Beverage .6 ------------------------------------------------ 2.1 –71.3 .6 2.1 –71.3 32.8 23.0 40.1 32.8 23.0 40.1 Public utility 2.7 ---------------------------------------------- 1.9 38.2 2.7 1.9 38.2 24.0 27.4 36.4 24.0 27.4 36.4 Winch or crane 2.1 ------------------------------------------- 1.6 30.8 2.1 1.6 30.8 24.0 25.1 34.8 24.0 25.1 34.8 Wrecker 4.5 ------------------------------------------------- (S) (S) 4.5 (S) (S) 46.9 (S) (S) 46.9 (S) (S)

Pole or logging .2 ------------------------------------------- (S) (S) .2 (S) (S) 34.7 (S) (S) 34.7 (S) (S)

Auto transport .8 -------------------------------------------- .8 –.6 .8 .8 –.6 18.7 20.7 27.9 18.7 20.7 27.9 Service truck 1.8 --------------------------------------------- 2.3 –21.4 1.8 2.3 –21.4 28.7 25.4 38.3 28.7 25.4 38.3 Yard tractor .2 ---------------------------------------------- (S) (S) .2 (S) (S) 37.1 (S) (S) 37.1 (S) (S)

Oilfield truck 2.8 --------------------------------------------- 4.2 –33.5 2.8 4.2 –33.5 16.1 14.8 21.9 16.1 14.8 21.9 Grain body 12.7 ----------------------------------------------- 9.4 35.5 12.7 9.4 35.5 9.5 10.6 14.2 9.5 10.6 14.2

Garbage hauler 1.0 ------------------------------------------- (S) (S) 1.0 (S) (S) 36.9 (S) (S) 36.9 (S) (S)

Dump truck 8.1 ---------------------------------------------- 9.2 –12.0 8.1 9.2 –12.0 10.7 9.9 14.6 10.7 9.9 14.6 Tank truck (liquids or gases) 6.9 ------------------------------- 5.6 23.7 6.9 5.6 23.7 11.7 12.4 17.0 11.7 12.4 17.0 Tank truck (dry bulk) .7 -------------------------------------- .8 –11.5 .7 .8 –11.5 29.5 28.4 40.9 29.5 28.4 40.9 Concrete mixer 1.1 ------------------------------------------- 1.2 –3.9 1.1 1.2 –3.9 26.6 19.0 32.7 26.6 19.0 32.7 Other .8 --------------------------------------------------- (S) (S) .8 (S) (S) 27.2 (S) (S) 27.2 (S) (S)

Not reported (Z) --------------------------------------------- (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z)

ANNUAL MILES

Less than 5,000 291.7 ------------------------------------------ 247.9 17.7 47.5 44.4 7.0 5.6 5.7 8.0 5.0 3.9 6.3 5,000 to 9,999 209.7 ------------------------------------------- 208.9 .4 15.2 14.8 3.3 7.2 6.7 9.8 12.6 8.5 15.1 10,000 to 19,999 355.3 ----------------------------------------- 296.0 20.1 14.8 17.4 –15.3 5.0 5.3 7.3 8.5 10.5 13.5 20,000 to 29,999 125.6 ----------------------------------------- 87.2 44.0 12.0 8.9 35.0 9.6 11.2 14.8 8.7 17.9 19.9 30,000 to 49,999 63.5 ----------------------------------------- 39.9 58.9 9.8 6.6 47.5 13.6 16.4 21.3 9.0 11.2 14.3

50,000 to 74,999 20.6 ----------------------------------------- 13.4 53.8 6.1 4.1 48.4 22.3 26.3 34.5 9.2 11.3 14.6

75,000 or more 13.8 ------------------------------------------- 10.4 32.5 9.4 7.7 21.6 18.5 22.6 29.2 5.2 18.4 19.1

PRIMARY RANGE OF OPERATION

Local 730.9 ---------------------------------------------------- 680.7 7.4 53.5 60.7 –11.8 2.4 2.1 3.2 4.5 4.2 6.1

Total short-range1 ---------------------------------------- 165.2 111.9 47.6 19.0 15.2 24.7 8.1 9.5 12.5 6.5 7.2 9.7

Short-range1 ------------------------------------------- 137.1 (NA) (NA) 12.6 (NA) (NA) 9.2 (NA) (NA) 8.7 (NA) (NA)

Short-range medium1 ----------------------------------- 28.1 (NA) (NA) 6.4 (NA) (NA) 19.9 (NA) (NA) 10.1 (NA) (NA)

Total long-range1 ----------------------------------------- 50.9 42.3 20.5 17.6 10.3 70.3 13.5 15.4 20.5 4.2 14.5 15.1

Long-range medium1------------------------------------ 25.1 (NA) (NA) 4.8 (NA) (NA) 21.4 (NA) (NA) 9.9 (NA) (NA)

Long-range1 ------------------------------------------- 25.8 (NA) (NA) 12.8 (NA) (NA) 16.9 (NA) (NA) 4.8 (NA) (NA)

Off-the-road 105.4 ---------------------------------------------- 64.2 64.2 17.7 14.5 22.0 10.3 12.3 16.1 11.1 8.2 13.8 Not reported 27.7 --------------------------------------------- (S) (S) 7.1 (S) (S) 19.7 (S) (S) 12.6 (S) (S)

See footnotes at end of table.

TRANSPORTATIONmTRUCK INVENTORY AND USE SURVEY OKLAHOMAnnOK–9
TIPS [UPF] S_CASTILLO [SPECPROJ,S_CASTILLO SPECPROJ 10/21/94 7:37 AM MACHINE: EPCV24 DATA:TIPS_DATA.DAT;195 10/21/94 07:36:00 TAPE: NOreel FRAME: 3

TSF:TIPS92-07362546.DAT;1 10/21/94 07:36:33 UTF:TIPS93-07362546.DAT;1 10/21/94 07:36:33 META:TIPS96-07362546.DAT;1 10/21/94 07:36:59

Table 2. TrucksmComparative Vehicular and Operational Characteristics: 1992 and

1987mCon.

[Data relate to State of registration. Detail may not add to total because of rounding. For meaning of abbreviations and symbols, see introductory text]

Vehicular and operational

characteristics

All trucks Trucks, excluding pickups, panels, vans,

utilities, and station wagons

Relative standard error of estimate

(percent) for column m

1992 trucks

(thousands)

1987 trucks

(thousands)

Percent

change

1992 to

1987

1992 trucks

(thousands)

1987 trucks

(thousands)

Percent

change

1992 to

1987

A B C D E F A B C D E F

WEEKS OPERATED1

Less than 1 62.5 ---------------------------------------------- (NA) (NA) 12.1 (NA) (NA) 13.3 (NA) (NA) 9.5 (NA) (NA)

1 to 4 50.8 --------------------------------------------------- (NA) (NA) 13.3 (NA) (NA) 14.5 (NA) (NA) 14.0 (NA) (NA)

5 to 8 45.5 --------------------------------------------------- (NA) (NA) 10.5 (NA) (NA) 15.5 (NA) (NA) 11.0 (NA) (NA)

9 to 12 23.1 -------------------------------------------------- (NA) (NA) 4.2 (NA) (NA) 22.6 (NA) (NA) 16.5 (NA) (NA)

13 to 16 14.4 ------------------------------------------------- (NA) (NA) 3.7 (NA) (NA) 27.1 (NA) (NA) 18.2 (NA) (NA)

