South Carolina

Highway Safety Improvement Program

2015 Annual Report

Prepared by: SC
ii

Disclaimer

Protection of Data from Discovery & Admission into Evidence

23 U.S.C. 148(h)(4) states “Notwithstanding any other provision of law, reports, surveys, schedules, 

lists, or data compiled or collected for any purpose relating to this section [HSIP], shall not be 

subject to discovery or admitted into evidence in a Federal or State court proceeding or considered 

for other purposes in any action for damages arising from any occurrence at a location identified or 

addressed in the reports, surveys, schedules, lists, or other data.” 

23 U.S.C. 409 states “Notwithstanding any other provision of law, reports, surveys, schedules, lists, 

or data compiled or collected for the purpose of identifying, evaluating, or planning the safety 

enhancement of potential accident sites, hazardous roadway conditions, or railway-highway 

crossings, pursuant to sections 130, 144, and 148 of this title or for the purpose of developing any 

highway safety construction improvement project which may be implemented utilizing Federal-aid 

highway funds shall not be subject to discovery or admitted into evidence in a Federal or State 

court proceeding or considered for other purposes in any action for damages arising from any 

occurrence at a location mentioned or addressed in such reports, surveys, schedules, lists, or data.”
iii

Table of Contents

Disclaimer...................................................................................................................................................... ii

Executive Summary.......................................................................................................................................1

Introduction ..................................................................................................................................................2

Program Structure ........................................................................................................................................2

Program Administration ...........................................................................................................................2

Program Methodology..............................................................................................................................8

Progress in Implementing Projects.............................................................................................................13

Funds Programmed............................................................................................................................. 13

General Listing of Projects.................................................................................................................. 16

Progress in Achieving Safety Performance Targets....................................................................................32

Overview of General Safety Trends........................................................................................................32

Application of Special Rules....................................................................................................................47

Assessment of the Effectiveness of the Improvements (Program Evaluation) ..........................................49

SHSP Emphasis Areas..............................................................................................................................50

Groups of similar project types...............................................................................................................55

Systemic Treatments...............................................................................................................................60

Project Evaluation...................................................................................................................................66

Glossary.......................................................................................................................................................71
2015 South Carolina Highway Safety Improvement Program

1

Executive Summary

This report provides an overview of SCDOT's administration of the Highway Safety Improvement 

Program (HSIP). SCDOT's HSIP has a primary focus on state-maintained roads since nearly 96 percent of 

fatal crashes and the vast majority of severe crashes occur on the state system. This report covers 

funding obligations from October 1, 2014 to May 31, 2015.
2015 South Carolina Highway Safety Improvement Program

2

Introduction

The Highway Safety Improvement Program (HSIP) is a core Federal-aid program 

with the purpose of achieving a significant reduction in fatalities and serious 

injuries on all public roads. As per 23 U.S.C. 148(h) and 23 CFR 924.15, States are 

required to report annually on the progress being made to advance HSIP 

implementation and evaluation efforts. The format of this report is consistent 

with the HSIP MAP-21 Reporting Guidance dated February 13, 2013 and consists 

of four sections: program structure, progress in implementing HSIP projects, 

progress in achieving safety performance targets, and assessment of the 

effectiveness of the improvements. 

Program Structure

Program Administration

How are Highway Safety Improvement Program funds allocated in a State? 

Central

District

Other

Describe how local roads are addressed as part of Highway Safety Improvement Program.

In South Carolina, the vast majority (~96%) of fatal crashes occur on state-maintained roadways. Due to 

this statistic, our primary focus for safety has been on state-maintained roadways. However, we 

have recently planned for some intersection improvement projects where a local road intersects with a 

state-owned road. Additionally, as our crash data is improving in accessibility and completeness, we will 

incorporate local roads into our safety funding if a viable need is observed. 

It is also worth noting that South Carolina maintains the fifth largest highway system in the nation at 

over 41,000 center-line miles of roadway, despite a land area of roughly 30,000 square miles.
2015 South Carolina Highway Safety Improvement Program

3

Furthermore, 19% of all public roads in the nation are state maintained while South Carolina's public 

roads encompass 63% of its total roadway miles.

Identify which internal partners are involved with Highway Safety Improvement Program planning. 

Design

Planning

Maintenance

Operations

Governors Highway Safety Office

Other: 

Briefly describe coordination with internal partners. 

Several partners within SCDOT and consultants are involved thoughout the process of HSIP planning.

Many of our safety improvements are designed by our Safety Project group within Traffic Engineering 

and they are involved with project design or oversight on all projects to ensure proper designs. Our 

Planning office is consulted during the selection process to determine if any qualifying projects have 

been identified for improvements through other funding sources such as the Metropolitan Planning 

Organizations (MPOs) or Council of Governments (COGs). Our Maintenance office is also contacted to 

ensure that there are no conflicting maintenance activities such as resurfacing or pavement marking 

contracts that involve overlapping work. Operations are monitored through other Traffic Engineering 

offices or consultants to ensure that all projects include consideration of proper traffic operations by 

conducting traffic volume counts, Synchro analysis, signal operations, etc. 

Identify which external partners are involved with Highway Safety Improvement Program planning. 

Metropolitan Planning Organizations

Governors Highway Safety Office

Local Government Association
2015 South Carolina Highway Safety Improvement Program

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Other: 

Identify any program administration practices used to implement the HSIP that have changed since 

the last reporting period.

Multi-disciplinary HSIP steering committee

Other: Other-No changes have been made since the last reporting period

Describe any other aspects of Highway Safety Improvement Program Administration on which you 

would like to elaborate.

Highway Safety Improvement Program Process

Every state is required by the federal government to administer a Highway Safety Improvement Program 

(HSIP). Part 924 of Title 23 of the Code of Federal Regulations (CFR) states, in part:

924.5Policy. “Each state shall develop and implement, on a continuing basis, a highway safety 

improvement program which has the overall objective of reducing the number and severity of accidents 

and decreasing the potential for accidents on all highways.”

924.7 Program Structure. “The highway safety improvement program in each state shall consist of 

components for planning, implementation, and evaluation of safety programs and projects.”

The purpose of the South Carolina HSIP is to establish guidelines for the effective use of available funds, 

to reduce the number and severity of crashes and to decrease the potential for crashes on highways in 

the state. 

The program consists of the following three components: planning, implementation, and evaluation.
2015 South Carolina Highway Safety Improvement Program

5

 

1. PLANNING 

a. Data Management 

In order to locate hazardous locations the following information is essential:

• Crash data – Crash reports are provided by DPS. 

• Traffic data – Traffic volumes are provided by the Traffic Engineering.

• Roadway Data – Road characteristics are provided by the Traffic Engineering.

b. Identify Hazardous Locations

Using the information listed above, potential locations are identified by:

• Recommendations from SCDOT and FHWA personnel.

• Requests from governmental units other than SCDOT and FHWA.

• Requests from citizens. 

• Ongoing research of all fatal crash reports received from DPS.

• Ongoing research of the HSIP database.

The HSIP database has been established to identify, prioritize, and provide guidance for selecting 

potential projects. The information gathered for a location is analyzed using the following methods: 

• Crash Rate – Equates frequency of crashes to traffic volumes (and length of roadway if section). 

A typical crash rate would be expressed in # of crashes per million vehicles entering (if 

intersection) or per one hundred million vehicle miles of travel (if section).

 Severity Rate – A weighted calculation for determining the severity of the crashes. It is based on 

the EPDO (Equivalent Property Damage Only) method from studies performed by the National Safety 

Council and the Traffic Institute at Northwestern University. The severity indices used are listed below: 

(from the Traffic Institute at Northwestern University)

Fatality = 12

Injury = 3

Property Damage Only = 1

• Rate Quality 
2015 South Carolina Highway Safety Improvement Program

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This method entails the calculation of the crash rate at each location and a statistical test to 

determine if that rate is significantly higher than crash rates for other locations with similar 

characteristics.

