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SOUTH CAROLINA 

2022 ANNUAL REPORT 

Disclaimer: This report is the property of the State Department of Transportation (State DOT). The State DOT 

completes the report by entering applicable information into the Federal Highway Administration’s (FHWA) Highway 

Safety Improvement Program (HSIP) online reporting tool. Once the State DOT completes the report pertaining to its 

State, it coordinates with its respective FHWA Division Office to ensure the report meets all legislative and regulatory 

requirements. FHWA’s Headquarters Office of Safety then downloads the State’s finalized report and posts it to the 

website (https://highways.dot.gov/safety/hsip/reporting) as required by law (23 U.S.C. 148(h)(3)(A)). 
2022 South Carolina Highway Safety Improvement Program

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Table of Contents

Disclaimer .............................................................................................................................................3

Protection of Data from Discovery Admission into Evidence .............................................................3

Executive Summary ..............................................................................................................................4

Introduction ...........................................................................................................................................5

Program Structure ................................................................................................................................. 5

Program Administration .....................................................................................................................5

Program Methodology .......................................................................................................................7

Project Implementation .......................................................................................................................15

Funds Programmed .........................................................................................................................15

General Listing of Projects ..............................................................................................................17

Safety Performance ............................................................................................................................22

General Highway Safety Trends ......................................................................................................22

Safety Performance Targets ............................................................................................................27

Applicability of Special Rules...........................................................................................................30

Evaluation ...........................................................................................................................................31

Program Effectiveness ....................................................................................................................31

Effectiveness of Groupings or Similar Types of Improvements .......................................................31

Project Effectiveness .......................................................................................................................35

Compliance Assessment.....................................................................................................................37

Optional Attachments ..........................................................................................................................40

Glossary ..............................................................................................................................................41
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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. 407 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.” 
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Executive Summary

In 2005, the Safe, Accountable, Flexible, and Efficient Transportation Equity Act: A Legacy for Users 

(SAFETEA-LU) established the Highway Safety Improvement Program as a core Federal-aid program with the 

goal of achieving a signification reduction in fatalities and serious injuries on all public roads under Section 

148, Title 23 of the United States Code (23 USC 148). The program has continued through the enactment of 

the Moving Ahead for Progress in the 21st Century Act (MAP-21) in 2012 and the Fixing America's Surface 

Transportation Act (FAST Act) in 2015. 

The Highway Safety Improvement Program (HSIP) emphasizes a data-driven, performance-based strategic 

approach to improving highway safety, through the development and implementation of a Strategic Highway 

Safety Plan (SHSP), a comprehensive plan that establishes statewide highway safety goals, objectives, and 

key emphasis areas intended to drive HSIP investment decisions. 

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 93 percent of fatal crashes 

and the vast majority of severe crashes occur on the state system. Previous HSIP annual reports were 

reported on a calendar year basis. As of this report, the HSIP office has decided to revise the reporting period 

of the HSIP Annual Report to be more aligned with the state's HSIP Implementation Plan report. This report 

will now document crash data on a calendar year basis (January 1, 2021 to December 31, 2021), but will show 

funding obligations based on Federal Fiscal Year (FFY) from October 1, 2021 to September 31, 2022. 

Based on before and after analysis of HSIP projects with at least 3 years of crash data available after 

completion, the state has averaged a B/C ratio of 5.7 from these locations with a 34.7% reduction in all F&SI 

crashes. 
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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 Reporting Guidance dated 

December 29, 2016 and consists of five sections: program structure, progress in implementing highway safety 

improvement projects, progress in achieving safety outcomes and performance targets, effectiveness of the 

improvements and compliance assessment. 

Program Structure

Program Administration 

Describe the general structure of the HSIP in the State. 

The Highway Safety Improvement Program is housed and implemented through the Traffic Engineering-Traffic 

Safety Office located at SCDOT headquarters. This office is composed of five groups: Highway Safety 

Improvement Program (HSIP), Railroad/Research, Safety Program Administration, Safety Project 

Development, and Strategic Highway Safety Planning & Research group. The HSIP group is responsible for all 

aspects of the HSIP process: planning, implementation, and evaluation. 

HSIP funding is currently allocated to align with crash categories and emphasis areas from the Strategic 

Highway Safety Plan (SHSP). The funding for these Emphasis area is as follows with some overlap between 

categories: 

• Roadway Departure ($20 Million) 

o Interstate Safety Program ($11M) 

o Roadway Departure Mitigation Program ($9M) 

• Intersections and Other High Risk Locations ($18 Million) 

o Intersection Safety Program ($13M) 

o Road Safety Assessments Program ($5M) 

• Non-Motorized Users ($5 Million) 

• Safety Data Analysis ($2 Million) 

Where is HSIP staff located within the State DOT? 

 Engineering

How are HSIP funds allocated in a State? 

• SHSP Emphasis Area Data 

• Other-Central Office through Statewide Screening Process 

Describe how local and tribal roads are addressed as part of HSIP. 

In South Carolina, the vast majority (~93%) 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 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, local roads are being incorporated into our Road 
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Inventory Management System (RIMS) for analysis. The Traffic-Safety office and HSIP office staff also make 

themselves available to assist when requested by our local partners (MPO, COGS, Counties, Cities, etc.) with 

reviews and recommendations regarding safety performance and potential improvements for local projects.

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

41,400 center-line miles of roadway, despite a land area of roughly 32,000 square miles.

Identify which internal partners (e.g., State departments of transportation (DOTs) 

Bureaus, Divisions) are involved with HSIP planning.

• Design

• Districts/Regions

• Local Aid Programs Office/Division

• Maintenance

• Operations

• Planning

• Traffic Engineering/Safety

Describe coordination with internal partners.

Several partners within SCDOT and consultants are involved throughout 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. Consultant led designs are 

reviewed and approved by internal staff. 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 HSIP planning.

• FHWA

• Governors Highway Safety Office

• Law Enforcement Agency

• Local Government Agency 

• Regional Planning Organizations (e.g. MPOs, RPOs, COGs)

Describe coordination with external partners.

SCDOT has a long history of working with external partners to further the Target Zero mission in the state. 