17 to 20 21.5 ------------------------------------------------- (NA) (NA) 8.0 (NA) (NA) 20.4 (NA) (NA) 9.2 (NA) (NA)

21 to 24 24.3 ------------------------------------------------- (NA) (NA) 3.9 (NA) (NA) 22.2 (NA) (NA) 16.8 (NA) (NA)

25 to 28 42.8 ------------------------------------------------- (NA) (NA) 5.0 (NA) (NA) 17.0 (NA) (NA) 14.5 (NA) (NA)

29 to 32 21.6 ------------------------------------------------- (NA) (NA) 2.6 (NA) (NA) 24.1 (NA) (NA) 21.5 (NA) (NA)

33 to 36 30.9 ------------------------------------------------- (NA) (NA) 3.1 (NA) (NA) 20.2 (NA) (NA) 18.1 (NA) (NA)

37 to 40 17.8 ------------------------------------------------- (NA) (NA) 1.9 (NA) (NA) 26.8 (NA) (NA) 18.6 (NA) (NA) 41 to 44 16.6 ------------------------------------------------- (NA) (NA) 5.1 (NA) (NA) 26.2 (NA) (NA) 30.7 (NA) (NA) 45 to 48 75.1 ------------------------------------------------- (NA) (NA) 5.4 (NA) (NA) 12.9 (NA) (NA) 12.5 (NA) (NA) 49 to 52 621.0 ------------------------------------------------- (NA) (NA) 34.8 (NA) (NA) 3.0 (NA) (NA) 4.8 (NA) (NA)

Not reported 12.1 --------------------------------------------- (NA) (NA) 1.3 (NA) (NA) 31.7 (NA) (NA) 20.4 (NA) (NA)

BASE OF OPERATION

Percentage of miles traveled outside base-of-operation State:

Less than 25 percent 889.5 ----------------------------------- 671.7 32.4 80.2 77.2 3.8 1.7 2.2 2.7 3.4 2.7 4.3 25 to 49 percent 45.9 --------------------------------------- 30.7 49.3 2.5 2.8 –9.8 16.9 19.5 25.8 13.4 15.2 20.3 50 to 74 percent 16.7 --------------------------------------- 32.5 –48.8 3.6 3.4 7.3 26.0 18.8 32.1 12.0 12.3 17.2 75 to 100 percent 21.5 -------------------------------------- 41.6 –48.4 7.0 7.0 –.2 21.4 16.5 27.0 8.8 27.5 28.9 No home base 1 ---------------------------------------- 7.5 (NA) (NA) 7.5 (NA) (NA) 6.6 (NA) (NA) 6.6 (NA) (NA)

Not reported 99.0 ------------------------------------------- 127.1 –22.1 14.1 13.6 3.4 10.7 9.0 13.9 8.6 8.7 12.2

VEHICLE SIZE

Light 974.6 ---------------------------------------------------- 829.5 17.5 27.7 33.8 –18.2 .8 .6 1.0 9.5 7.3 12.0 Medium 44.1 ------------------------------------------------- 23.2 90.1 25.8 20.5 25.9 11.9 10.2 15.7 6.1 7.1 9.4 Light-heavy 18.0 ---------------------------------------------- 15.2 18.8 18.0 13.8 29.9 8.0 11.8 14.3 8.0 8.7 11.8 Heavy-heavy 43.4 --------------------------------------------- 35.9 21.0 43.4 35.8 21.2 3.2 4.8 5.8 3.2 4.8 5.8

AVERAGE WEIGHT (POUNDS)

Less than 6,001 845.9 ------------------------------------------ 763.7 10.8 11.8 10.9 8.0 1.6 1.1 2.0 19.7 19.4 27.7

6,001 to 10,000 128.7 ------------------------------------------ 65.7 95.8 15.9 22.9 –30.7 9.4 11.4 14.7 8.9 6.7 11.2

10,001 to 14,000 25.4 ----------------------------------------- 9.6 163.9 11.7 8.3 41.0 17.6 17.4 24.7 9.8 12.2 15.7

14,001 to 16,000 9.2 ----------------------------------------- 8.2 12.3 6.1 6.8 –11.2 24.5 19.9 31.6 15.0 13.7 20.3

16,001 to 19,500 9.5 ----------------------------------------- 5.4 76.4 8.1 5.4 49.6 17.9 15.0 23.4 11.1 15.0 18.7

19,501 to 26,000 18.0 ----------------------------------------- 15.2 18.8 18.0 13.8 29.9 8.0 11.8 14.3 8.0 8.7 11.8 26,001 to 33,000 7.8 ----------------------------------------- 6.8 14.6 7.8 6.8 14.6 12.2 11.1 16.5 12.2 11.1 16.5 33,001 to 40,000 4.9 ----------------------------------------- 3.8 28.6 4.9 3.8 29.8 14.6 13.8 20.1 14.6 13.9 20.2 40,001 to 50,000 7.8 ----------------------------------------- 5.7 35.4 7.8 5.7 35.4 9.2 11.5 14.7 9.2 11.5 14.7 50,001 to 60,000 4.9 ----------------------------------------- 3.7 32.0 4.9 3.7 32.0 8.9 11.3 14.4 8.9 11.3 14.4

60,001 to 80,000 17.0 ----------------------------------------- 14.8 15.0 17.0 14.8 15.0 3.3 9.7 10.2 3.3 9.7 10.2

80,001 to 100,000 1.1 ---------------------------------------- 1.0 7.2 1.1 1.0 7.2 25.1 18.8 31.4 25.1 18.8 31.4

100,001 to 130,000 (Z) --------------------------------------- (S) (S) (Z) (S) (S) (Z) (S) (S) (Z) (S) (S)

130,001 or more (Z) ----------------------------------------- (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z)

Not reported (Z) --------------------------------------------- (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z)

TOTAL LENGTH (FEET)

Less than 20.0 1 ------------------------------------------ 971.3 806.4 20.4 27.0 25.3 6.9 .9 .8 1.2 9.6 9.5 13.5

20.0 to 27.9 46.6 ---------------------------------------------- 40.5 15.1 44.6 40.5 10.3 5.1 4.2 6.6 4.2 4.2 6.0

28.0 to 35.9 30.9 ---------------------------------------------- 19.3 59.7 12.0 14.0 –14.2 17.1 14.9 22.7 8.9 8.2 12.1

36.0 to 40.9 4.0 ---------------------------------------------- 9.7 –58.9 3.8 3.0 25.3 15.3 31.0 34.6 15.4 16.9 22.8

41.0 to 44.9 1.7 ---------------------------------------------- .9 83.0 1.7 .9 83.0 18.8 36.9 41.4 18.8 36.9 41.4

45.0 or more 25.7 --------------------------------------------- 26.9 –4.4 25.7 20.3 26.9 2.9 12.2 12.6 2.9 7.2 7.8

Not reported (Z) --------------------------------------------- (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z)

YEAR MODEL

1993 6.6 ---------------------------------------------------- (NA) (NA) 1.9 (NA) (NA) 38.7 (NA) (NA) 18.2 (NA) (NA)

1992 39.4 ---------------------------------------------------- (NA) (NA) 4.3 (NA) (NA) 17.7 (NA) (NA) 12.4 (NA) (NA)

1991 111.4 ---------------------------------------------------- (NA) (NA) 6.6 (NA) (NA) 10.4 (NA) (NA) 11.2 (NA) (NA)

1990 67.2 ---------------------------------------------------- (NA) (NA) 4.9 (NA) (NA) 13.7 (NA) (NA) 12.8 (NA) (NA)