The critical rate is compared to the actual crash rate for each location. If the actual crash rate exceeds 

the critical rate, then the location may be considered for improvement. 

• Number-Rate 

Combines crash frequency and crash rate methods by first ranking by the number of crashes.

Establishes a frequency threshold and then re-ranks the locations. Based on a crash rate threshold, 

locations with lower crash rates are eliminated. 

c. Conduct Engineering Studies 

Once a potential project location has been identified, the following steps are taken to determine if 

geometric improvements can be implemented that will reduce the volume and severity of the crashes 

reported at the location. 

• Analyze Project Location

Crash reports are obtained and analyzed for locations selected for detailed review. Results from 

analyses along with engineering judgment are used to determine if further investigation is 

needed along with site review.

• Develop Candidate Countermeasures and Project Proposals

Site reviews are conducted to determine characteristics of locations relative to types of crashes 

occurring. Improvements are recommended to address patterns in crashes.

• Establish Project Priorities 

Estimate costs for recommended improvements at each site along with expected reduction in 

crashes for these improvements. Summarize estimated costs and benefits for improvements 

and determine the most cost effective improvement alternative for a location using the Net 

Benefit Method along with engineering judgment.

The net benefit method compares the estimated annual costs of implementing the selected 

countermeasure to the expected annual benefits. The expected annual benefit is calculated 

using the most current “comprehensive costs” of motor vehicle traffic crashes and the 
2015 South Carolina Highway Safety Improvement Program

7

estimated crash reduction percentage expected as a result of implementing the selected 

countermeasure.

Comprehensive costs are a measure of motor vehicle accident costs that include the effects of 

injury on people's entire lives. This is the most useful measure of accident cost since it includes 

all cost components and places a dollar value on each one. Comprehensive life values are 

estimated by examining risk reduction costs from which the market value of safety is inferred. 

The 11 components of the comprehensive cost are: property damage, lost earnings, lost 

household production, medical costs, emergency services, travel delay, vocational 

rehabilitation, workplace costs, administrative, legal, pain, and lost quality of life. 

 

2. IMPLEMENTATION 

Given that the overall charge of the HSIP program is to reduce the number and severity of crashes, it is 

imperative that the implementation phase be carried out in a timely manner. Once the project has been 

approved for funding, it is necessary to design and schedule the project to implement the 

improvements. All HSIP Projects are managed by one of the following offices:

• Preconstruction 

• Traffic Engineering 

• Consultant

Given the appropriate conditions, a Participation Agreement may be arranged with other governmental 

entities. A participation agreement is a contractual partnership between the SCDOT and one or more 

other governmental entities where funding is combined to complete a project. The agreement includes 

the specifying of the roles, responsibilities, and financial obligations of each participant. 

3. EVALUATION 

 To Determine the Effect of Highway Safety Improvements 

Before and After Studies are conducted on all HSIP projects to evaluate the effectiveness of the overall 

program by observed changes in crash number, rate and severity resulting from program 

implementation. The HSIP office conducts studies three years after final inspection of a project. The 

studies include:

• Photographs of existing conditions at the site prior to improvements.

• After a period of no less than 3 years after the completion of the project, crash data and the 

most recent traffic volumes are collected for the location.
2015 South Carolina Highway Safety Improvement Program

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• The data collected before implementing safety improvements is then compared with the data 

collected after the improvements have been completed.

• The information described above is used to calculate the resulting crash rate reduction factor for 

the improved site. The total cost of the project along with the reduction factor is used to 

conduct a Benefit Cost Analysis to determine the overall effectiveness of the project.

• Photographs of the improved conditions are recorded along with all Benefit Cost Analysis. This 

information is used to help with the selection of future projects.

Program Methodology

Select the programs that are administered under the HSIP. 

Median Barrier Intersection Safe Corridor

Horizontal Curve Bicycle Safety Rural State Highways

Skid Hazard Crash Data Red Light Running Prevention

Roadway Departure Low-Cost Spot Improvements Sign Replacement And 

Improvement

Local Safety Pedestrian Safety Right Angle Crash

Left Turn Crash Shoulder Improvement Segments

Other: Other-Safety Program

Program: Other-Safety Program

Date of Program Methodology: 1/1/2015

 

What data types were used in the program methodology? 

Crashes Exposure Roadway

All crashes Traffic Median width
2015 South Carolina Highway Safety Improvement Program

9

Fatal crashes only Volume Horizontal curvature

Fatal and serious injury 

crashes only

Population Functional classification

Other Lane miles Roadside features

Other Other 

What project identification methodology was used for this program? 

Crash frequency

Expected crash frequency with EB adjustment

Equivalent property damage only (EPDO Crash frequency)

EPDO crash frequency with EB adjustment

Relative severity index

Crash rate

Critical rate

Level of service of safety (LOSS)

Excess expected crash frequency using SPFs

Excess expected crash frequency with the EB adjustment

Excess expected crash frequency using method of moments

Probability of specific crash types

Excess proportions of specific crash types

Other 

Are local roads (non-state owned and operated) included or addressed in this program?

Yes

No
2015 South Carolina Highway Safety Improvement Program

10

How are highway safety improvement projects advanced for implementation?

Competitive application process

selection committee

Other 

Select the processes used to prioritize projects for implementation. For the methods selected, indicate 

the relative importance of each process in project prioritization. Enter either the weights or numerical 

rankings. If weights are entered, the sum must equal 100. If ranks are entered, indicate ties by giving 

both processes the same rank and skip the next highest rank (as an example: 1, 2, 2, 4).

Relative Weight in Scoring

Rank of Priority Consideration

Ranking based on B/C 3

Available funding 2

Incremental B/C

Ranking based on net benefit 3

Cost Effectiveness 1

What proportion of highway safety improvement program funds address systemic improvements? 

30

Highway safety improvement program funds are used to address which of the following systemic 

improvements?

Cable Median Barriers Rumble Strips
2015 South Carolina Highway Safety Improvement Program

11

Traffic Control Device Rehabilitation Pavement/Shoulder Widening

Install/Improve Signing Install/Improve Pavement Marking and/or 

Delineation

Upgrade Guard Rails Clear Zone Improvements

Safety Edge Install/Improve Lighting

Add/Upgrade/Modify/Remove Traffic Signal Other 

What process is used to identify potential countermeasures? 

Engineering Study

Road Safety Assessment

Other: 

Identify any program methodology practices used to implement the HSIP that have changed since the 

last reporting period.

Highway Safety Manual

Road Safety audits

Systemic Approach

Other: 
2015 South Carolina Highway Safety Improvement Program

12

Describe any other aspects of the Highway Safety Improvement Program methodology on which you 

would like to elaborate. 

Projects selected for the HSIP have historically been based on one of the following analysis methods: 

1. Crash Rate Method 

2. Rate Quality Control Method 

3. Crash Severity Method 

4. Number Rate Method 

In addition to these methods, the Highway Safety Manual provides additional statistical methods and 

safety performance functions that are also being incorporated in the selection process. 

All of the HSIP projects are selected under the guise of the SCDOT Strategic Highway Safety Plan (SHSP) 

where “Safety” is identified as a top priority for the agency. SCDOT released an update to the SHSP in 

early 2015, which covers the performance period from 2015 to 2018 and includes updated performance 

goals and emphasis areas based on Moving Ahead for Progress in the 21st Century (MAP-21) 

requirements. SCDOT has adopted the Target Zero initiative as the State's main goal in addressing 

traffic-related deaths.

HSIP projects are developed in collaboration with the following emphasis areas identified in the 2015 

SHSP which are: 

1. Roadway Departure 

2. Unrestrained Motor Vehicle Occupants 

3. Age-Related 

4. Speed-Related 

5. Vulnerable Roadway Users 

6. Intersection and Other High-Risk Roadway Locations 

7. Impaired Driving 

8. Commercial Motor Vehicles/ Heavy Trucks 

9. Safety Data Collection, Access, and Analysis 
2015 South Carolina Highway Safety Improvement Program

13

Progress in Implementing Projects

Funds Programmed

Reporting period for Highway Safety Improvement Program funding.