Perhaps the closest relationship exists between SCDOT and the South Carolina Department of Public Safety 

(SCDPS). In the past year, SCDOT was involved in a new data driven enforcement initiative led by SCDPS 

using crash data located on SCDOT’s line work to identify locations in the state with the greatest potential to 

reduce collisions related to DUI, speed, and unbelted occupants. In South Carolina, the Governors Highway 

Safety Office is located in the SCDPS under the title ‘Office of Highway Safety and Justice Programs 

(OHSJP)'.
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SCDOT and SCDPS also worked together to update the state’s Strategic Highway Safety Plan (SHSP) in 

2020. The SHSP was shared with a number of additional partners for input before it was finalized. These 

partners included, but were not limited to, the SC Department of Motor Vehicles, the SC Department of Health 

and Environmental Control, the Traffic Records Coordinating Committee, the Motorcycle Safety Task Force, 

the Impaired Driving Prevention Council, and the Palmetto Cycling Coalition.

As part of implementing the state’s SHSP, SCDOT assisted SCDPS in extensive data analysis to identify 

locations throughout the state that had high occurrences of traffic collisions that could be corrected with 

increased enforcement activity.

The SCDOT Traffic Engineering Safety Office provides collision data to MPOs and COGs on a regular basis. In 

the past year, the office has received many requests for evaluating crash data and performing Highway Safety 

Manual analysis on specific locations.

The SCDOT Traffic Engineering Safety Office provides information related to the statewide safety performance 

targets to all MPOs and COGs, and includes baseline data for every study area. Representatives from the 

Traffic Safety Office attend MPO and COG meetings as requested to share collision data and crash type 

analysis. Additionally, through the Department’s new Feasibility Report process, the Traffic Safety Office is 

involved at the beginning stages of project development to ensure safety improvements are included in all 

projects, including MPO and COG projects.

SCDOT completed the state’s first Pedestrian and Bicycle Safety Action Plan (PBSAP). A stakeholder team 

was formed to assist the team in developing a comprehensive plan. This team included members from a 

variety of external partners and stakeholders.

Program Methodology

Does the State have an HSIP manual or similar that clearly describes HSIP planning, 

implementation and evaluation processes?

Yes

SCDOT utilizes Engineering Directives (ED) and internal staff memos that outline the project selection/ranking 

process. Typically projects that require commission approval use Engineering Directives while projects that do 

not require approval from the SCDOT Commission use internal staff memos. 

ED-71 Safety Intersection Project Prioritization Process

ED-72 Rural Road Safety Project Prioritization Process (State Funded)

ED-73 Interstate Safety Project Selection

ED-74 Road Safety Assessment Project Selection

ED-75 Non-Motorized User Safety Project Selection (Bike/Ped)

Select the programs that are administered under the HSIP.

• Intersection

• Roadway Departure

• Other-Interstates

• Other-Vulnerable Road User
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• Other-Road Safety Assessment

Program: Intersection

Date of Program Methodology:4/13/2017

What is the justification for this program? 

• Addresses SHSP priority or emphasis area

• FHWA focused approach to safety

What is the funding approach for this program? 

Funding set-aside

What data types were used in the program methodology? 

Crashes Exposure Roadway 

• All crashes

• Fatal crashes only

• Fatal and serious injury crashes 

only

• Traffic

• Volume • Functional classification

What project identification methodology was used for this program? 

• Crash frequency

• Crash rate

• Excess expected crash frequency using SPFs

• Relative severity index

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

program?

Yes

Are local road projects identified using the same methodology as state roads?

No

Describe the methodology used to identify local road projects as part of this program.

If a state maintained roadway/intersection is identified for safety improvements, but the intersecting 

roadway is a locally owned road, we will coordinate our intersection improvements with the local 

agency. 

How are projects under this program advanced for implementation?

• selection committee

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

selected, indicate the relative importance of each process in project prioritization. 
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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).

Rank of Priority Consideration

Ranking based on B/C:3

Available funding:2

Ranking based on net benefit:3

Cost Effectiveness:1

Program: Roadway Departure

Date of Program Methodology:1/1/2020

What is the justification for this program? 

• Addresses SHSP priority or emphasis area

• FHWA focused approach to safety

What is the funding approach for this program? 

Funding set-aside

What data types were used in the program methodology? 

Crashes Exposure Roadway 

• All crashes

• Fatal and serious injury crashes 

only

• Other-Roadway Departure 

Percentage

• Lane miles • Functional classification

• Other-Number of Travel Lanes

What project identification methodology was used for this program? 

• Crash frequency

• Crash rate

• Other-Roadway Departure Crash Percentage

• Other-Roadway Departure F&SI Crashes

• Relative severity index

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

program?

No

Are local road projects identified using the same methodology as state roads?

How are projects under this program advanced for implementation?
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• selection committee

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).

Rank of Priority Consideration

Available funding:2

Other-Roadway Departure Crashes:1

Program: Other-Interstates

Date of Program Methodology:7/25/2018

What is the justification for this program? 

• Addresses SHSP priority or emphasis area

What is the funding approach for this program? 

Funding set-aside

What data types were used in the program methodology? 

Crashes Exposure Roadway 

• Fatal and serious injury crashes 

only • Lane miles

• Median width

• Functional classification

• Roadside features

What project identification methodology was used for this program? 

• Crash frequency

• Crash rate

• Relative severity index

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

program?

No

Are local road projects identified using the same methodology as state roads?

How are projects under this program advanced for implementation?

• selection committee
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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).

Rank of Priority Consideration

Ranking based on B/C:1

Available funding:2

Cost Effectiveness:2

While Interstates themselves are not a specific priority or emphasis area in the state SHSP, SCDOT's guiding 

document (ED-73) for HSIP Interstate project screening, ranking, and selection is based on roadway departure 

crashes, which is an emphasis area for the state. Additionally, by making targeted improvements to the 

interstate, these can potentially help reduce crashes and severity regarding other SHSP emphasis areas. 

Program: Other-Vulnerable Road User

Date of Program Methodology:7/25/2018

What is the justification for this program? 

• Addresses SHSP priority or emphasis area

• FHWA focused approach to safety

What is the funding approach for this program? 

Funding set-aside

What data types were used in the program methodology? 

Crashes Exposure Roadway 

• Other-All Vulnerable Road User 

(Bike/Ped) Crashes

What project identification methodology was used for this program? 

• Crash frequency

• Crash rate

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

program?

No

Are local road projects identified using the same methodology as state roads?

How are projects under this program advanced for implementation?
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• selection committee

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).

Rank of Priority Consideration

Available funding:2

Other-Crash Density (Bike/Ped):1

The office of Traffic Safety has recently completed the states first Pedestrian and Bicycle Safety Action Plan 

(PBSAP) in early 2022 as recommended from the 2020 SHSP. From this report, locations for potential 

improvements for pedestrians and bicyclists were created based on both crash history and roadway conditions. 