1989 76.6 ---------------------------------------------------- (NA) (NA) 5.3 (NA) (NA) 12.8 (NA) (NA) 13.0 (NA) (NA)

1988 57.0 ---------------------------------------------------- (S) (S) 4.6 (S) (S) 14.8 (S) (S) 14.4 (S) (S) 1987 46.3 ---------------------------------------------------- 29.3 57.7 2.7 1.5 76.2 16.8 20.4 26.4 19.6 20.1 28.1 1986 54.1 ---------------------------------------------------- 66.5 –18.6 3.5 2.7 28.5 15.4 13.3 20.3 16.6 19.1 25.3 1985 61.6 ---------------------------------------------------- 67.4 –8.6 3.4 5.2 –33.9 14.5 13.1 19.5 17.6 28.3 33.3 1984 54.5 ---------------------------------------------------- 52.5 3.8 3.9 3.5 9.3 15.4 14.9 21.4 15.2 16.0 22.0

1983 37.0 ---------------------------------------------------- 47.0 –21.2 2.1 2.0 7.6 18.9 16.0 24.8 23.4 23.1 32.9

Pre-1983 468.4 ------------------------------------------------ 651.4 –28.1 71.6 89.0 –19.5 3.9 2.3 4.5 3.9 2.6 4.7 Not reported (Z) --------------------------------------------- (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z)

See footnotes at end of table.

OK–10nnOKLAHOMA TRANSPORTATIONmTRUCK INVENTORY AND USE SURVEY
TIPS [UPF] S_CASTILLO [SPECPROJ,S_CASTILLO SPECPROJ 10/21/94 7:37 AM MACHINE: EPCV24 DATA:TIPS_DATA.DAT;195 10/21/94 07:36:00 TAPE: NOreel FRAME: 4

TSF:TIPS92-07362546.DAT;1 10/21/94 07:36:33 UTF:TIPS93-07362546.DAT;1 10/21/94 07:36:33 META:TIPS96-07362546.DAT;1 10/21/94 07:36:59

Table 2. TrucksmComparative Vehicular and Operational Characteristics: 1992 and

1987mCon.

[Data relate to State of registration. Detail may not add to total because of rounding. For meaning of abbreviations and symbols, see introductory text]

Vehicular and operational

characteristics

All trucks Trucks, excluding pickups, panels, vans,

utilities, and station wagons

Relative standard error of estimate

(percent) for column m

1992 trucks

(thousands)

1987 trucks

(thousands)

Percent

change

1992 to

1987

1992 trucks

(thousands)

1987 trucks

(thousands)

Percent

change

1992 to

1987

A B C D E F A B C D E F

VEHICLE ACQUISITION

Purchased new 457.1 ------------------------------------------- 350.8 30.3 47.0 36.1 30.0 4.1 4.6 6.1 3.8 4.5 5.9

Purchased used 607.0 ------------------------------------------ 541.8 12.0 64.2 64.8 –.9 3.1 3.0 4.3 4.4 4.4 6.2

Leased from someone else 9.2 -------------------------------- 9.5 –3.4 2.9 1.6 83.6 31.9 34.1 46.7 14.9 24.8 28.9

Other .1 --------------------------------------------------- (NA) (NA) (S) (NA) (NA) 49.1 (NA) (NA) (S) (NA) (NA)

Not reported 6.6 --------------------------------------------- (S) (S) .7 1.5 –54.0 43.8 (S) (S) 41.2 28.1 49.8

LEASE CHARACTERISTICS2 3

Leased without driver 11.6 ------------------------------------- 12.1 –4.6 11.6 5.5 109.6 6.6 25.0 25.9 6.6 13.4 15.0 Leased with driver 1.2 ---------------------------------------- (S) (S) 1.2 (S) (S) 22.3 (S) (S) 22.3 (S) (S)

Leased with owner-operator 2.3 ------------------------------- 6.7 –65.4 2.3 1.4 65.3 17.6 39.7 43.4 17.6 23.5 29.4

Provisions of lease: Financing 1.5 ---------------------------------------------- 7.4 –79.9 1.5 2.2 –30.6 19.5 36.0 41.0 19.5 22.4 29.7

Full maintenance 2.5 --------------------------------------- (S) (S) 2.5 1.4 77.6 19.7 (S) (S) 19.7 18.6 27.0

Maintenance on specific parts (S) --------------------------- (S) (S) (S) (S) (S) (S) (S) (S) (S) (S) (S)

Payment of taxes 2.0 --------------------------------------- (S) (S) 2.0 (S) (S) 21.0 (S) (S) 21.0 (S) (S)

Obtaining licenses and permits 2.5 --------------------------- 6.0 –58.3 2.5 2.1 22.1 18.1 38.2 42.3 18.1 14.7 23.3

Record keeping for leased trucks 2.0 ------------------------ 1.2 66.6 2.0 1.2 66.6 21.0 17.2 27.1 21.0 17.2 27.1

Other (S) ------------------------------------------------- (S) (S) (S) (S) (S) (S) (S) (S) (S) (S) (S)

PRIMARY OPERATOR CLASSIFICATION

Not for hire 1 ---------------------------------------------- 060.9 889.5 19.3 98.6 89.8 9.8 .6 .5 .8 2.6 2.5 3.7 Business use 411.4 ------------------------------------------- 310.1 32.7 94.9 84.7 12.0 4.3 4.7 6.4 2.8 1.7 3.2 Personal transportation 628.9 ---------------------------------- 568.6 10.6 3.7 4.9 –24.3 2.9 2.7 3.9 19.1 39.7 44.0 Mixedmbusiness use/personal transportation 20.6 -------------- 10.8 90.7 (Z) (S) (S) 26.1 34.5 43.3 (Z) (S) (S)

For hire 18.1 ------------------------------------------------- 11.7 54.4 15.2 11.7 29.7 12.0 12.8 17.5 4.6 12.8 13.6

Motor carrier 12.6 ------------------------------------------- 7.4 71.0 12.6 7.4 71.0 5.1 8.1 9.6 5.1 8.1 9.6

Owner/operator 2.5 ---------------------------------------- 4.2 –41.0 2.5 4.2 –41.0 13.9 33.2 36.0 13.9 33.2 36.0

Independent 1.5 ----------------------------------------- 3.4 –54.6 1.5 3.4 –54.6 19.9 40.8 45.4 19.9 40.8 45.4

Leased to a company .9 --------------------------------- .8 16.3 .9 .8 16.3 17.2 20.8 27.0 17.2 20.8 27.0

Not reported (S) ------------------------------------------- .2 (S) (S) .2 (S) (S) 49.6 (S) (S) 49.6 (S)

Daily rental 1.0 ---------------------------------------------- 2.4 –56.4 1.0 2.4 –56.4 16.2 24.1 29.0 16.2 24.1 29.0

Mixedmnot for hire/for hire (Z) -------------------------------- (S) (S) (Z) (S) (S) (Z) (S) (S) (Z) (S) (S)

For-hire jurisdiction:

Interstate 9.9 ---------------------------------------------- 7.1 38.5 9.9 7.1 38.5 5.0 19.7 20.3 5.0 19.7 20.3 Intrastate 2.8 ---------------------------------------------- 2.7 3.4 2.8 2.7 3.4 12.7 14.5 19.3 12.7 14.5 19.3 Local 1.6 -------------------------------------------------- 1.8 –12.5 1.6 1.8 –12.5 23.3 23.4 33.0 23.3 23.4 33.0 Not reported .9 ------------------------------------------- (S) (S) .9 (S) (S) 24.3 (S) (S) 24.3 (S) (S)