Calendar Year

State Fiscal Year

Federal Fiscal Year

Enter the programmed and obligated funding for each applicable funding category.

Funding Category Programmed* Obligated

HSIP (Section 148) 52313270 73 % 22790697 73 %

HRRRP (SAFETEA-LU) 45715 0 % 54428 0 %

HRRR Special Rule

Penalty Transfer -

Section 154

Penalty Transfer –

Section 164

12000000 17 % 6051868 19 %

Incentive Grants - 

Section 163

Incentive Grants 

(Section 406)

Other Federal-aid 

Funds (i.e. STP, NHPP)

759049 1 % 806998 3 %

State and Local Funds 6381966 9 % 1440286 5 %
2015 South Carolina Highway Safety Improvement Program

14

Totals 71500000 100% 31144277 100%

How much funding is programmed to local (non-state owned and maintained) safety projects? 

$0.00

How much funding is obligated to local safety projects?

$0.00

How much funding is programmed to non-infrastructure safety projects? 

$4,653,465.00

How much funding is obligated to non-infrastructure safety projects?

$4,653,465.00

How much funding was transferred in to the HSIP from other core program areas during the reporting 

period?

$14,000,000.00
2015 South Carolina Highway Safety Improvement Program

15

How much funding was transferred out of the HSIP to other core program areas during the reporting 

period? 

$2,000,000.00

Discuss impediments to obligating Highway Safety Improvement Program funds and plans to 

overcome this in the future.

The obligations shown in the above chart cover a period from October 1, 2014 to May 31, 2015. SCDOT 

currently has advance construction funds on the books to be obligated in June, July, August, and 

September on various safety projects to utilize remaining HSIP allocations. The $14,000,000 in funding 

from question #20 refers to the estimated amount that SCDOT will receive by the end of this Federal 

Fiscal Year (September 30th). This amount is not available as a whole at the beginning of the fiscal year, 

it is provided in portions throughout the year.

Describe any other aspects of the general Highway Safety Improvement Program implementation 

progress on which you would like to elaborate.

None.
2015 South Carolina Highway Safety Improvement Program

16

General Listing of Projects

List each highway safety improvement project obligated during the reporting period. 

Project Improvement Category Outpu

t 

HSIP 

Cost

Total 

Cost

Fundin

g 

Catego

ry

Functiona

l 

Classifica

tion

AAD

T

Spe

ed

Roadwa

y 

Owners

hip

Relationship to 

SHSP

Emphasis 

Area

Strate

gy

US 21 @ SC 

170 & S-761

Access management 

Change in access - close 

or restrict existing 

access

1 

Numb

ers

100000 100000 HSIP 

(Sectio

n 148)

Urban 

Principal 

Arterial -

Other

292

00

0 State 

Highwa

y 

Agency

Intersectio

ns

Target Zero 

Media 

Campaign 

MOA-1-15

Non-infrastructure 

Educational efforts

1 

Numb

ers

1200000 1200000 Penalty 

Transfe

r –

Section 

164

0 0 Engineerin

g, 

enforceme

nt, and 

education

Target Zero 

Campaign 

FY15-16 

TRA-1-15

Non-infrastructure 

Enforcement

1 

Numb

ers

2000000 2000000 Penalty 

Transfe

r –

Section 

164

0 0 Engineerin

g, 

enforceme

nt, and 

education

Richland I-77 

Feasibility 

Study

Non-infrastructure 

Transportation safety 

planning

1 

Numb

ers

50000 50000 HSIP 

(Sectio

n 148)

0 0 Corridor 

Study
2015 South Carolina Highway Safety Improvement Program

17

SC 153 

Feasibility 

Study

Non-infrastructure 

Transportation safety 

planning

1 

Numb

ers

100000 100000 HSIP 

(Sectio

n 148)

0 0 Corridor 

Study

2015-2016 

Road Safety 

Audits

Non-infrastructure Road 

safety audits

1 

Numb

ers

200000 200000 HSIP 

(Sectio

n 148)

0 0 Road 

Safety 

Audit

SC 56 

Feasibility 

Study

Non-infrastructure 

Transportation safety 

planning

1 

Numb

ers

100000 100000 HSIP 

(Sectio

n 148)

0 0 Corridor 

Study

FY 15 Admin 

Safety 

Improvemen

t Program

Non-infrastructure 

Training and workforce 

development

1 

Numb

ers

750000 750000 HSIP 

(Sectio

n 148)

0 0 Employee 

Compensa

tion

S-179 (E 

McIver Road)

Shoulder treatments 

Shoulder treatments -

other

2.93 

Miles

403206.

26

403206.

26

Penalty 

Transfe

r –

Section 

164

Rural 

Major 

Collector

640

0

0 State 

Highwa

y 

Agency

Roadway 

Departure

S-13 (E 

National 

Cemetery 

Rd)

Shoulder treatments 

Shoulder treatments -

other

9.87 

Miles

858066.

33

858066.

33

Penalty 

Transfe

r –

Section 

164

Rural 

Major 

Collector

213

9

0 State 

Highwa

y 

Agency

Roadway 

Departure

S-627 

(Pleasant 

Shoulder treatments 

Shoulder treatments -

6.34 

Miles

1032399

.74

1474856

.77

Penalty 

Transfe

Rural 

Major 

646 0 State 

Highwa

Roadway 

Departure
2015 South Carolina Highway Safety Improvement Program

18

View Dr/ 

Redmond 

Rd)

other r –

Section 

164

Collector y 

Agency

S-60 (Wire 

Rd)

Shoulder treatments 

Shoulder treatments -

other

2.88 

Miles

558196.

03

1116392

.06

Penalty 

Transfe

r –

Section 

164

Rural 

Major 

Collector

350

0

0 State 

Highwa

y 

Agency

Roadway 

Departure

S-47 (White 

Pond Road/ 

Porter Cross 

Road)

Shoulder treatments 

Shoulder treatments -

other

3.9 

Miles

762867.

45

762867.

45

HSIP 

(Sectio

n 148)

Rural 

Major 

Collector

687 0 State 

Highwa

y 

Agency

Roadway 

Departure

S-485 (Three 

and Twenty 

Rd/ St Paul 

Rd)

Shoulder treatments 

Shoulder treatments -

other

6.34 

Miles

1737964

.69

1737964

.69

HSIP 

(Sectio

n 148)

Rural 

Major 

Collector

150

0

0 State 

Highwa

y 

Agency

Roadway 

Departure

SC 9 @ 

Foster Road

Intersection traffic 

control Modify control -

two-way stop to 

roundabout

1 

Numb

ers

50000 50000 HSIP 

(Sectio

n 148)

Rural 

Minor 

Arterial

840

0

0 State 

Highwa

y 

Agency

Intersectio

ns

SC9/S-664 Intersection geometry 

Intersection geometry -

other

1 

Numb

ers

9100 9100 HSIP 

(Sectio

n 148)

Rural 

Principal 

Arterial -

Other

515

0

0 State 

Highwa

y 

Agency

Intersectio

ns
2015 South Carolina Highway Safety Improvement Program

19

SC 9/ Flag 

Patch Road

Intersection geometry 

Intersection geometry -

other

1 

Numb

ers

4400 4400 HSIP 

(Sectio

n 148)

Rural 

Principal 

Arterial -

Other

550

0

0 State 

Highwa

y 

Agency

Intersectio

ns

US 321 

Safety 

Section 

Project

Shoulder treatments 

Shoulder treatments -

other

7 

Miles

23632.8

9

23632.8

9

HSIP 

(Sectio

n 148)

Rural 

Minor 

Arterial

320

0

0 State 

Highwa

y 

Agency

Roadway 

Departure

SC 34 Safety 

Section 

Widening 

Project

Shoulder treatments 

Shoulder treatments -

other

3.36 

Miles

229791.

2

229791.