This approach will allow the Traffic Safety office along with other agencies, such as counties, MPO's, and 

COG's, to not only react to locations with existing crash history but also take a pro-active approach to 

implement systemic improvements to locations identified as 'high-risk' based on the roadway environment and 

surrounding social conditions. As of this report, the first round of Bike-Ped RSA's as identified from the PBSAP, 

are commission approved and in the beginning phases of scoping and contract negotiations. It is anticipated 

that the first round of RSA's should be completed by early 2023. 

Program: Other-Road Safety Assessment

Date of Program Methodology:7/25/2018

What is the justification for this program? 

• Addresses SHSP priority or emphasis area

• FHWA focused approach to safety

What is the funding approach for this program? 

Funding set-aside

What data types were used in the program methodology? 

Crashes Exposure Roadway 

• Fatal and serious injury crashes 

only • Lane miles

• Median width

• Functional classification

• Roadside features

What project identification methodology was used for this program? 

• Crash frequency

• Crash rate

• Relative severity index
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Are local roads (non-state owned and operated) included or addressed in this 

program?

No

Are local road projects identified using the same methodology as state roads?

How are projects under this program advanced for implementation?

• selection committee

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).

Rank of Priority Consideration

Available funding:3

Cost Effectiveness:2

Other-Total F&SI:1

Once HSIP eligible project locations are identified, SCDOT utilizes its robust RSA program to aid in 

progressing the projects forward. The office of traffic safety utilizes roadway, intersection, and vulnerable 

roadway user (Bike & Pedestrian) focused RSA's based on the type of project, project location, or the crash 

data used to identify the project. The RSA reports are used at as a planning level document to aid in decisions 

as the projects are advanced from planning, design and ultimately construction. 

What percentage of HSIP funds address systemic improvements? 

 60

 HSIP funds are used to address which of the following systemic 

improvements? 

• Add/Upgrade/Modify/Remove Traffic Signal 

• Cable Median Barriers 

• Clear Zone Improvements 

• High friction surface treatment 

• Horizontal curve signs 

• Install/Improve Lighting 

• Install/Improve Pavement Marking and/or Delineation 

• Install/Improve Signing 

• Pavement/Shoulder Widening 

• Rumble Strips 

• Safety Edge 

What process is used to identify potential countermeasures? 

• Crash data analysis 
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• Data-driven safety analysis tools (HSM, CMF Clearinghouse, SafetyAnalyst, usRAP)

• Engineering Study

• Road Safety Assessment

• SHSP/Local road safety plan

• Stakeholder input

Does the State HSIP consider connected vehicles and ITS technologies? 

No

Does the State use the Highway Safety Manual to support HSIP efforts?

Yes

Please describe how the State uses the HSM to support HSIP efforts.

As locations are identified and reviewed for project implementation, select projects may use HSM analysis 

(Crash predictions, CMF's, etc) to review safety performance along with potential countermeasures and design 

alternatives to help drive project decisions.
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Project Implementation

Funds Programmed 

Reporting period for HSIP funding.

Federal Fiscal Year

As of this report, the HSIP office has decided to revise the reporting period of the HSIP Annual Report (HSIPAR) to be more aligned with the state's HSIP Implementation Plan. This 2022 HSIP-AR will continue to 

document crash data on a calendar year basis (January 1, 2021 to December 31, 2021), but will report funding 

obligations based on current Federal Fiscal Year (FFY) from October 1, 2021 to September 31, 2022. 

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

FUNDING CATEGORY PROGRAMMED OBLIGATED % 

OBLIGATED/PROGRAMMED

HSIP (23 U.S.C. 148) $56,271,117 $39,163,457 69.6%

HRRR Special Rule (23 

U.S.C. 148(g)(1))

$0 $0 0%

Penalty Funds (23 U.S.C. 

154)

$0 $0 0%

Penalty Funds (23 U.S.C. 

164)

$0 $13,839,840 0%

RHCP (for HSIP 

purposes) (23 U.S.C. 

130(e)(2))

$0 $0 0%

Other Federal-aid Funds 

(i.e. STBG, NHPP)

$0 $0 0%

State and Local Funds $4,562,523 $216,069 4.74%

Totals $60,833,640 $53,219,366 87.48%

Data is current as of 8/28/2022. The reporting period is FY2022. SCDOT projects obligating an additional 

$6,000,000 in HSIP funds prior to the end of the FY2022 reporting period. This would mean that the amount of 

Total HSIP funds obligated would be $59,219,365.91, or 97% of the FY2022 Programmed HSIP funds. 

Note that the obligation amounts are for projects Authorized in FY2022, it does not include any obligations or 

de-obligations to older projects or any conversions of Advanced Construction to real funds. We believe that this 

is a more accurate representation of the SCDOT HSIP program funding. 

The Programmed amount is taken from the SCDOT eSTIP. The SCDOT has one category for Highway Safety 

Program and does not designate a difference in the STIP between HSIP funds and Section 164 Penalty funds. 

How much funding is programmed to local (non-state owned and operated) or tribal 

safety projects? 

0%
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How much funding is obligated to local or tribal safety projects?

0%

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

4%

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

4%

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

during the reporting period under 23 U.S.C. 126?

$0

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

the reporting period under 23 U.S.C. 126?

50%

Discuss impediments to obligating HSIP funds and plans to overcome this challenge in 

the future.

None reportable at this time. 
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General Listing of Projects 

List the projects obligated using HSIP funds for the reporting period.