Type of carrier (interstate only):

Contract 3.8 ----------------------------------------------- (S) (S) 3.8 (S) (S) 8.2 (S) (S) 8.2 (S) (S)

Common 5.7 ---------------------------------------------- 4.1 38.4 5.7 4.1 38.4 7.2 8.6 11.2 7.2 8.6 11.2

Exempt .3 ------------------------------------------------ .4 –21.0 .3 .4 –21.0 29.5 29.7 41.9 29.5 29.7 41.9

Not reported (S) ------------------------------------------- .2 (S) (S) .2 (S) (S) 44.3 (S) (S) 44.3 (S)

Kind of service: 1

Truckload 10.9 ---------------------------------------------- (NA) (NA) 10.9 (NA) (NA) 4.7 (NA) (NA) 4.7 (NA) (NA)

Less than truckload 3.3 ------------------------------------- (NA) (NA) 3.3 (NA) (NA) 14.6 (NA) (NA) 14.6 (NA) (NA)

Not reported .9 ------------------------------------------- (NA) (NA) .9 (NA) (NA) 23.7 (NA) (NA) 23.7 (NA) (NA)

PRIMARY PRODUCTS CARRIED

Farm products 44.0 ------------------------------------------- 51.7 –14.9 20.3 23.8 –15.0 13.4 11.9 17.9 7.3 6.2 9.5

Live animals 47.3 --------------------------------------------- 19.5 142.6 6.0 4.4 34.0 16.0 22.6 27.7 14.6 15.9 21.6

Animal feed1 --------------------------------------------- 31.9 (NA) (NA) 5.2 (NA) (NA) 19.2 (NA) (NA) 15.8 (NA) (NA)

Mining products 6.4 ------------------------------------------ (S) (S) .6 .5 19.3 45.3 (S) (S) 32.8 26.1 41.9

Logs and other forest products (S) ---------------------------- 1.1 (S) .7 1.1 –39.2 (S) 31.1 (S) 37.1 31.0 48.3

Lumber and fabricated wood products 17.2 ---------------------- (S) (S) 2.5 1.2 116.8 26.6 (S) (S) 21.4 29.8 36.7

Processed foods 19.6 ----------------------------------------- 9.6 104.8 6.1 6.9 –12.1 22.4 25.2 33.7 11.5 22.1 24.9

Textile mill products (S) -------------------------------------- (S) (S) .2 (S) (S) (S) (S) (S) 34.7 (S) (S)

Building materials 29.6 ----------------------------------------- 14.4 106.4 9.0 10.3 –12.7 18.4 17.3 25.3 10.1 9.4 13.8

Household goods .9 ----------------------------------------- 4.3 –79.0 .9 3.0 –69.2 34.4 33.9 48.3 34.4 21.5 40.6

Furniture or hardware 4.8 ------------------------------------- (S) (S) 4.8 .7 571.4 9.2 (S) (S) 9.2 40.7 41.8

Paper products 5.4 ------------------------------------------- (S) (S) 1.1 .4 165.7 46.2 (S) (S) 16.0 29.7 33.7

Chemicals 9.0 ----------------------------------------------- 10.5 –14.7 3.2 3.9 –18.4 32.8 28.7 43.6 18.8 16.0 24.7

Petroleum 8.4 ----------------------------------------------- 7.0 21.1 5.4 4.1 30.9 26.1 28.5 38.6 14.6 15.2 21.1

Plastics and/or rubber .3 ------------------------------------ (S) (S) .3 (S) (S) 28.3 (S) (S) 28.3 (S) (S)

Primary metal products 10.2 ------------------------------------ (S) (S) 3.0 1.0 207.6 32.1 (S) (S) 18.6 28.3 33.9

Fabricated metal products 4.1 --------------------------------- (S) (S) 1.1 1.6 –30.8 49.9 (S) (S) 25.1 25.2 35.6

Machinery 16.3 ----------------------------------------------- 5.0 228.2 4.8 3.7 31.5 24.9 28.8 38.1 13.1 15.0 19.9

Transportation equipment 16.1 --------------------------------- 8.2 97.1 7.4 2.7 174.5 25.7 33.0 41.8 29.0 18.6 34.5

Glass products (S) ------------------------------------------- (S) (S) (S) (S) (S) (S) (S) (S) (S) (S) (S)

Miscellaneous products of manufacturing 10.2 ------------------- (S) (S) 1.5 (S) (S) 34.7 (S) (S) 19.9 (S) (S)

Industrial "waste" water 1 ---------------------------------- .4 .9 –53.8 .4 .9 –53.8 34.5 31.6 46.8 34.5 31.6 46.8

Scrap, refuse, or garbage 4.0 --------------------------------- 2.3 75.6 2.4 2.3 5.6 38.8 23.0 45.1 24.0 23.0 33.2

Mixed cargoes 4.5 ------------------------------------------- 7.6 –40.7 3.1 3.7 –15.6 33.0 30.9 45.1 12.5 15.0 19.5 Craftsman’s equipment 43.8 ------------------------------------ 41.4 5.8 4.4 8.3 –47.4 16.9 15.9 23.2 18.3 12.1 22.0

See footnotes at end of table.

TRANSPORTATIONmTRUCK INVENTORY AND USE SURVEY OKLAHOMAnnOK–11
TIPS [UPF] S_CASTILLO [SPECPROJ,S_CASTILLO SPECPROJ 10/21/94 7:37 AM MACHINE: EPCV24 DATA:TIPS_DATA.DAT;195 10/21/94 07:36:00 TAPE: NOreel FRAME: 5

TSF:TIPS92-07362546.DAT;1 10/21/94 07:36:33 UTF:TIPS93-07362546.DAT;1 10/21/94 07:36:33 META:TIPS96-07362546.DAT;1 10/21/94 07:36:59

Table 2. TrucksmComparative Vehicular and Operational Characteristics: 1992 and

1987mCon.

[Data relate to State of registration. Detail may not add to total because of rounding. For meaning of abbreviations and symbols, see introductory text]

Vehicular and operational

characteristics

All trucks Trucks, excluding pickups, panels, vans,

utilities, and station wagons

Relative standard error of estimate

(percent) for column m

1992 trucks

(thousands)

1987 trucks

(thousands)

Percent

change

1992 to

1987

1992 trucks

(thousands)

1987 trucks

(thousands)

Percent

change

1992 to

1987

A B C D E F A B C D E F

PRIMARY PRODUCTS CARRIEDmCon.