2

HSIP 

(Sectio

n 148)

Rural 

Minor 

Arterial

490

0

0 State 

Highwa

y 

Agency

Roadway 

Departure

S-29 Safety 

Section 

Widening 

Project

Shoulder treatments 

Shoulder treatments -

other

1.85 

Miles

33672.5

2

33672.5

2

HSIP 

(Sectio

n 148)

Rural 

Major 

Collector

300

0

0 State 

Highwa

y 

Agency

Roadway 

Departure

S-34 S-1848 

AND S-1910 

(PLATT 

SPRGS@KYZ

ER & MCLEE)

Intersection traffic 

control Intersection 

traffic control - other

1 

Numb

ers

100000 100000 HSIP 

(Sectio

n 148)

Urban 

Major 

Collector

585

0

0 State 

Highwa

y 

Agency

Intersectio

ns

US 21 @ S499

Intersection geometry 

Intersection geometrics -

modify skew angle

1 

Numb

ers

19000 19000 HSIP 

(Sectio

n 148)

Rural 

Major 

Collector

542

0

0 State 

Highwa

y 

Agency

Intersectio

ns
2015 South Carolina Highway Safety Improvement Program

20

FY14 STWD 

PE - ADMIN 

HWY SAFETY 

IMPROV 

PROG NONRR

Non-infrastructure 

Training and workforce 

development

1 

Numb

ers

612026.

31

612026.

31

HSIP 

(Sectio

n 148)

0 0 Employee 

Compensa

tion

S- 62 

INTERSEC. 

IMPROVEME

NT

Access management 

Change in access - close 

or restrict existing 

access

1 

Numb

ers

200000 200000 HSIP 

(Sectio

n 148)

Urban 

Minor 

Arterial

415

50

0 State 

Highwa

y 

Agency

Intersectio

ns

S- 146 

WIDENING

Shoulder treatments 

Shoulder treatments -

other

1 

Miles

14000 14000 HRRRP 

(SAFET

EA-LU)

Rural 

Local 

Road or 

Street

168

0

0 State 

Highwa

y 

Agency

Roadway 

Departure

S-272 

SAFETY 

IMPROVEME

NT

Shoulder treatments 

Shoulder treatments -

other

4.06 

Miles

8007.27 8007.27 HRRRP 

(SAFET

EA-LU)

Rural 

Major 

Collector

140

0

0 State 

Highwa

y 

Agency

Roadway 

Departure

S-25/S-522 

Intersection 

Improvemen

t

Intersection traffic 

control Modify control -

all-way stop to 

roundabout

1 

Numb

ers

111878.

8

111878.

8

HSIP 

(Sectio

n 148)

Urban 

Major 

Collector

940

0

0 State 

Highwa

y 

Agency

Intersectio

ns

S- 52 OTHER Roadway Roadway 

widening - add lane(s) 

along segment

1.55 

Miles

175000 175000 HSIP 

(Sectio

n 148)

Rural 

Principal 

Arterial -

182

00

0 State 

Highwa

y 

Section/ 

Corridor
2015 South Carolina Highway Safety Improvement Program

21

Other Agency

SC 3 

INTERSEC. 

IMPROVEME

NT

Intersection traffic 

control Modify control -

two-way stop to 

roundabout

1 

Numb

ers

175000 175000 HSIP 

(Sectio

n 148)

Rural 

Minor 

Arterial

302

5

0 State 

Highwa

y 

Agency

Intersectio

ns

S- 82 

INTERSEC. 

IMPROVEME

NT

Intersection traffic 

control Modify control -

two-way stop to 

roundabout

1 

Numb

ers

114600 114600 HSIP 

(Sectio

n 148)

Urban 

Major 

Collector

105

44

0 State 

Highwa

y 

Agency

Intersectio

ns

US 501 

INTERSEC. 

IMPROVEME

NT

Intersection geometry 

Auxiliary lanes - modify 

left-turn lane offset

1 

Numb

ers

658177.

78

658177.

78

HSIP 

(Sectio

n 148)

Urban 

Principal 

Arterial -

Other

230

50

0 State 

Highwa

y 

Agency

Intersectio

ns

S- 377 

INTERSEC. 

IMPROVEME

NT

Intersection geometry 

Intersection geometrics -

modify skew angle

1 

Numb

ers

175000 175000 HSIP 

(Sectio

n 148)

Urban 

Major 

Collector

144

40

0 State 

Highwa

y 

Agency

Intersectio

ns

FY13 STWD 

PREL. ENGR. 

FOR HAZARD 

ELIM SYS 

(NON-RR)

Non-infrastructure 

Data/traffic records

1 

Numb

ers

691438.

91

691438.

91

HSIP 

(Sectio

n 148)

0 0 Data

SC 414 

WIDENING

Shoulder treatments 

Shoulder treatments -

other

8.42 

Miles

60678.8

2

63622.1

4

HSIP 

(Sectio

n 148)

Rural 

Major 

Collector

144

0

0 State 

Highwa

y 

Roadway 

Departure
2015 South Carolina Highway Safety Improvement Program

22

Agency

CHARLESTO

N SAFETY 

SIGNAL 

UPGRADES

Intersection traffic 

control Modify traffic 

signal -

miscellaneous/other/un

specified

1 

Numb

ers

34574.8

7

34574.8

7

HSIP 

(Sectio

n 148)

Varies 0 0 State 

Highwa

y 

Agency

Intersectio

ns

Rumble 

Stripes - Dist. 

6 2014

Roadway Rumble strips -

edge or shoulder

92.23 

Miles

243523.

07

243523.

07

HSIP 

(Sectio

n 148)

Varies 0 0 State 

Highwa

y 

Agency

Roadway 

Departure

Rumble 

Stripes - Dist. 

5 2014

Roadway Rumble strips -

edge or shoulder

142.67 

Miles

224243.

39

224243.

39

HSIP 

(Sectio

n 148)

Varies 0 0 State 

Highwa

y 

Agency

Roadway 

Departure

Rumble 

Stripes - Dist. 

4 2014

Roadway Rumble strips -

edge or shoulder

72.8 

Miles

153378.

31

153378.

31

HSIP 

(Sectio

n 148)

Varies 0 0 State 

Highwa

y 

Agency

Roadway 

Departure

Rumble 

Stripes - Dist. 

7 2014

Roadway Rumble strips -

edge or shoulder

151.13 

Miles

236517.

59

236517.

59

HSIP 

(Sectio

n 148)

Varies 0 0 State 

Highwa

y 

Agency

Roadway 

Departure

S- 24 

WIDENING

Shoulder treatments 

Shoulder treatments -

2.15 

Miles

1673 1673 HRRRP 

(SAFET

Rural 

Major 

700 0 State 

Highwa

y 

Roadway 

Departure
2015 South Carolina Highway Safety Improvement Program

23

other EA-LU) Collector Agency

VAR SIGNAL 

UPGRADE 

LOCATIONS 

THROUGHOU

T DISTRICT 5

Intersection traffic 

control Modify traffic 

signal -

miscellaneous/other/un

specified

1 

Numb

ers

108963.

72

108963.

72

HSIP 

(Sectio

n 148)

0 0 Intersectio

ns

SC 101 @ S135 

INTERSEC. 

IMPROVEME

NTS

Intersection traffic 

control Modify control -

traffic signal to 

roundabout

1 

Numb

ers

124000 124000 HSIP 

(Sectio

n 148)

Urban 

Major 

Collector

685

0

0 State 

Highwa

y 

Agency

Intersectio

ns

SC 146 @ SC 

417 

INTERSEC. 

IMPROVEME

NTS

Intersection traffic 

control Modify control -

two-way stop to 

roundabout

1 

Numb

ers

209599.

68

209599.

68

HSIP 

(Sectio

n 148)

Urban 

Minor 

Arterial

206

00

0 State 

Highwa

y 

Agency

Intersectio

ns

SC 9 @ S-420 Intersection geometry 

Intersection geometry -

other

1 

Numb

ers

18200 18200 HSIP 

(Sectio

n 148)

Rural 

Principal 

Arterial -

Other

600

0

0 State 

Highwa

y 

Agency

Intersectio

ns

S- 70 

INTERSEC. 