PROJECT NAME IMPROVEMENT 

CATEGORY SUBCATEGORY OUTPUTS OUTPUT TYPE

HSIP 

PROJECT 

COST($)

TOTAL 

PROJECT 

COST($)

FUNDING 

CATEGORY

LAND 

USE/AREA 

TYPE

FUNCTIONAL 

CLASSIFICATION AADT SPEED OWNERSHIP

METHOD 

FOR SITE 

SELECTION

SHSP 

EMPHASIS 

AREA

SHSP 

STRATEGY

Flashing Yellow 

Arrow District 5 

Construction

Intersection 

traffic control

Modify traffic 

signal – add 

flashing yellow 

arrow

$602893 $602893 HSIP (23 

U.S.C. 148)

Multiple/Varies Multiple/Varies 0 State 

Highway 

Agency

Spot Intersections

S-145 

(Stormbranch 

Road) MP 0.877 

to MP 10.426 - 

Aiken County

Roadway Roadway - other $3191363 $3207432 HSIP (23 

U.S.C. 148)

Rural Major Collector 0 State 

Highway 

Agency

Spot Roadway 

Departure

S-46 (Smallwood 

Road) MP 0 to MP 

6.57 - Fairfield 

County

Roadway Roadway - other $2195383 $2195383 HSIP (23 

U.S.C. 148)

Rural Major Collector 0 State 

Highway 

Agency

Spot Roadway 

Departure

S-29 (Armenia 

Road) MP 0 to MP 

6.89 - Chester 

County

Roadway Roadway - other $2972037 $2972037 HSIP (23 

U.S.C. 148)

Rural Major Collector 0 State 

Highway 

Agency

Spot Roadway 

Departure

US 321 (Columbia 

Road) MP 3.650 

to MP 8.815 - 

Chester County

Roadway Roadway - other $3368142 $3368142 HSIP (23 

U.S.C. 148)

Rural Minor Arterial 0 State 

Highway 

Agency

Spot Roadway 

Departure

S-18 (Salem 

Road) MP 1.443 

to 6.450 - 

Marlboro County

Roadway Roadway - other $1760652 $1760652 HSIP (23 

U.S.C. 148)

Rural Major Collector 0 State 

Highway 

Agency

Spot Roadway 

Departure

S-98 (Cainhoy 

Road) MP 0 to MP 

8.21 - Berkeley 

County

Roadway Roadway - other $1882844 $1882844 HSIP (23 

U.S.C. 148)

Rural Major Collector 0 State 

Highway 

Agency

Spot Roadway 

Departure

SC 45 (French 

Santee Road) MP 

44.8 to MP 49.8 - 

Berkeley County

Roadway Roadway - other $2682872 $2682872 HSIP (23 

U.S.C. 148)

Rural Major Collector 0 State 

Highway 

Agency

Spot Roadway 

Departure

Interstate 

Guardrail Project - 

Statewide

Roadway Roadway - other $497014 $497014 HSIP (23 

U.S.C. 148)

Rural Principal ArterialInterstate0 State 

Highway 

Agency

Systemic Roadway 

Departure

Intersections 

Improvement US 

378 (Hwy 378) 

with S-35 (Walker 

Rd)/SC 67 

(Callison Hwy)

Intersection 

geometry

Intersection 

geometry - other

$150000 $150000 Penalty 

Funds (23 

U.S.C. 164)

Rural Minor Arterial 0 State 

Highway 

Agency

Spot Intersections
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PROJECT NAME IMPROVEMENT 

CATEGORY SUBCATEGORY OUTPUTS OUTPUT TYPE

HSIP 

PROJECT 

COST($)

TOTAL 

PROJECT 

COST($)

FUNDING 

CATEGORY

LAND 

USE/AREA 

TYPE

FUNCTIONAL 

CLASSIFICATION AADT SPEED OWNERSHIP

METHOD 

FOR SITE 

SELECTION

SHSP 

EMPHASIS 

AREA

SHSP 

STRATEGY

Intersection 

Improvement US 

21 (Columbia Rd) 

/ SC 172 (Bull 

Swamp Rd)/SC 6 

(Caw Caw Hwy)

Intersection 

geometry

Intersection 

geometry - other

$200000 $200000 Penalty 

Funds (23 

U.S.C. 164)

Rural Major Collector 0 State 

Highway 

Agency

Spot Intersections

Intersections 

Improvement SC 

389 (John Nunn 

Hwy) / SC 394 

(Salley Rd)

Intersection 

geometry

Intersection 

geometry - other

$250000 $250000 Penalty 

Funds (23 

U.S.C. 164)

Rural Major Collector 0 State 

Highway 

Agency

Spot Intersections

Intersections 

Improvement SC 

81 (Anderson Rd) 

/ L-183 (McNeely 

Rd)

Intersection 

geometry

Intersection 

geometry - other

$150000 $150000 Penalty 

Funds (23 

U.S.C. 164)

Urban Minor Arterial 0 State 

Highway 

Agency

Spot Intersections

Intersections 

Improvement SC 

290 (Locust Hill 

Rd) / S-173 

(Tigerville Rd)

Intersection 

geometry

Intersection 

geometry - other

$250000 $250000 Penalty 

Funds (23 

U.S.C. 164)

Rural Major Collector 0 State 

Highway 

Agency

Spot Intersections

Intersections 

Improvement SC 

9 (Jonesville 

Lockhart Hwy) / 

SC 114 (Bob Little 

Rd)

Intersection 

geometry

Intersection 

geometry - other

$2500000 $2500000 Penalty 

Funds (23 

U.S.C. 164)

Rural Principal ArterialOther0 State 

Highway 

Agency

Spot Intersections

Intersections 

Improvement SC 

200 (Monroe 

Hwy) / S-28 

(Shiloh Unity Rd)

Intersection 

geometry

Intersection 

geometry - other

$250000 $250000 Penalty 

Funds (23 

U.S.C. 164)

Rural Major Collector 0 State 

Highway 

Agency

Spot Intersections

Intersections 

Improvement SC 

81 (Anderson Rd) 

/ L-912 (Cely Ln)

Intersection 

geometry

Intersection 

geometry - other

$150000 $150000 Penalty 

Funds (23 

U.S.C. 164)

Urban Minor Arterial 0 State 

Highway 

Agency

Spot Intersections

Intersections 

Improvement S31 (Red Bluff Rd) / 

S-66 (Hwy 66)

Intersection 

geometry

Intersection 

geometry - other

$250000 $250000 Penalty 

Funds (23 

U.S.C. 164)

Rural Major Collector 0 State 

Highway 

Agency

Spot Intersections

Intersections 

Improvement SC 

116 (Laurel Bay 

Rd) / S-597 

(Stanley Farm Rd)

Intersection 

geometry

Intersection 

geometry - other

$250000 $250000 Penalty 

Funds (23 

U.S.C. 164)

Urban Major Collector 0 State 

Highway 

Agency

Spot Intersections
2022 South Carolina Highway Safety Improvement Program

Page 19 of 41

PROJECT NAME IMPROVEMENT 

CATEGORY SUBCATEGORY OUTPUTS OUTPUT TYPE

HSIP 

PROJECT 

COST($)

TOTAL 

PROJECT 

COST($)