Recyclable products 1 ------------------------------------- .2 (NA) (NA) .2 (NA) (NA) 40.0 (NA) (NA) 40.0 (NA) (NA)

Hazardous waste (EPA manifest) 1 -------------------------- .1 (NA) (NA) .1 (NA) (NA) 43.9 (NA) (NA) 43.9 (NA) (NA)

Hazardous waste (non-EPA manifest) 1 ---------------------- (Z) (NA) (NA) (Z) (NA) (NA) (Z) (NA) (NA) (Z) (NA) (NA)

Personal transportation 616.0 ------------------------------------ 568.5 8.4 2.8 4.8 –42.2 3.0 2.7 4.0 22.2 40.1 45.8

Passengers1 --------------------------------------------- 15.9 (NA) (NA) (Z) (NA) (NA) 29.9 (NA) (NA) (Z) (NA) (NA)

No load carried 63.8 ------------------------------------------- 121.2 –47.4 7.3 8.2 –11.9 13.7 9.4 16.6 12.5 11.5 17.1

Not in use 39.3 ----------------------------------------------- 6.9 470.8 8.1 4.1 99.8 16.8 28.8 33.3 11.8 15.5 19.5

Other 3.2 --------------------------------------------------- (S) (S) 1.7 .9 85.1 46.9 (S) (S) 21.3 36.1 41.9

Not reported (Z) --------------------------------------------- (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z)

HAZARDOUS MATERIALS CARRIED3

Hazmat placard names: 1

Explosives 1.1 (formerly explosive A) (S) ----------------------- (NA) (NA) (S) (NA) (NA) (S) (NA) (NA) (S) (NA) (NA)

Explosives 1.2 (formerly explosive A) (Z) ----------------------- (NA) (NA) (Z) (NA) (NA) (Z) (NA) (NA) (Z) (NA) (NA)

Explosives 1.3 (formerly explosive B) (Z) ----------------------- (NA) (NA) (Z) (NA) (NA) (Z) (NA) (NA) (Z) (NA) (NA)

Explosives 1.4 (formerly dangerous) (S) ------------------------ (NA) (NA) (S) (NA) (NA) (S) (NA) (NA) (S) (NA) (NA)

Explosives 1.5 (formerly blasting agents) (S) -------------------- (S) (S) (S) (S) (S) (S) (S) (S) (S) (S) (S)

Explosives 1.6 (formerly dangerous) .1 ------------------------ (NA) (NA) .1 (NA) (NA) 49.1 (NA) (NA) 49.1 (NA) (NA)

Flammable gas 2.9 ------------------------------------------- (S) (S) 2.9 (S) (S) 20.2 (S) (S) 20.2 (S) (S)

Nonflammable gas 1.2 ---------------------------------------- (S) (S) 1.2 (S) (S) 27.0 (S) (S) 27.0 (S) (S)

Poisonous gas .3 ------------------------------------------- (NA) (NA) .3 (NA) (NA) 28.3 (NA) (NA) 28.3 (NA) (NA)

Flammable 2.8 ----------------------------------------------- 2.2 24.7 2.8 2.2 24.7 13.4 16.7 21.4 13.4 16.7 21.4

Combustible 2.5 --------------------------------------------- 1.0 143.4 2.5 1.0 143.4 18.7 18.9 26.6 18.7 18.9 26.6

Flammable solid .7 ------------------------------------------ (S) (S) .7 (S) (S) 30.5 (S) (S) 30.5 (S) (S)

Spontaneously combustible (formerly flammable solid) (S) -------- (NA) (NA) (S) (NA) (NA) (S) (NA) (NA) (S) (NA) (NA)

Dangerous when wet (formerly flammable solid W) .3 ----------- (NA) (NA) .3 (NA) (NA) 32.7 (NA) (NA) 32.7 (NA) (NA)

Oxidizer .9 ------------------------------------------------- (S) (S) .9 (S) (S) 28.9 (S) (S) 28.9 (S) (S)

Oxygen (S) -------------------------------------------------- (NA) (NA) (S) (NA) (NA) (S) (NA) (NA) (S) (NA) (NA)

Organic peroxide .1 ----------------------------------------- (NA) (NA) .1 (NA) (NA) 49.1 (NA) (NA) 49.1 (NA) (NA)

Poison (formerly poisons A and B, solids, and liquids) .3 -------- (S) (S) .3 (S) (S) 31.0 (S) (S) 31.0 (S) (S)

Keep away from food .1 ------------------------------------- (NA) (NA) .1 (NA) (NA) 43.9 (NA) (NA) 43.9 (NA) (NA)

Radioactive .1 ---------------------------------------------- (S) (S) .1 (S) (S) 43.9 (S) (S) 43.9 (S) (S)

Corrosive 2.2 ------------------------------------------------ .7 218.2 2.2 .7 218.2 14.7 23.2 27.5 14.7 23.2 27.5

Class 9 .2 -------------------------------------------------- (NA) (NA) .2 (NA) (NA) 34.7 (NA) (NA) 34.7 (NA) (NA)

No hazardous materials carried 1 ---------------------------- 047.6 884.2 18.5 91.0 93.8 –3.0 .6 .6 .9 3.0 2.9 4.2 Not reported (S) --------------------------------------------- 15.4 (S) (S) 6.1 (S) (S) 23.4 (S) (S) 14.5 (S)

TRUCK FLEET SIZE1

1 ------------------------------------------------------- 302.8 (S) (S) 18.3 (S) (S) 5.7 (S) (S) 10.8 (S) (S) 2 to 5 246.9 --------------------------------------------------- 277.3 –10.9 33.5 38.9 –14.0 6.3 5.4 8.3 6.7 6.5 9.3 6 to 9 31.3 --------------------------------------------------- (NA) (NA) 10.1 (NA) (NA) 17.5 (NA) (NA) 10.4 (NA) (NA) 10 to 24 24.9 ------------------------------------------------- (NA) (NA) 10.3 (NA) (NA) 18.7 (NA) (NA) 9.6 (NA) (NA) 25 to 99 24.6 ------------------------------------------------- (NA) (NA) 8.5 (NA) (NA) 19.7 (NA) (NA) 10.1 (NA) (NA) 100 or more 28.5 --------------------------------------------- (NA) (NA) 19.5 (NA) (NA) 12.9 (NA) (NA) 5.2 (NA) (NA)

Not reported 420.9 --------------------------------------------- (NA) (NA) 14.6 (NA) (NA) 4.4 (NA) (NA) 8.3 (NA) (NA)

MILES PER GALLON1

Less than 5 13.2 ---------------------------------------------- 14.6 –9.4 13.2 14.6 –9.2 7.6 10.8 13.2 7.6 10.9 13.2 5 to 6.9 36.3 ------------------------------------------------- 35.8 1.4 36.0 34.5 4.4 4.4 5.7 7.1 4.4 4.4 6.2 7 to 8.9 29.2 ------------------------------------------------- 68.0 –57.0 16.8 22.4 –24.8 14.8 11.2 18.5 8.2 6.6 10.6 9 to 10.9 92.9 ------------------------------------------------ (NA) (NA) 16.4 (NA) (NA) 10.9 (NA) (NA) 8.2 (NA) (NA) 11 to 12.9 151.8 ----------------------------------------------- (NA) (NA) 8.5 (NA) (NA) 8.8 (NA) (NA) 19.5 (NA) (NA) 13 to 14.9 146.4 ----------------------------------------------- (NA) (NA) 2.2 (NA) (NA) 9.1 (NA) (NA) 26.5 (NA) (NA) 15 or more 587.8 ---------------------------------------------- 313.0 87.8 4.6 (S) (S) 3.2 5.1 6.0 35.0 (S) (S) 15 to 20.9 448.2 --------------------------------------------- (NA) (NA) 4.4 (NA) (NA) 4.2 (NA) (NA) 36.1 (NA) (NA) 21 to 24.9 96.1 --------------------------------------------- (NA) (NA) (S) (NA) (NA) 11.6 (NA) (NA) (S) (NA) (NA) 25 or more 43.4 -------------------------------------------- (NA) (NA) (Z) (NA) (NA) 17.8 (NA) (NA) (Z) (NA) (NA)

Not reported 22.3 --------------------------------------------- (S) (S) 17.1 (S) (S) 11.2 (S) (S) 7.9 (S) (S)