IMPROVEME

NTS

Intersection geometry 

Intersection geometrics -

modify skew angle

1 

Numb

ers

790986.

16

790986.

16

HSIP 

(Sectio

n 148)

Urban 

Major 

Collector

980

0

0 State 

Highwa

y 

Agency

Intersectio

ns

S- 106 

INTERSEC. 

Intersection traffic 

control Modify control -

1 

Numb

981447. 981447. HSIP 

(Sectio

Urban 

Major 

100 0 State 

Highwa

Intersectio
2015 South Carolina Highway Safety Improvement Program

24

IMPROVEME

NTS

two-way stop to 

roundabout

ers 5 5 n 148) Collector 57 y 

Agency

ns

US 21/S-52 

Intersection 

Improvemen

t

Intersection traffic 

control Intersection 

traffic control - other

1 

Numb

ers

200630 200630 HSIP 

(Sectio

n 148)

Urban 

Minor 

Arterial

149

00

0 State 

Highwa

y 

Agency

Intersectio

ns

S- 1274 

INTERSEC. 

IMPROVEME

NTS

Intersection geometry 

Auxiliary lanes - add leftturn lane

1 

Numb

ers

728910.

79

728910.

79

HSIP 

(Sectio

n 148)

Urban 

Major 

Collector

550

0

0 State 

Highwa

y 

Agency

Intersectio

ns

SC 38 

INTERSEC. 

IMPROVEME

NTS

Intersection traffic 

control Modify control -

two-way stop to 

roundabout

1 

Numb

ers

1208224

.76

1208224

.76

HSIP 

(Sectio

n 148)

Urban 

Minor 

Arterial

710

0

0 State 

Highwa

y 

Agency

Intersectio

ns

SC 118/S105 

INTERSEC. 

IMPROVEME

NTS

Intersection geometry 

Auxiliary lanes - add leftturn lane

1 

Numb

ers

37852.2

2

37852.2

2

HSIP 

(Sectio

n 148)

Urban 

Principal 

Arterial -

Other

945

0

0 State 

Highwa

y 

Agency

Intersectio

ns

SC 462 

WIDENING 

RESURFACE

Shoulder treatments 

Shoulder treatments -

other

35.7 

Miles

35826.9

1

35826.9

1

HRRRP 

(SAFET

EA-LU)

Rural 

Minor 

Arterial

322

6

0 State 

Highwa

y 

Agency

Roadway 

Departure

Rumble 

Stripes - Dist. 

Roadway Rumble strips -

edge or shoulder

149.37 

Miles

57181.8

4

57181.8

4

HSIP 

(Sectio

Varies 0 0 State 

Highwa

Roadway 

Departure
2015 South Carolina Highway Safety Improvement Program

25

3 2012 n 148) y 

Agency

Rumble 

Stripes - Dist. 

2 2012

Roadway Rumble strips -

edge or shoulder

144.91 

Miles

50000 50000 HSIP 

(Sectio

n 148)

Varies 0 0 State 

Highwa

y 

Agency

Roadway 

Departure

S- 1041 

OTHER 

SAFETY 

IMPROVEME

NT PROJECT

Shoulder treatments 

Shoulder treatments -

other

0.75 

Miles

25000 25000 HSIP 

(Sectio

n 148)

Urban 

Major 

Collector

350

0

0 State 

Highwa

y 

Agency

Roadway 

Departure

Intersection 

Improvemen

t @ SC 24 & 

SC 59

Intersection geometry 

Intersection geometrics -

modify skew angle

1 

Numb

ers

1319288

.76

1319288

.76

HSIP 

(Sectio

n 148)

Rural 

Minor 

Arterial

750

0

0 State 

Highwa

y 

Agency

Intersectio

ns

S- 87/S-488 Intersection traffic 

control Modify control -

two-way stop to 

roundabout

1 

Numb

ers

1454140

.69

1454140

.69

HSIP 

(Sectio

n 148)

Urban 

Major 

Collector

625

0

0 State 

Highwa

y 

Agency

Intersectio

ns

US 178 

INTERSEC. 

IMPROVEME

NT

Intersection traffic 

control Modify control -

two-way stop to 

roundabout

1 

Numb

ers

130000 130000 HSIP 

(Sectio

n 148)

Rural 

Minor 

Arterial

757

0

0 State 

Highwa

y 

Agency

Intersectio

ns

SC 290 

INTERSEC. 

Intersection geometry 

Auxiliary lanes - add left1 Numb

62574.4

4

62574.4

4

HSIP 

(Sectio

Urban 

Minor 

190

00

0 State 

Highwa

Intersectio

ns
2015 South Carolina Highway Safety Improvement Program

26

IMPROVEME

NT

turn lane ers n 148) Arterial y 

Agency

S- 1912 

INTERSEC. 

IMPROVEME

NT

Intersection geometry 

Intersection geometrics -

modify skew angle

1 

Numb

ers

40000 40000 HSIP 

(Sectio

n 148)

Urban 

Major 

Collector

890

0

0 State 

Highwa

y 

Agency

Intersectio

ns

SC 763 

INTERSEC. 

IMPROVEME

NT

Intersection traffic 

control Intersection 

traffic control - other

1 

Numb

ers

134219.

7

134219.

7

HSIP 

(Sectio

n 148)

Urban 

Minor 

Arterial

655

0

0 State 

Highwa

y 

Agency

Intersectio

ns

S- 65/S663/S-1471

Intersection traffic 

control Intersection 

traffic control - other

1 

Numb

ers

1410933

.55

1410933

.55

HSIP 

(Sectio

n 148)

Rural 

Major 

Collector

253

2

0 State 

Highwa

y 

Agency

Intersectio

ns

I- 85 

INTERSEC. 

IMPROVEME

NT

Intersection geometry 

Intersection geometrics -

modify skew angle

1 

Numb

ers

341284.

02

341284.

02

HSIP 

(Sectio

n 148)

Rural 

Principal 

Arterial -

Interstate

286

75

0 State 

Highwa

y 

Agency

Intersectio

ns

SC 19 

INTERSEC. 

IMPROVEME

NT

Intersection geometry 

Auxiliary lanes - add leftturn lane

1 

Numb

ers

34526.1

5

34526.1

5

HSIP 

(Sectio

n 148)

Rural 

Principal 

Arterial -

Other

104

90

0 State 

Highwa

y 

Agency

Intersectio

ns

SC 38 

INTERSEC. 

IMPROVEME

Intersection traffic 

control Modify control -

two-way stop to 

1 

Numb

148200 148200 HSIP 

(Sectio

Rural 

Minor 

658

8

0 State 

Highwa

y 

Intersectio

ns
2015 South Carolina Highway Safety Improvement Program

27

NT roundabout ers n 148) Arterial Agency

US 17 

INTERSEC. 

IMPROVEME

NTS

Intersection geometry 

Intersection geometry -

other

1 

Numb

ers

661600 661600 HSIP 

(Sectio

n 148)

Urban 

Principal 

Arterial -

Other

513

00

0 State 

Highwa

y 

Agency

Intersectio

ns

S- 529 

INTERSEC. 

IMPROVEME

NT

Intersection traffic 

control Intersection 

traffic control - other

1 

Numb

ers

129042.

04

129042.

04

HSIP 

(Sectio

n 148)

Urban 

Principal 

Arterial -

Other

164

25

0 State 

Highwa

y 

Agency

Intersectio

ns

RUMBLE 

STRIPS ON 

VARIOUS 

ROUTES IN 

DISTRICT 5

Roadway Rumble strips -

edge or shoulder

320.66 

Miles

62406.0

4

62406.0

4

HSIP 

(Sectio

n 148)

Varies 0 0 State 

Highwa

y 

Agency

Roadway 

Departure

HFSC om 

Various 

Routes (I-20, 

I-26, & I-77)

Roadway Pavement 

surface - high friction 

surface

8 

Numb

ers

96000 96000 HSIP 

(Sectio

n 148)

Varies 0 0 State 

Highwa

y 

Agency

Roadway 

Departure

SC 24 

INTERSEC. 