FUNDING 

CATEGORY

LAND 

USE/AREA 

TYPE

FUNCTIONAL 

CLASSIFICATION AADT SPEED OWNERSHIP

METHOD 

FOR SITE 

SELECTION

SHSP 

EMPHASIS 

AREA

SHSP 

STRATEGY

Intersections 

Improvement US 

178 (Liberty Hwy) 

/ S-73 (Baugh Rd) 

/ S-27 (Ruhmah 

Rd)

Intersection 

geometry

Intersection 

geometry - other

$250000 $250000 Penalty 

Funds (23 

U.S.C. 164)

Rural Minor Arterial 0 State 

Highway 

Agency

Spot Intersections

Intersections 

Improvement SC 

6 (Highway 6) / S65 Meadowfield 

Rd)/L-65 (Jim 

Spence Rd)

Intersection 

geometry

Intersection 

geometry - other

$200000 $200000 Penalty 

Funds (23 

U.S.C. 164)

Rural Major Collector 0 State 

Highway 

Agency

Spot Intersections

Intersections 

Improvement SC 

183 (Farrs Bridge 

Rd) / S-55 (Ireland 

Rd)

Intersection 

geometry

Intersection 

geometry - other

$150000 $150000 Penalty 

Funds (23 

U.S.C. 164)

Rural Minor Arterial 0 State 

Highway 

Agency

Spot Intersections

Intersections 

Improvement US 

278 

(Independence 

Blvd) / S-442 

(Argent Blvd)

Intersection 

geometry

Intersection 

geometry - other

$250000 $250000 Penalty 

Funds (23 

U.S.C. 164)

Rural Principal ArterialOther0 State 

Highway 

Agency

Spot Intersections

Intersections 

Improvement US 

378 (Myrtle Beach 

Hwy) / SC 527 (S 

Brick Church Rd)

Intersection 

geometry

Intersection 

geometry - other

$250000 $250000 Penalty 

Funds (23 

U.S.C. 164)

Rural Principal ArterialOther0 State 

Highway 

Agency

Spot Intersections

Intersections 

Improvement US 

25 / US 25 Conn

Intersection 

geometry

Intersection 

geometry - other

$250000 $250000 Penalty 

Funds (23 

U.S.C. 164)

Urban Principal ArterialOther0 State 

Highway 

Agency

Spot Intersections

Intersections 

Improvement US 

501 (E Hwy 501) / 

S-132 (WM 

Nobles Rd)/Ridge 

Rd

Intersection 

geometry

Intersection 

geometry - other

$150000 $150000 Penalty 

Funds (23 

U.S.C. 164)

Rural Principal ArterialOther0 State 

Highway 

Agency

Spot Intersections

S-34 (Pond 

Branch Road) MP 

0.09 to MP 5.69 

and MP 8.77 to 

8.89 - Lexington 

County

Roadway Roadway - other $1627481 $1627481 HSIP (23 

U.S.C. 148)

Rural Major Collector 0 State 

Highway 

Agency

Spot Roadway 

Departure

Work Zone LE 

Scheduling 

Software

Miscellaneous Work zone 

enforcement

$900000 $1000000 HSIP (23 

U.S.C. 148)

Multiple/Varies Multiple/Varies 0 State 

Highway 

Agency

Work Zone 

data analysis

Data
2022 South Carolina Highway Safety Improvement Program

Page 20 of 41

PROJECT NAME IMPROVEMENT 

CATEGORY SUBCATEGORY OUTPUTS OUTPUT TYPE

HSIP 

PROJECT 

COST($)

TOTAL 

PROJECT 

COST($)

FUNDING 

CATEGORY

LAND 

USE/AREA 

TYPE

FUNCTIONAL 

CLASSIFICATION AADT SPEED OWNERSHIP

METHOD 

FOR SITE 

SELECTION

SHSP 

EMPHASIS 

AREA

SHSP 

STRATEGY

2022 Center Line 

Milled in Rumble 

Stripes District 1

Roadway Rumble strips – 

edge or shoulder

$836868 $836868 HSIP (23 

U.S.C. 148)

Multiple/Varies Multiple/Varies 0 State 

Highway 

Agency

Systemic Roadway 

Departure

2022 Center Line 

Milled in Rumble 

Stripes District 2

Roadway Rumble strips – 

edge or shoulder

$2760237 $2760237 HSIP (23 

U.S.C. 148)

Multiple/Varies Multiple/Varies 0 State 

Highway 

Agency

Systemic Roadway 

Departure

2022 Center Line 

Milled in Rumble 

Stripes District 3

Roadway Rumble strips – 

edge or shoulder

$1763396 $1763396 HSIP (23 

U.S.C. 148)

Multiple/Varies Multiple/Varies 0 State 

Highway 

Agency

Systemic Roadway 

Departure

2022 Center Line 

Milled in Rumble 

Stripes District 4

Roadway Rumble strips – 

edge or shoulder

$1838438 $1838438 HSIP (23 

U.S.C. 148)

Multiple/Varies Multiple/Varies 0 State 

Highway 

Agency

Systemic Roadway 

Departure

2022 Center Line 

Milled in Rumble 

Stripes District 5

Roadway Rumble strips – 

edge or shoulder

$3433745 $3433745 HSIP (23 

U.S.C. 148)

Multiple/Varies Multiple/Varies 0 State 

Highway 

Agency

Systemic Roadway 

Departure

2022 Center Line 

Milled in Rumble 

Stripes District 6

Roadway Rumble strips – 

edge or shoulder

$2943083 $2943083 HSIP (23 

U.S.C. 148)

Multiple/Varies Multiple/Varies 0 State 

Highway 

Agency

Systemic Roadway 

Departure

2022 Center Line 

Milled in Rumble 

Stripes District 7

Roadway Rumble strips – 

edge or shoulder

$2940929 $2940929 HSIP (23 

U.S.C. 148)

Multiple/Varies Multiple/Varies 0 State 

Highway 

Agency

Systemic Roadway 

Departure

FY 22 Preliminary 

Engineering 

phase for RDM 

Program

Miscellaneous Transportation 

safety planning

$100000 $100000 HSIP (23 

U.S.C. 148)

Multiple/Varies Multiple/Varies 0 State 

Highway 

Agency

Systemic Roadway 

Departure

District 6 RDM 

Improvements on 

selected routes 

FY 22

Roadway Rumble strips – 

edge or shoulder

$1267044 $1267044 HSIP (23 

U.S.C. 148)