EQUIPMENT TYPE3 4

Braking system 120.6 ------------------------------------------- 104.0 15.9 112.0 104.0 7.7 .9 2.4 2.6 1.3 2.4 2.7

Hydraulic 28.3 ---------------------------------------------- 29.4 –3.5 28.3 29.4 –3.5 6.1 5.5 8.2 6.1 5.5 8.2

Hydraulic (power) 37.0 --------------------------------------- 33.1 11.9 37.0 33.1 11.9 4.9 5.0 7.0 4.9 5.0 7.0

Air 36.6 ---------------------------------------------------- 30.9 18.5 36.6 30.9 18.5 3.2 3.0 4.4 3.2 3.0 4.4

Other1------------------------------------------------- 1.3 (NA) (NA) 1.3 (NA) (NA) 33.2 (NA) (NA) 33.2 (NA) (NA)

Not reported 17.2 ------------------------------------------- 10.6 62.4 8.6 10.6 –18.6 8.0 23.0 24.3 10.8 23.0 25.4

Antilock brakes 1 3 ---------------------------------------- 228.9 (NA) (NA) 8.0 (NA) (NA) 6.8 (NA) (NA) 10.7 (NA) (NA)

Power steering3 ------------------------------------------ 850.8 402.8 111.2 77.3 (S) (S) 1.8 4.0 4.4 3.1 (S) (S)

Vehicle control aids for handicapped drivers 1 3 -------------- (S) (NA) (NA) (Z) (NA) (NA) (S) (NA) (NA) (Z) (NA) (NA)

Air-conditioning3 ------------------------------------------ 780.0 369.8 110.9 45.7 (S) (S) 2.1 4.4 4.9 4.8 (S) (S) Wheelchair lift 1 3 ----------------------------------------- (S) (NA) (NA) (Z) (NA) (NA) (S) (NA) (NA) (Z) (NA) (NA)

See footnotes at end of table.

OK–12nnOKLAHOMA TRANSPORTATIONmTRUCK INVENTORY AND USE SURVEY
TIPS [UPF] S_CASTILLO [SPECPROJ,S_CASTILLO SPECPROJ 10/21/94 7:37 AM MACHINE: EPCV24 DATA:TIPS_DATA.DAT;195 10/21/94 07:36:00 TAPE: NOreel FRAME: 6

TSF:TIPS92-07362546.DAT;1 10/21/94 07:36:33 UTF:TIPS93-07362546.DAT;1 10/21/94 07:36:33 META:TIPS96-07362546.DAT;1 10/21/94 07:36:59

Table 2. TrucksmComparative Vehicular and Operational Characteristics: 1992 and

1987mCon.

[Data relate to State of registration. Detail may not add to total because of rounding. For meaning of abbreviations and symbols, see introductory text]

Vehicular and operational

characteristics

All trucks Trucks, excluding pickups, panels, vans,

utilities, and station wagons

Relative standard error of estimate

(percent) for column m

1992 trucks

(thousands)

1987 trucks

(thousands)

Percent

change

1992 to

1987

1992 trucks

(thousands)

1987 trucks

(thousands)

Percent

change

1992 to

1987

A B C D E F A B C D E F

EQUIPMENT TYPE3 4mCon.

Engine retarder3 ------------------------------------------ 9.9 (S) (S) 9.9 (S) (S) 6.3 (S) (S) 6.3 (S) (S)

Reflective materials 3 -------------------------------------- 12.2 3.0 311.3 12.2 3.0 311.3 7.9 20.5 22.0 7.9 20.5 22.0

Electronic vehicle management system 3 -------------------- 130.5 (Z) (Z) 4.6 (Z) (Z) 9.7 (Z) (Z) 12.7 (Z) (Z)

Electronic vehicle identification device (transponder, etc.) 3 ---- .7 (Z) (Z) .7 (Z) (Z) 29.5 (Z) (Z) 29.5 (Z) (Z)

Trip recorders/on board computer system 1 3 ---------------- 3.7 (S) (S) 3.7 (S) (S) 15.6 (S) (S) 15.6 (S) (S)

Navigational systems3------------------------------------- .7 (Z) (Z) .7 (Z) (Z) 27.3 (Z) (Z) 27.3 (Z) (Z)

FUEL CONSERVATION EQUIPMENT3 4

Aerodynamic features 10.2 ------------------------------------- 5.2 98.1 10.2 5.2 98.1 5.8 13.4 14.6 5.8 13.4 14.6 Axle or drive ratio 22.8 ---------------------------------------- 4.3 436.1 22.8 4.3 436.1 5.3 15.4 16.3 5.3 15.4 16.3 Fuel economy engine 23.9 ------------------------------------- 3.7 549.4 23.9 3.7 549.4 4.3 16.7 17.2 4.3 16.7 17.2 Radial tires 786.4 ---------------------------------------------- 470.9 67.0 58.1 4.9 1 096.3 2.1 3.4 4.0 3.1 47.2 47.3 Road speed governors 23.4 ------------------------------------ (S) (S) 23.4 (S) (S) 5.4 (S) (S) 5.4 (S) (S) Variable fan drives 19.5 ---------------------------------------- (S) (S) 19.5 (S) (S) 5.3 (S) (S) 5.3 (S) (S)

Other fuel conservation devices 5.0 ---------------------------- (S) (S) 5.0 (S) (S) 10.3 (S) (S) 10.3 (S) (S)

MAINTENANCE3

General maintenance performed by m

Owner 629.8 ------------------------------------------------- 588.2 7.1 48.2 56.0 –14.0 2.9 2.7 4.0 5.7 4.6 7.3

Company’s maintenance facilities 83.1 ------------------------ 53.1 56.4 42.7 30.3 40.7 9.2 10.5 14.0 5.0 4.8 6.9

Dealership’s service department 159.1 ------------------------- 97.4 63.3 12.7 6.0 112.2 8.3 10.7 13.5 7.5 13.4 15.3

Leasing company 6.9 --------------------------------------- (S) (S) 1.0 .3 225.2 42.0 (S) (S) 27.5 34.9 44.5

Independent garage 303.2 ------------------------------------ 206.8 46.6 22.3 15.8 41.5 5.6 6.8 8.8 6.3 11.4 13.0

Component distributorship 9.8 ------------------------------- (S) (S) 1.1 1.6 –29.5 36.2 (S) (S) 26.1 19.8 32.7 No one 19.3 ------------------------------------------------ 14.8 30.8 1.7 1.3 26.6 25.8 28.3 38.3 27.9 28.9 40.1 Other 13.4 ------------------------------------------------- (S) (S) .4 (S) (S) 32.3 (S) (S) 48.9 (S) (S)

Not reported 45.7 ------------------------------------------- 61.1 –25.1 10.9 6.2 74.6 15.1 13.5 20.3 9.7 12.9 16.2

Major overhauls performed by m

Owner 136.6 ------------------------------------------------- 165.0 –17.2 12.6 17.3 –26.9 9.2 7.7 12.0 14.4 10.5 17.9

Company’s maintenance facilities 41.4 ------------------------ 31.9 30.1 23.2 19.7 17.8 12.3 13.0 17.9 5.0 6.1 7.9

Dealership’s service department 92.7 ------------------------- 61.7 50.3 17.4 8.7 99.7 10.8 13.1 17.0 6.0 9.9 11.6

Leasing company (S) --------------------------------------- (S) (S) (S) .5 (S) (S) (S) (S) (S) 44.5 (S)

Independent garage 182.6 ------------------------------------ 126.2 44.7 22.3 18.5 20.3 7.7 8.9 11.8 6.2 10.0 11.8