IMPROVEME

NTS

Intersection geometry 

Intersection geometrics -

modify skew angle

1 

Numb

ers

223007.

51

223007.

51

HSIP 

(Sectio

n 148)

Rural 

Principal 

Arterial -

Other

121

50

0 State 

Highwa

y 

Agency

Intersectio

ns

S- 955 

INTERSEC. 

IMPROVEME

Alignment Horizontal 

curve realignment

1 

Numb

ers

23763.1

4

23763.1

4

HSIP 

(Sectio

n 148)

Urban 

Major 

Collector

381

0

0 State 

Highwa

y 

Intersectio

ns
2015 South Carolina Highway Safety Improvement Program

28

NT Agency

SHSP 

MANAGEMEN

T POSITION 

@SCDPS

Non-infrastructure 

Training and workforce 

development

1 

Numb

ers

150000 150000 HSIP 

(Sectio

n 148)

0 0 Employee 

Compensa

tion

S- 77 

INTERSEC. 

IMPROVEME

NT

Intersection geometry 

Intersection geometrics -

modify skew angle

1 

Numb

ers

148393.

2

148393.

2

HSIP 

(Sectio

n 148)

Rural 

Major 

Collector

490

0

0 State 

Highwa

y 

Agency

Intersectio

ns

US 21 

INTERSEC. 

IMPROVEME

NT

Intersection geometry 

Auxiliary lanes - add leftturn lane

1 

Numb

ers

22222.2

2

22222.2

2

HSIP 

(Sectio

n 148)

Urban 

Principal 

Arterial -

Other

195

50

0 State 

Highwa

y 

Agency

Intersectio

ns

I- 26 

REHABILITA

TION

Roadway Superelevation 

/ cross slope

3.27 

Miles

106074.

54

106074.

54

HSIP 

(Sectio

n 148)

Rural 

Principal 

Arterial -

Interstate

0 0 State 

Highwa

y 

Agency

Roadway 

Departure

S- 15 

INTERSEC. 

IMPROVEME

NT

Intersection geometry 

Auxiliary lanes - add leftturn lane

1 

Numb

ers

44423.0

1

44423.0

1

HSIP 

(Sectio

n 148)

Urban 

Minor 

Arterial

805

0

0 State 

Highwa

y 

Agency

Intersectio

ns

SC 81 

INTERSEC. 

IMPROVEME

NTS

Intersection geometry 

Intersection geometrics -

modify skew angle

1 

Numb

ers

175538.

3

175538.

3

HSIP 

(Sectio

n 148)

Rural 

Major 

Collector

322

0

0 State 

Highwa

y 

Agency

Intersectio

ns
2015 South Carolina Highway Safety Improvement Program

29

S- 30 

INTERSEC. 

IMPROVEME

NT

Intersection traffic 

control Intersection 

traffic control - other

1 

Numb

ers

991576.

35

991576.

35

HSIP 

(Sectio

n 148)

Urban 

Minor 

Arterial

106

50

0 State 

Highwa

y 

Agency

Intersectio

ns

SC 254 

INTERSEC. 

IMPROVEME

NT

Intersection geometry 

Auxiliary lanes - add leftturn lane

1 

Numb

ers

33333.3

3

33333.3

3

HSIP 

(Sectio

n 148)

Urban 

Major 

Collector

840

0

0 State 

Highwa

y 

Agency

Intersectio

ns

SC 291 

INTERSEC. 

IMPROVEME

NTS

Intersection geometry 

Intersection geometrics -

modify skew angle

1 

Numb

ers

250000 250000 HSIP 

(Sectio

n 148)

Urban 

Principal 

Arterial -

Other

263

00

0 State 

Highwa

y 

Agency

Intersectio

ns

I- 26 

GUARDRAIL

Roadside Removal of 

roadside objects (trees, 

poles, etc.)

30 

Miles

1910874

.32

1910874

.32

HSIP 

(Sectio

n 148)

Rural 

Principal 

Arterial -

Interstate

378

56

0 State 

Highwa

y 

Agency

Roadway 

Departure

US 52 

INTERSECTI

ON 

IMPROVEME

NTS

Intersection geometry 

Intersection geometry -

other

1 

Numb

ers

20000 20000 HSIP 

(Sectio

n 148)

Rural 

Principal 

Arterial -

Other

196

42

0 State 

Highwa

y 

Agency

Intersectio

ns

S- 25 

INTERSEC. 

IMPROVEME

NT

Intersection geometry 

Intersection geometrics -

modify skew angle

1 

Numb

ers

20076.7 20076.2 HSIP 

(Sectio

n 148)

Urban 

Principal 

Arterial -

Other

168

13

0 State 

Highwa

y 

Agency

Intersectio

ns
2015 South Carolina Highway Safety Improvement Program

30

S- 51 

INTERSEC. 

IMPROVEME

NT

Intersection geometry 

Auxiliary lanes - add leftturn lane

1 

Numb

ers

10000 10000 HSIP 

(Sectio

n 148)

Urban 

Major 

Collector

129

00

0 State 

Highwa

y 

Agency

Intersectio

ns

S- 166 

INTERSEC. 

IMPROVEME

NT

Intersection geometry 

Intersection geometrics -

modify skew angle

1 

Numb

ers

34886.2

3

33810.4

8

HSIP 

(Sectio

n 148)

Urban 

Minor 

Arterial

217

50

0 State 

Highwa

y 

Agency

Intersectio

ns

S- 28 

INTERSEC. 

IMPROVEME

NT

Intersection traffic 

control Intersection 

traffic control - other

1 

Numb

ers

138049.

65

138049.

65

HSIP 

(Sectio

n 148)

Urban 

Major 

Collector

124

50

0 State 

Highwa

y 

Agency

Intersectio

ns

SC 116 

INTERSEC. 

IMPROVEME

NT

Intersection geometry 

Intersection geometry -

other

1 

Numb

ers

2922.14 2922.14 HSIP 

(Sectio

n 148)

Urban 

Major 

Collector

739

1

0 State 

Highwa

y 

Agency

Intersectio

ns

S- 64 

INTERSEC. 

IMPROVEME

NT

Intersection traffic 

control Modify control -

two-way stop to 

roundabout

1 

Numb

ers

489909.

24

489909.

24

HSIP 

(Sectio

n 148)

Rural 

Major 

Collector

330

0

0 State 

Highwa

y 

Agency

Intersectio

ns

US 401 

INTERSEC. 

IMPROVEME

NT

Intersection traffic 

control Modify control -

two-way stop to 

roundabout

1 

Numb

ers

71587.8

9

71587.8

9

HSIP 

(Sectio

n 148)

Rural 

Minor 

Arterial

462

5

0 State 

Highwa

y 

Agency

Intersectio

ns
2015 South Carolina Highway Safety Improvement Program

31

SC 6 

INTERSEC. 

IMPROVEME

NTS

Intersection traffic 

control Modify control -

two-way stop to 

roundabout

1 

Numb

ers

7783.83 7783.83 HSIP 

(Sectio

n 148)

Rural 

Major 

Collector

905

0

0 State 

Highwa

y 

Agency

Intersectio

ns

Low Cost 

Intersection 

Improvemen

ts

Intersection traffic 

control Intersection 

signing -

miscellaneous/other/un

specified

2200 

Numb

ers

150404.

09

150404.

09

HSIP 

(Sectio

n 148)

Varies 0 0 State 

Highwa

y 

Agency

Intersectio

ns

I-20 @ SC 

215 RAMP 

EXTENSIONS

Interchange design 

Extend existing lane on 

ramp

1 

Numb

ers

353779.

62

353779.

62

HSIP 

(Sectio

n 148)

Urban 

Principal 

Arterial -

Interstate

987

00

0 State 

Highwa

y 

Agency

Intersectio

ns

US 321 

INTERSEC. 