Multiple/Varies Multiple/Varies 0 State 

Highway 

Agency

Systemic Roadway 

Departure

S-40 (N Saint 

Pauls Church 

Road) MP 0.00 to 

MP 4.10 - Sumter 

County

Roadway Roadway - other $1280642 $1280642 HSIP (23 

U.S.C. 148)

Multiple/Varies Multiple/Varies 0 State 

Highway 

Agency

Spot Roadway 

Departure

S-144/S-385 

(Turner Hill Road) 

- 

Pickens/Anderson 

Counties

Intersection 

geometry

Intersection 

geometry - other

$1794092 $1794092 HSIP (23 

U.S.C. 148)

Urban Local Road or 

Street

0 State 

Highway 

Agency

Spot Intersections

S-50 (New Market 

Street) MP 0.00 to 

MP 2.54 - 

Greenwood 

County

Roadway Roadway - other $744000 $744000 HSIP (23 

U.S.C. 148)

Urban Major Collector 0 State 

Highway 

Agency

Spot Roadway 

Departure
2022 South Carolina Highway Safety Improvement Program

Page 21 of 41

PROJECT NAME IMPROVEMENT 

CATEGORY SUBCATEGORY OUTPUTS OUTPUT TYPE

HSIP 

PROJECT 

COST($)

TOTAL 

PROJECT 

COST($)

FUNDING 

CATEGORY

LAND 

USE/AREA 

TYPE

FUNCTIONAL 

CLASSIFICATION AADT SPEED OWNERSHIP

METHOD 

FOR SITE 

SELECTION

SHSP 

EMPHASIS 

AREA

SHSP 

STRATEGY

S-278 (Mt 

Lebanon Church 

Road) MP 0.00 to 

MP 3.08 - 

Greenville County

Roadway Roadway - other $2215350 $2215350 HSIP (23 

U.S.C. 148)

Rural Major Collector 0 State 

Highway 

Agency

Spot Roadway 

Departure

S-52 (Piedmont 

Road) MP 0.997 

to MP 2.40 - 

Anderson County

Roadway Roadway - other $2037163 $2037163 HSIP (23 

U.S.C. 148)

Urban Local Road or 

Street

0 State 

Highway 

Agency

Spot Roadway 

Departure

S-53 (Old River 

Road) MP 0.00 to 

MP 3.92 - 

Anderson County

Roadway Roadway - other $817630 $817630 HSIP (23 

U.S.C. 148)

Urban Major Collector 0 State 

Highway 

Agency

Spot Roadway 

Departure

2023 Safety 

Transportation 

safety planning

Miscellaneous Transportation 

safety planning

$900000 $1000000 HSIP (23 

U.S.C. 148)

N/A N/A 0 State 

Highway 

Agency

Planning 

phase crash 

data analysis

Safety 

Program 

Admin.

Data is current as of 8/28/2022. The reporting period is FY2022. SCDOT projects obligating an additional $6,000,000 in HSIP funds prior to the end of the reporting period. 
2022 South Carolina Highway Safety Improvement Program

Page 22 of 41

Safety Performance

General Highway Safety Trends 

Present data showing the general highway safety trends in the State for the past five 

years.

PERFORMANCE 

MEASURES 2013 2014 2015 2016 2017 2018 2019 2020 2021

Fatalities 767 823 979 1,020 989 1,036 1,006 1,066 1,198

Serious Injuries 3,266 3,189 3,092 3,049 2,851 2,642 3,237 2,607 2,974

Fatality rate (per 

HMVMT)

1.570 1.650 1.890 1.870 1.780 1.820 1.740 1.980 2.080

Serious injury rate (per 

HMVMT)

6.670 6.900 5.980 5.590 5.140 4.650 5.590 4.840 5.170

Number non-motorized 

fatalities

119 121 141 173 172 190 192 203 214

Number of nonmotorized serious 

injuries

211 214 205 239 258 249 266 260 285
2022 South Carolina Highway Safety Improvement Program

Page 23 of 41

0

200

400

600

800

1000

1200

1400

2013 2014 2015 2016 2017 2018 2019 2020 2021

Annual Fatalities

Fatalities 5 Year Rolling Avg.

0

500

1000

1500

2000

2500

3000

3500

2013 2014 2015 2016 2017 2018 2019 2020 2021

Annual Serious Injuries

Serious Injuries 5 Year Rolling Avg.
2022 South Carolina Highway Safety Improvement Program

Page 24 of 41

0

0.5

1

1.5

2

2.5

2013 2014 2015 2016 2017 2018 2019 2020 2021

Fatality rate (per HMVMT)

Fatality rate (per HMVMT) 5 Year Rolling Avg.

0

1

2

3

4

5

6

7

8

2013 2014 2015 2016 2017 2018 2019 2020 2021

Serious injury rate (per HMVMT)

Serious injury rate (per HMVMT) 5 Year Rolling Avg.
2022 South Carolina Highway Safety Improvement Program

Page 25 of 41

Updates to previous years were included to reflect the most recent performance measure data available. 

Describe fatality data source. 

State Motor Vehicle Crash Database

To the maximum extent possible, present this data by functional classification and 

ownership. 

Year 2021

Functional 

Classification

Number of Fatalities

(5-yr avg)

Number of Serious 

Injuries

(5-yr avg)

Fatality Rate

(per HMVMT)

(5-yr avg)

Serious Injury Rate

 (per HMVMT)

(5-yr avg)

Rural Principal 

Arterial (RPA) - 

Interstate

74 118.6 0.89 1.43

Rural Principal 

Arterial (RPA) - Other 

Freeways and 

Expressways

2.2 3.6 0.69 1.14

Rural Principal 

Arterial (RPA) - Other

89.6 384.8 2.02 4.15

Rural Minor Arterial 129.6 259.8 3.01 6.02

Rural Minor Collector 13 29.2 4.82 10.92

Rural Major Collector 196.6 390.6 4.07 8.08

0

100

200

300

400

500

600

2013 2014 2015 2016 2017 2018 2019 2020 2021

Non Motorized Fatalities and Serious Injuries

Fatalities Serious Injuries 5 Year Rolling Avg.
2022 South Carolina Highway Safety Improvement Program

Page 26 of 41

Functional 

Classification

Number of Fatalities

(5-yr avg)

Number of Serious 

Injuries

(5-yr avg)

Fatality Rate

(per HMVMT)

(5-yr avg)

Serious Injury Rate

 (per HMVMT)

(5-yr avg)