Component distributorship 12.9 ------------------------------- 18.3 –29.4 2.8 2.3 23.2 29.7 24.9 38.7 11.6 16.7 20.3

No one 84.0 ------------------------------------------------ 63.9 31.4 4.4 4.1 6.3 12.3 13.4 18.2 17.3 17.4 24.5

Other (S) ------------------------------------------------- (S) (S) .5 (S) (S) (S) (S) (S) 45.7 (S) (S)

Not reported 559.4 ------------------------------------------- 450.9 24.1 45.9 38.3 19.6 3.4 3.7 5.0 5.2 5.6 7.6

ENGINE TYPE AND SIZE

Engine 1 -------------------------------------------------- 080.1 903.6 19.5 114.9 104.0 10.4 .6 .4 .7 2.2 2.4 3.3 Gasoline 982.5 ----------------------------------------------- 847.3 16.0 55.4 69.1 –19.8 1.0 .8 1.2 5.0 3.3 6.0 Diesel 72.7 ------------------------------------------------- 55.7 30.6 51.1 34.3 49.1 7.7 9.8 12.5 2.8 4.8 5.6 Liquefied gas or other 1 ---------------------------------- 18.3 (S) (S) 3.5 (S) (S) 25.1 (S) (S) 20.8 (S) (S)

Not reported 6.5 ------------------------------------------- (S) (S) 4.9 (S) (S) 25.3 (S) (S) 16.4 (S) (S)

Cylinders5 ----------------------------------------------- 1 080.1 903.6 19.5 114.9 104.0 10.4 .6 .4 .7 2.2 2.4 3.3

4 146.6 ----------------------------------------------------- 93.4 56.8 3.2 (S) (S) 9.1 11.2 14.4 13.0 (S) (S)

6 288.0 ----------------------------------------------------- 169.3 70.1 27.3 27.1 .8 5.5 7.4 9.2 4.2 4.0 5.8

8 552.4 ----------------------------------------------------- 584.0 –5.4 41.2 59.0 –30.2 3.4 2.7 4.3 5.6 4.7 7.3

Other (Z) ------------------------------------------------- (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z)

Not reported 93.1 ------------------------------------------- 56.9 63.7 43.1 (S) (S) 9.0 12.4 15.4 5.1 (S) (S)

Cubic inch displacement 6---------------------------------- 1 073.5 903.0 18.9 110.0 103.4 6.4 .6 .4 .8 2.4 2.4 3.4

Gasoline engines 982.5 --------------------------------------- 847.3 16.0 55.4 69.1 –19.8 1.0 .8 1.2 5.0 3.3 6.0

Less than 200 215.8 ---------------------------------------- 126.1 71.2 .2 (S) (S) 7.2 9.4 11.9 34.7 (S) (S)

200 to 299 125.1 ------------------------------------------- 92.8 34.8 .8 7.0 –88.3 9.6 10.8 14.5 44.4 12.3 46.1

300 to 349 229.9 ------------------------------------------- 225.6 1.9 1.2 10.6 –88.8 6.9 6.4 9.5 34.1 16.2 37.8

350 to 399 249.2 ------------------------------------------- 288.2 –13.5 13.7 30.7 –55.5 6.5 5.3 8.4 14.2 6.8 15.7

400 or more 62.7 ----------------------------------------- 85.9 –27.0 9.8 11.2 –13.1 13.4 11.0 17.3 11.8 10.3 15.7

Not reported 99.8 ----------------------------------------- (S) (S) 29.7 (S) (S) 9.8 (S) (S) 7.5 (S) (S)

Diesel engines 72.7 ----------------------------------------- 55.7 30.6 51.1 34.3 49.1 7.7 9.8 12.5 2.8 4.8 5.6 Less than 400 23.6 ---------------------------------------- 10.5 123.9 7.5 2.4 207.9 20.4 31.1 37.2 10.3 21.1 23.5 400 to 599 14.6 ------------------------------------------- 20.7 –29.7 9.2 7.5 23.5 18.8 20.3 27.6 11.2 9.4 14.6 600 to 799 5.7 ------------------------------------------- 5.6 .6 5.7 5.6 .6 8.0 8.5 11.7 8.0 8.5 11.7

800 or more 11.9 ----------------------------------------- 13.7 –13.1 11.9 13.6 –13.1 4.4 3.8 5.8 4.4 3.8 5.8

Not reported 16.9 ----------------------------------------- (S) (S) 16.8 (S) (S) 5.3 (S) (S) 5.4 (S) (S)

Other engines 18.3 ------------------------------------------ (Z) (Z) 3.5 (Z) (Z) 25.1 (Z) (Z) 20.8 (Z) (Z)

Less than 400 5.8 ---------------------------------------- (S) (S) 1.5 (S) (S) 43.8 (S) (S) 32.9 (S) (S)

400 or more 7.9 ----------------------------------------- (S) (S) (S) (S) (S) 41.0 (S) (S) (S) (S) (S)

Not reported 1 ---------------------------------------- 4.6 (S) (S) 1.6 (S) (S) 45.6 (S) (S) 31.3 (S) (S)

REFUELING LOCATION1

Central company-owned fueling facility 25.0 ---------------------- (NA) (NA) 25.0 (NA) (NA) 5.6 (NA) (NA) 5.6 (NA) (NA)

Single contract fueling facility located off-site 4.2 ---------------- (NA) (NA) 4.2 (NA) (NA) 15.9 (NA) (NA) 15.9 (NA) (NA)

Public fueling stations 66.0 ------------------------------------- (NA) (NA) 66.0 (NA) (NA) 2.9 (NA) (NA) 2.9 (NA) (NA)

Other 4.3 --------------------------------------------------- (NA) (NA) 4.3 (NA) (NA) 17.0 (NA) (NA) 17.0 (NA) (NA)

Not reported 21.1 --------------------------------------------- (NA) (NA) 12.5 (NA) (NA) 7.1 (NA) (NA) 9.1 (NA) (NA)

See footnotes at end of table.

TRANSPORTATIONmTRUCK INVENTORY AND USE SURVEY OKLAHOMAnnOK–13
TIPS [UPF] S_CASTILLO [SPECPROJ,S_CASTILLO SPECPROJ 10/21/94 7:37 AM MACHINE: EPCV24 DATA:TIPS_DATA.DAT;195 10/21/94 07:36:00 TAPE: NOreel FRAME: 7

TSF:TIPS92-07362546.DAT;1 10/21/94 07:36:33 UTF:TIPS93-07362546.DAT;1 10/21/94 07:36:33 META:TIPS96-07362546.DAT;1 10/21/94 07:36:59

Table 2. TrucksmComparative Vehicular and Operational Characteristics: 1992 and

1987mCon.