IMPROVEME

NTS

Intersection geometry 

Intersection geometrics -

modify skew angle

1 

Numb

ers

96.22 96.22 HSIP 

(Sectio

n 148)

Rural 

Principal 

Arterial -

Other

765

0

0 State 

Highwa

y 

Agency

Intersectio

ns
2015 South Carolina Highway Safety Improvement Program

32

Progress in Achieving Safety Performance Targets

Overview of General Safety Trends

Present data showing the general highway safety trends in the state for the past five years. 

Performance Measures* 2010 2011 2012 2013 2014

Number of fatalities 948.6 905.4 862.6 832 817.4

Number of serious injuries 3718.4 3550.8 3408.6 3357.2 3282.4

Fatality rate (per HMVMT) 1.92 1.84 1.76 1.7 1.66

Serious injury rate (per 

HMVMT)

7.51 7.21 6.97 6.87 6.68

*Performance measure data is presented using a five-year rolling average.
2015 South Carolina Highway Safety Improvement Program

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To the maximum extent possible, present performance measure* data by functional classification and ownership. 

Year - 2014

Function 

Classification

Number of fatalities Number of serious injuries Fatality rate (per HMVMT) Serious injury rate (per HMVMT)

RURAL PRINCIPAL 

ARTERIAL - INTERSTATE

62.4 133.4 0.84 1.78

RURAL PRINCIPAL 

ARTERIAL - OTHER 

FREEWAYS AND 

EXPRESSWAYS

0.4 0.2 0.18 0.09

RURAL PRINCIPAL 

ARTERIAL - OTHER

64.8 198.2 1.65 5.02

RURAL MINOR 

ARTERIAL

94.2 275.4 2.24 6.49

RURAL MINOR 

COLLECTOR

14.8 44.6 5.35 16.18

RURAL MAJOR 

COLLECTOR

170 460.8 3.58 9.68

RURAL LOCAL ROAD OR 

STREET

70.6 228.4 2.86 9.29

URBAN PRINCIPAL 32.2 110.4 0.51 1.75
2015 South Carolina Highway Safety Improvement Program

36

ARTERIAL - INTERSTATE

URBAN PRINCIPAL 

ARTERIAL - OTHER 

FREEWAYS AND 

EXPRESSWAYS

7.8 30 0.99 3.83

URBAN PRINCIPAL 

ARTERIAL - OTHER

104 511.8 1.43 7.02

URBAN MINOR 

ARTERIAL

76.6 382.6 1.32 6.58

URBAN MINOR 

COLLECTOR

0 0.2 0 0.63

URBAN MAJOR 

COLLECTOR

54 244.8 1.55 7.01

URBAN LOCAL ROAD 

OR STREET

39.4 175.6 1.87 8.36

UNKNOWN 26.2 486 0 0
2015 South Carolina Highway Safety Improvement Program

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2015 South Carolina Highway Safety Improvement Program

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2015 South Carolina Highway Safety Improvement Program

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2015 South Carolina Highway Safety Improvement Program

41

Year - 2014

Roadway Ownership Number of 

fatalities

Number of serious 

injuries

Fatality rate (per 

HMVMT)

Serious injury rate (per 

HMVMT)

STATE HIGHWAY AGENCY 775 3033.6 1.64 6.41

COUNTY HIGHWAY AGENCY 0 0 0 0

TOWN OR TOWNSHIP HIGHWAY AGENCY 0 0 0 0

CITY OF MUNICIPAL HIGHWAY AGENCY 0 0 0 0

STATE PARK, FOREST, OR RESERVATION AGENCY 0 0 0 0

LOCAL PARK, FOREST OR RESERVATION AGENCY 0 0 0 0

OTHER STATE AGENCY 0 0 0 0

OTHER LOCAL AGENCY 42.4 248.8 2.43 14.26

PRIVATE (OTHER THAN RAILROAD) 0 0 0 0

RAILROAD 0 0 0 0

STATE TOLL AUTHORITY 0 0 0 0

LOCAL TOLL AUTHORITY 0 0 0 0

OTHER PUBLIC INSTRUMENTALITY (E.G. AIRPORT, 

SCHOOL, UNIVERSITY)

0 0 0 0

INDIAN TRIBE NATION 0 0 0 0
2015 South Carolina Highway Safety Improvement Program

42

0 0 0 0 0

OTHER 0 0 0 0
2015 South Carolina Highway Safety Improvement Program

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2015 South Carolina Highway Safety Improvement Program

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2015 South Carolina Highway Safety Improvement Program

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2015 South Carolina Highway Safety Improvement Program

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2015 South Carolina Highway Safety Improvement Program

47

Describe any other aspects of the general highway safety trends on which you would like to elaborate.

The 2014 data for the previous two questions is preliminary. SCDOT will update the 2014 numbers for 

next year's report. Also, this was the first year SCDOT had data for the functional classification "Rural 

Principal Arterial - Other - Freeways and Expressways". 2014 was also the first year SCDOT split "Urban 

Collector" into Major and Minor. Previously, data for "Urban Collector" was listed under Major. This 

seems to have skewed the five-year average numbers. SCDOT reports roadway ownership as State 

Highway Agency and Local Agency. Roads that are owned by the county, city, and other local roads are 

included in the latter category.

Application of Special Rules

Present the rate of traffic fatalities and serious injuries per capita for drivers and pedestrians over the 

age of 65. 

Older Driver

Performance Measures

2009 2010 2011 2012 2013

Fatality rate (per 

capita)

0.744 0.694 0.656 0.654 0.624

Serious injury rate 

(per capita)

1.502 1.47 1.492 1.498 1.542

Fatality and serious 

injury rate (per capita)

2.244 2.164 2.148 2.152 2.166

*Performance measure data is presented using a five-year rolling average.

The number of fatalities for drivers and pedestrians age 65 and older was obtained from the 

Fatality Analysis Reporting System (FARS). The number of serious injuries for drivers and 

pedestrians age 65 and older was obtained from South Carolina’s data system. The population 

figures were obtained from the MAP-21 Older Drivers and Pedestrians Special Rule Interim 

Guidance table. Population figures are per 1,000 of total population. The rate was obtained by 

taking the number of fatalities (or serious injuries or serious injuries and fatalities) and dividing 

by the population figure. For example, the fatality rate for 2013 was calculated by dividing 82 

by 152 to get 0.54.
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Does the older driver special rule apply to your state? 

No
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Assessment of the Effectiveness of the Improvements (Program 

Evaluation)

What indicators of success can you use to demonstrate effectiveness and success in the Highway 

Safety Improvement Program?

None

Benefit/cost

Policy change

Other: 

What significant programmatic changes have occurred since the last reporting period? 

Shift Focus to Fatalities and Serious Injuries

Include Local Roads in Highway Safety Improvement Program

Organizational Changes

None

Other: Other-Adoption of Target Zero initiative and updated SHSP emaphasis areas

Briefly describe significant program changes that have occurred since the last reporting period. 

SCDOT has update the state's SHSP in accordance with MAP-21 requirements. Part of the update 

includes adoption of the Target Zero initiative and updated emphasis areas.
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SHSP Emphasis Areas

For each SHSP emphasis area that relates to the HSIP, present trends in emphasis area performance measures. 

Year - 2014

HSIP-related SHSP 

Emphasis Areas

Target 

Crash Type

Number of 

fatalities

Number of 

serious injuries

Fatality rate (per 

HMVMT)

Serious injury rate 

(per HMVMT)

Other1Other2Other3
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Groups of similar project types

Present the overall effectiveness of groups of similar types of projects.

Year - 2014

HSIP Subprogram Types

Target 

Crash Type

Number of 

fatalities

Number of 

serious injuries

Fatality rate (per 

HMVMT)

Serious injury rate 

(per HMVMT)

Other1Other2Other3
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Systemic Treatments

Present the overall effectiveness of systemic treatments.