Rural Local Road or 

Street

67.2 172.4 2.23 5.7

Urban Principal 

Arterial (UPA) - 

Interstate

51.6 118.6 0.67 1.54

Urban Principal 

Arterial (UPA) - Other 

Freeways and 

Expressways

8 24 0.95 2.82

Urban Principal 

Arterial (UPA) - Other

175.8 545.4 2.07 6.41

Urban Minor Arterial 120.6 432 1.68 6.02

Urban Minor Collector 0.6 2.8 0 6.91

Urban Major Collector 74.4 271.6 1.83 6.69

Urban Local Road or 

Street

38.6 188.6 1.52 7.43
2022 South Carolina Highway Safety Improvement Program

Page 27 of 41

Year 2021

Roadways Number of Fatalities

(5-yr avg)

Number of Serious 

Injuries

(5-yr avg)

Fatality Rate

(per HMVMT)

(5-yr avg)

Serious Injury Rate

 (per HMVMT)

(5-yr avg)

State Highway 

Agency

1,059 2,862.2 1.88 5.08

County Highway 

Agency

Town or Township 

Highway Agency

City or Municipal 

Highway Agency

State Park, Forest, or 

Reservation Agency

Local Park, Forest or 

Reservation Agency

Other State Agency

Other Local Agency

Private (Other than 

Railroad)

Railroad

State Toll Authority

Local Toll Authority

Other Public 

Instrumentality (e.g. 

Airport, School, 

University)

Indian Tribe Nation

Safety Performance Targets 

Safety Performance Targets 

Calendar Year 2023 Targets *

Number of Fatalities:1119.0

Describe the basis for established target, including how it supports SHSP goals.
2022 South Carolina Highway Safety Improvement Program

Page 28 of 41

The target of 1,119.0 traffic fatalities was established after thorough analysis of historic data and trend line 

projections. For this measure, a polynomial order 2 trend analysis was used to determine projected 2022 data, 

then using this projection the state was able to determine a reasonable target for the five year period ending in 

2023. By examining planned projects and current safety initiatives (in the fields of education, enforcement, and 

engineering), the state was able to calculate an expected decrease from the increasing trend in the number of 

traffic fatalities during calendar year 2023. This target supports the SHSP goal of reducing traffic fatalities in 

SC.

Number of Serious Injuries:2868.0

Describe the basis for established target, including how it supports SHSP goals.

A target of 2,868.0 serious injuries was established after thorough analysis of historic data and trend line 

projections. For this measure, a polynomial order 2 trend analysis was used to determine projected 2022 data, 

then using this projection the state was able to determine a reasonable target for the five year period ending in 

2023. By examining planned projects and current safety initiatives (in the fields of education, enforcement, and 

engineering), the state was able to calculate an expected decrease in from the increasing trend in the number 

serious injuries during calendar year 2023. This target supports the SHSP goal of reducing serious injuries that 

resulted from a traffic collision.

Fatality Rate:1.940

Describe the basis for established target, including how it supports SHSP goals.

The target of 1.940 as the fatality rate was established by using the projected fatality number in 2023 along 

with an expected 2% increase in vehicle miles traveled during that year. As part of the SHSP, reducing the 

fatality rate remains a valuable target for the state.

Serious Injury Rate:4.960

Describe the basis for established target, including how it supports SHSP goals.

The target of 4.960 as the serious injury rate was established by using the projected serious injury number in 

2023 along with an expected 2% increase in vehicle miles traveled during that year. As part of the SHSP, 

reducing the serious injury rate remains a valuable target for the state.

Total Number of Non-Motorized Fatalities and Serious Injuries:485.0

Describe the basis for established target, including how it supports SHSP goals.

The target of 485.0 non-motorized fatalities and serious injuries was established after thorough analysis of 

historic data and trend line projections. For this measure, a polynomial order 2 trend analysis was used to 

determine projected 2022 data, then using this projection the state was able to determine a reasonable target 

for the five year period ending in 2023. By examining planned projects and current safety initiatives (in the 

fields of education, enforcement, and engineering), the state was able to calculate an expected decrease in the 

decreasing trend in the number in fatalities and serious injuries involving pedestrians and bicyclists during 

calendar year 2023.
2022 South Carolina Highway Safety Improvement Program

Page 29 of 41

Describe efforts to coordinate with other stakeholders (e.g. MPOs, SHSO) to establish 

safety performance targets. 

South Carolina established a coordinating group comprised of highway safety professionals from the SC 

Department of Transportation (SCDOT) and the SC Department of Public Safety, which houses the State 

Highway Safety Office. This group meets to discuss the historical and current trends as well as projections 

related to the five safety performance areas.

Staff from SCDOT is available to provide any information related to the safety targets, including baseline data, 

to all MPOs. Additionally the SCDOT Planning Office distributes individual MPO baseline data to all MPOs for 

their information. Statewide baseline and targets are also provided to MPOs.

Does the State want to report additional optional targets? 

No

Describe progress toward meeting the State’s 2022 Safety Performance Targets (based 

on data available at the time of reporting). For each target, include a discussion of any 

reasons for differences in the actual outcomes and targets.

PERFORMANCE MEASURES TARGETS ACTUALS

Number of Fatalities 1005.0 1059.0

Number of Serious Injuries 2950.0 2862.2

Fatality Rate 1.760 1.880

Serious Injury Rate 5.350 5.078

Non-Motorized Fatalities and 

Serious Injuries

440.0 457.8

The South Carolina Department of Transportation along with the office of Traffic Safety, the HSIP office, and all 

other offices and partners continue to strive towards the goal of reducing all crashes with a focused emphasis 

on reducing fatal and serious injury crashes for all roadway users. From the currently available data, the state 

exceeded two of the five targets. The state continues to review and assess the current data and resources 

available to guide not only project level decisions, but also policy guidance and systemic countermeasures 

statewide. Additionally, as of the writing of this report, the state along with national partners are reviewing what 

effects of the Covid-19 pandemic and subsequent lockdowns and eventual re-opening of schools, businesses, 

and government offices had on travel demand, crashes and crash rates. 

Regarding Safety Performance Targets not met:

Number of Fatalities and Fatality Rate; The state continues to focus 100% of the apportioned amounts of HSIP 

funds towards projects and programs that use both crash data and injury severity to guide funding allocations 

for project locations, rankings, and countermeasures. Additionally, the state continues to provide state funding 

for its Rural Road Safety projects to aid in preventing rural run-off the road crashes which statistically have 

high rates of fatal and serious injuries. 