[Data relate to State of registration. Detail may not add to total because of rounding. For meaning of abbreviations and symbols, see introductory text]

Vehicular and operational

characteristics

All trucks Trucks, excluding pickups, panels, vans,

utilities, and station wagons

Relative standard error of estimate

(percent) for column m

1992 trucks

(thousands)

1987 trucks

(thousands)

Percent

change

1992 to

1987

1992 trucks

(thousands)

1987 trucks

(thousands)

Percent

change

1992 to

1987

A B C D E F A B C D E F

TRUCK TYPE AND AXLE ARRANGEMENT

Single-unit trucks 1 ----------------------------------------- 026.6 854.2 20.2 81.9 73.1 12.0 .8 .8 1.1 3.2 3.2 4.6

2 axles 1 ------------------------------------------------ 017.0 844.6 20.4 72.2 63.5 13.7 .8 .8 1.1 3.7 3.8 5.3

3 axles 9.1 ------------------------------------------------ 9.0 1.6 9.1 9.0 1.6 8.9 8.6 12.4 8.9 8.6 12.4

4 axles or more .5 ---------------------------------------- .6 –10.5 .5 .6 –10.5 35.7 35.0 50.0 35.7 35.0 50.0

Combinations 53.4 -------------------------------------------- 49.5 8.0 33.0 30.9 6.7 10.2 10.5 14.7 3.2 5.7 6.6

Single-unit truck with trailer 1.2 ------------------------------ 1.2 2.2 1.2 1.2 2.2 30.9 26.9 41.0 30.9 26.9 41.0

4 axles 1.1 ---------------------------------------------- (S) (S) 1.1 (S) (S) 35.4 (S) (S) 35.4 (S) (S)

5 axles or more .2 -------------------------------------- (S) (S) .2 (S) (S) 40.0 (S) (S) 40.0 (S) (S)

Single-unit truck with utility trailer 24.9 ------------------------- 25.9 –3.6 4.5 7.3 –38.7 21.7 19.3 29.0 16.0 13.3 20.8

3 axles 6.2 ---------------------------------------------- 15.0 –58.8 1.8 1.7 5.8 41.0 27.9 49.6 20.4 29.3 35.7

4 axles 18.2 ---------------------------------------------- 10.2 78.1 2.1 4.9 –57.7 26.3 27.0 37.8 27.0 16.6 31.7

5 axles or more .6 -------------------------------------- (S) (S) .6 (S) (S) 45.2 (S) (S) 45.2 (S) (S)

Truck-tractor with single trailer 26.9 --------------------------- 22.3 20.5 26.9 22.3 20.5 2.6 6.7 7.2 2.6 6.7 7.2

3 axles 1.3 ---------------------------------------------- 2.1 –39.9 1.3 2.1 –39.9 14.8 18.7 23.8 14.8 18.7 23.8

4 axles 4.2 ---------------------------------------------- 4.5 –6.1 4.2 4.5 –6.1 11.3 10.4 15.4 11.3 10.4 15.4

5 axles or more 21.4 -------------------------------------- 15.8 36.1 21.4 15.8 36.1 2.9 9.1 9.6 2.9 9.1 9.6

Truck-tractor with double trailers .4 ------------------------- (S) (S) .4 (S) (S) 48.9 (S) (S) 48.9 (S) (S)

5 axles (S) ---------------------------------------------- (Z) (Z) (S) (Z) (Z) (S) (Z) (Z) (S) (Z) (Z)

6 axles (S) ---------------------------------------------- (S) (S) (S) (S) (S) (S) (S) (S) (S) (S) (S)

7 axles or more (S) -------------------------------------- (Z) (Z) (S) (Z) (Z) (S) (Z) (Z) (S) (Z) (Z)

Truck-tractor with triple trailers (Z) --------------------------- (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z)

7 axles (Z) ---------------------------------------------- (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z)

8 axles or more (Z) -------------------------------------- (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z)

Trailer not specified (Z) ------------------------------------- (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z)

Powered axles 1 ------------------------------------------- 080.1 903.6 19.5 114.9 104.0 10.4 .6 .4 .7 2.2 2.4 3.3

1 852.1 ----------------------------------------------------- 765.8 11.3 81.6 77.6 5.2 1.8 1.5 2.3 3.2 2.9 4.4

2 227.8 ----------------------------------------------------- 137.3 65.9 33.0 25.9 27.5 6.3 8.0 10.2 3.3 6.1 7.0

3 or more (S) ---------------------------------------------- .5 (S) (S) .5 (S) (S) 37.8 (S) (S) 37.8 (S)

Not reported (Z) ------------------------------------------- (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z)

CAB TYPE7

Cab forward of engine 4.9 ------------------------------------ 1.2 323.5 4.9 1.2 323.5 9.1 27.6 29.0 9.1 27.6 29.0

Cab over engine 9.6 ------------------------------------------ 12.5 –23.6 9.6 12.5 –23.6 8.8 7.1 11.3 8.8 7.1 11.3

Conventional cab 88.8 ----------------------------------------- 77.2 15.1 88.8 77.2 15.1 2.0 2.0 2.9 2.0 2.0 2.9

Cab beside engine 1.2 ---------------------------------------- .5 154.1 1.2 .5 154.1 33.5 31.0 45.7 33.5 31.0 45.7

Other .8 --------------------------------------------------- 2.8 –72.3 .8 2.8 –72.3 42.8 22.8 48.5 42.8 22.8 48.5

Not reported 15.3 --------------------------------------------- 9.9 54.9 6.7 9.9 –32.0 8.6 24.5 25.9 12.2 24.5 27.4

PICKUPS, PANELS, VANS, UTILITIES, AND

STATION WAGONS

Total 965.2 ---------------------------------------------------- 799.6 20.7 (Z) (Z) (Z) .7 .6 .9 (Z) (Z) (Z)

Pickups 714.5 ------------------------------------------------ 640.8 11.5 (Z) (Z) (Z) 1.1 .7 1.3 (Z) (Z) (Z) Minivans 67.8 ----------------------------------------------- 18.5 267.1 (Z) (Z) (Z) 12.7 25.3 28.3 (Z) (Z) (Z) Panels or vans 65.7 ----------------------------------------- 68.6 –4.3 (Z) (Z) (Z) 12.8 10.8 16.8 (Z) (Z) (Z) Utilities 98.4 ------------------------------------------------ 52.0 89.3 (Z) (Z) (Z) 9.7 13.3 16.4 (Z) (Z) (Z)

Station wagons 18.8 ----------------------------------------- 19.8 –4.7 (Z) (Z) (Z) 26.6 24.3 36.1 (Z) (Z) (Z)

Driving wheels 965.2 ------------------------------------------- 799.6 20.7 (Z) (Z) (Z) .7 .6 .9 (Z) (Z) (Z) 4-wheel drive 194.8 ------------------------------------------ 111.4 74.9 (Z) (Z) (Z) 7.3 9.8 12.2 (Z) (Z) (Z) 2-wheel drive 770.4 ------------------------------------------ 688.3 11.9 (Z) (Z) (Z) 2.0 1.7 2.6 (Z) (Z) (Z) Front-wheel drive 118.5 ------------------------------------- 17.2 589.5 (Z) (Z) (Z) 10.0 27.3 29.1 (Z) (Z) (Z)

Not reported (Z) ------------------------------------------- (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z) (Z)

1New or modified data line from 1987.

2Lease characteristics include both "leased from" and "leased to" vehicles. Lease provisions apply to a period of 1 year or more.

3Detail does not add to total because items were not applicable or multiple responses were possible.

4Pickups, panels, vans, and minivans were not requested to report the information shown in the Equipment Type section, except for power steering, wheelchair lift, vehicle control aids for

handicapped drivers, electronic vehicle management systems, and air-conditioning. In the Fuel Conservation Equipment section, they reported only radial tires. 5Data were derived from administrative records. "Not reported" indicates those trucks for which the cylinders are unknown.

6Data were derived from administrative records. "Not reported" indicates those trucks for which the cubic inch displacement is unknown.

7Pickups, panels, vans, and minivans are not included.

OK–14nnOKLAHOMA TRANSPORTATIONmTRUCK INVENTORY AND USE SURVEY