Year - 2014

Systemic 

improvement

Target 

Crash Type

Number of 

fatalities

Number of 

serious injuries

Fatality rate (per 

HMVMT)

Serious injury rate 

(per HMVMT)

Other1Other2Other3
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Describe any other aspects of the overall Highway Safety Improvement Program effectiveness on 

which you would like to elaborate. 

SCDOT completed 20 before and after studies on projects funded through the HSIP since the submission 

of last year's report. The average benefit/ cost ratio of these projects is 23.56. The average crash rate 

reduction for the 20 projects was 51.74%. 

Please note that several sections under "Program Methodology: Select the programs that are 

administered under the HSIP" were not included in this 2015 report due to the lack of detailed 

definitions and identification methodologies. Also omitted from the report are the secions: "HSIP 

Emphasis Areas" (due to difficulty in capturing this data accurately), "Groups of similar project types" 

(due to difficulty defining based on software categories/ groupings), and "Systemic Treatment" (due to 

limited data on systemic treatments). We will continue to work with FHWA in expanding future reports 

as issues with the on-line reporting tool are clarified and resolved. 
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Project Evaluation

Provide project evaluation data for completed projects (optional). 

Location Functiona

l Class

Improvemen

t Category

Improvemen

t Type

BefFata

l

BefSeriou

s 

Injury

Bef-All 

Injurie

s

BefPD

O

BefTota

l

AftFata

l

AftSeriou

s 

Injury

Aft-All 

Injurie

s

AftPD

O

AftTota

l

Evaluatio

n Results 

(Benefit/ 

Cost 

Ratio)

US 78 @ S-131 Urban 

Principal 

Arterial -

Other

Intersection 

geometry

Auxiliary lanes 

- add left-turn 

lane

0 1 18 19 38 0 0 10 21 31 0.55

SC 292 @ S52

Urban 

Minor 

Arterial

Intersection 

geometry

Auxiliary lanes 

- add left-turn 

lane

0 1 1 8 10 0 0 2 2 4 1.26

I-95 (Timber 

Harvest) [MP 

50.5 to 53.0]

Rural 

Principal 

Arteria -

Interstate

Roadside Removal of 

roadside 

objects (trees, 

poles, etc.)

3 0 9 10 22 0 0 1 2 3 130.38

S-40 @ S-370 Rural 

Major 

Collector

Alignment Vertical 

alignment or 

elevation 

change

1 1 4 17 23 0 0 7 6 13 16.55

S-204 @ S- Urban Intersection Modify control 1 0 5 21 27 0 0 1 3 4 13.04
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243 Major 

Collector

traffic control - two-way stop 

to roundabout

SC 28 

(Abbeville 

Hwy) @ S141 

(Beckman 

Drive) & 

Corning 

Street

Rural 

Minor 

Arterial

Intersection 

geometry

Intersection 

geometry -

other

0 0 9 13 22 0 0 3 8 11 1.8

US 76 @ SC 

576

Urban 

Principal 

Arterial -

Other

Intersection 

geometry

Intersection 

geometry -

other

0 1 5 11 17 0 0 4 4 8 1.25

SC 6 @ SC 302 

(Southern 

Intersection)

Rural 

Major 

Collector

Intersection 

geometry

Auxiliary lanes 

- add left-turn 

lane

0 0 11 28 39 0 0 2 1 3 4.85

SC 315 (SC 

170 

Alternate) @ 

S-34

Rural 

Minor 

Arterial

Intersection 

geometry

Auxiliary lanes 

- add two-way 

left-turn lane

0 1 7 18 26 0 0 6 11 17 1.4

S-101 @ S349

Rural 

Major 

Collector

Intersection 

geometry

Auxiliary lanes 

- add left-turn 

lane

0 2 7 10 19 0 0 2 4 6 12.66

S-42 @ S-64 Rural 

Major 

Intersection Intersection 

geometrics -

0 2 8 9 19 0 0 1 4 5 8.94
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Collector geometry modify skew 

angle

SC 116 

(Laurel Bay 

Road) @ S597 (Stanley 

Farm Road)

Urban 

Major 

Collector

Intersection 

geometry

Auxiliary lanes 

- add left-turn 

lane

0 4 14 8 26 0 2 7 1 10 5.53

SC 116 

(Laurel Bay 

Road) @ S390 (Stanley 

Road)

Urban 

Major 

Collector

Intersection 

geometry

Auxiliary lanes 

- add left-turn 

lane

0 0 3 7 10 0 1 2 3 6 0.28

US 701 

(Fraser 

Street) @ S-4 

(Choppee 

Road)

Rural 

Minor 

Arterial

Intersection 

geometry

Auxiliary lanes 

- add left-turn 

lane

0 2 5 5 12 0 1 2 3 6 9.18

SC 11 (Hwy 

11) @ S-135 

(Mountain 

Road/ Critter 

Road)

Rural 

Minor 

Arterial

Intersection 

geometry

Auxiliary lanes 

- add left-turn 

lane

0 1 10 5 16 0 0 1 1 2 6.65

I-126 @ US 

21/176/321 

(Huger 

Street)

Urban 

Principal 

Arterial -

Interstate

Roadway Pavement 

surface - high 

friction surface

1 1 7 27 36 0 1 1 2 4 148.72
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S-535 (Royle 

Rd) @ S-1258 

(Farmington 

Rd)

Urban 

Major 

Collector

Access 

management

Change in 

access - close 

or restrict 

existing access

0 1 8 25 34 0 0 4 22 26 -0.88

SC 12 

(Percival 

Road) @ S1196 (E 

Boundary 

Road)

Urban 

Minor 

Arterial

Intersection 

geometry

Intersection 

geometrics -

modify skew 

angle

0 2 6 13 21 0 0 7 13 20 10.75

US 1 (Two 

Notch Rd) @ 

S-2033 

(Sparkleberr

y Rd)

Urban 

Principal 

Arterial -

Other

Access 

management

Change in 

access - close 

or restrict 

existing access

0 3 31 123 157 0 0 17 69 86 23.23

SC 9 Bypass 

@ S-66

Rural 

Major 

Collector

Intersection 

geometry

Intersection 

geometry -

other

1 2 5 1 9 0 0 1 0 1 75.13
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Optional Attachments

Sections Files Attached
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Glossary

5 year rolling average means the average of five individual, consecutive annual points of data (e.g. 

annual fatality rate).

Emphasis area means a highway safety priority in a State’s SHSP, identified through a data-driven, 

collaborative process. 

Highway safety improvement project means strategies, activities and projects on a public road that are 

consistent with a State strategic highway safety plan and corrects or improves a hazardous road location 

or feature or addresses a highway safety problem. 

HMVMT means hundred million vehicle miles traveled.

Non-infrastructure projects are projects that do not result in construction. Examples of noninfrastructure projects include road safety audits, transportation safety planning activities, 

improvements in the collection and analysis of data, education and outreach, and enforcement 

activities.

Older driver special rule applies if traffic fatalities and serious injuries per capita for drivers and 

pedestrians over the age of 65 in a State increases during the most recent 2-year period for which data 

are available, as defined in the Older Driver and Pedestrian Special Rule Interim Guidance dated 

February 13, 2013. 

Performance measure means indicators that enable decision-makers and other stakeholders to monitor 

changes in system condition and performance against established visions, goals, and objectives.

Programmed funds mean those funds that have been programmed in the Statewide Transportation 

Improvement Program (STIP) to be expended on highway safety improvement projects.

Roadway Functional Classification means the process by which streets and highways are grouped into 

classes, or systems, according to the character of service they are intended to provide.

Strategic Highway Safety Plan (SHSP) means a comprehensive, multi-disciplinary plan, based on safety 

data developed by a State Department of Transportation in accordance with 23 U.S.C. 148. 

Systemic safety improvement means an improvement that is widely implemented based on high risk 

roadway features that are correlated with specific severe crash types. 

Transfer means, in accordance with provisions of 23 U.S.C. 126, a State may transfer from an 

apportionment under section 104(b) not to exceed 50 percent of the amount apportioned for the fiscal 

year to any other apportionment of the State under that section.