Non-Motorized Fatalities and Serious Injuries; As a part of the 2020 SHSP guidance, a statewide Pedestrian 

and Bicycle Safety Action Plan (PBSAP) was written and adopted by the SCDOT. As a part of the final report, 

two lists were created. One was a list of potential project locations based on bike and pedestrian crash history. 
2022 South Carolina Highway Safety Improvement Program

Page 30 of 41

The other is a list of locations based on the roadway characteristics of crash locations that allows the state to 

rank roadways for potential systemic improvements based on those roadway characteristics that were more 

often present in previous bike or pedestrian crashes. These lists are guiding the HSIP office for future project 

locations, and this information is also available for use by MPO, COGs, and County government for their 

consideration of local vulnerable roadway user projects. The first round of Roadway Safety Audits for locations 

identified from the PBSAP are currently in the scoping process and scheduled to be started in the fall of 2022. 

Applicability of Special Rules

Does the HRRR special rule apply to the State for this reporting period? 

No

Provide the number of older driver and pedestrian fatalities and serious injuries 65 

years of age and older for the past seven years.

PERFORMANCE 

MEASURES 2015 2016 2017 2018 2019 2020 2021

Number of Older Driver 

and Pedestrian Fatalities

104 112 133 148 128 135 144

Number of Older Driver 

and Pedestrian Serious 

Injuries

220 221 215 23 261 206 238
2022 South Carolina Highway Safety Improvement Program

Page 31 of 41

Evaluation

Program Effectiveness 

How does the State measure effectiveness of the HSIP? 

• Benefit/Cost Ratio 

• Change in fatalities and serious injuries 

Based on the measures of effectiveness selected previously, describe the results of 

the State's program level evaluations. 

Based on an evaluation of projects with at least 3 years of crash data available after completion, the state has 

averaged a B/C ratio of 5.7 from these locations evaluated. 

In addition to the B/C ratio, the state has achieved a 34.7% reduction in all F&SI crashes at the same project 

locations evaluated. 

What other indicators of success does the State use to demonstrate effectiveness and 

success of the Highway Safety Improvement Program? 

• # RSAs completed 

• HSIP Obligations 

• Increased awareness of safety and data-driven process 

• Other-Increased use of alternative intersections statewide 

Effectiveness of Groupings or Similar Types of Improvements 

Present and describe trends in SHSP emphasis area performance measures. 

Year 2021

SHSP Emphasis Area Targeted Crash 

Type

Number of 

Fatalities

(5-yr avg)

Number of 

Serious 

Injuries

(5-yr avg)

Fatality Rate

 (per HMVMT)

(5-yr avg)

Serious Injury 

Rate

 (per HMVMT)

(5-yr avg)

Young Driver (Age 15-

24)

299.8 965.4 0.53 1.71

Mature Driver (Age 65+) 223.8 542 0.4 0.96

Aggressive Driving 498.2 1,489 0.89 2.64

Impaired Driving 344.8 501.8 0.61 0.89

Distracted 54.4 306.8 0.23 0.63

Unbelted 344.8 518.8 0.61 0.92

Pedestrian 172.2 206.4 0.31 0.37
2022 South Carolina Highway Safety Improvement Program

Page 32 of 41

SHSP Emphasis Area Targeted Crash 

Type

Number of 

Fatalities

(5-yr avg)

Number of 

Serious 

Injuries

(5-yr avg)

Fatality Rate

 (per HMVMT)

(5-yr avg)

Serious Injury 

Rate

 (per HMVMT)

(5-yr avg)

Bicycle 20.2 49.4 0.04 0.09

Motorcycle 123.4 386.8 0.22 0.69

Heavy Truck 83.6 117.2 0.15 0.21

Train 1.6 3 0 0.01

Roadway Departure 431.2 1,106.4 0.77 1.96

Fixed Object 495.8 1,168.6 0.88 2.07

Intersection 211.2 839 0.38 1.49

Work Zone 16.6 34.4 0.03 0.06
2022 South Carolina Highway Safety Improvement Program

Page 33 of 41

0

100

200

300

400

500

600

Fatalities

Number of Fatalities 

5 Year Average

2013-2017 2014-2018 2015-2019 2016-2020 2017-2021

0

500

1000

1500

2000

2500

Serious Injuries

Number of Serious Injuries 

5 Year Average

2013-2017 2014-2018 2015-2019 2016-2020 2017-2021
2022 South Carolina Highway Safety Improvement Program

Page 34 of 41

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

Fatality Rate

Fatality Rate (per HMVMT) 

5 Year Average

2013-2017 2014-2018 2015-2019 2016-2020 2017-2021

0

0.5

1

1.5

2

2.5

3

3.5

4

Serious Injury Rate

Serious Injury Rate (per HMVMT) 

5 Year Average

2013-2017 2014-2018 2015-2019 2016-2020 2017-2021
2022 South Carolina Highway Safety Improvement Program

Page 35 of 41

Project Effectiveness 

Provide the following information for previously implemented projects that the State evaluated this reporting period. 

LOCATION FUNCTIONAL 

CLASS

IMPROVEMENT 

CATEGORY

IMPROVEMENT 

TYPE

PDO

BEFORE

PDO

AFTER

FATALITY

BEFORE

FATALITY

AFTER

SERIOUS 

INJURY

BEFORE

SERIOUS 

INJURY

AFTER

ALL OTHER 

INJURY

BEFORE

ALL OTHER 

INJURY

AFTER

TOTAL

BEFORE

TOTAL

AFTER

EVALUATION 

RESULTS

(BENEFIT/COST 

RATIO)

S-1121 & L5157 & L-6153Urban Minor 

Arterial

Intersection 

traffic control

Modify control – 

Modern 

Roundabout

15.00 15.00 6.00 6.00 21.00 21.00 -2.21

SC 6 & S-627 Rural Minor 

Arterial

Advanced 

technology and 

ITS

Intersection 

Conflict Warning 

System (ICWS)

19.00 5.00 8.00 5.00 27.00 10.00 2.01

US 521 & S1342Urban 

Principal 

Arterial (UPA) - 

Other

Intersection 

geometry

Intersection 

geometry - other

10.00 16.00 1.00 5.00 6.00 15.00 23.00 -2.71

SC 38 & S-329 Urban Minor 

Arterial

Intersection 

traffic control

Modify control – 

Modern 

Roundabout

9.00 2.00 5.00 14.00 2.00 1.72

US 78 & S-22 Rural Principal 

Arterial (RPA) - 

Other

Intersection 

traffic control

Modify control – 

new traffic signal

13.00 4.00 1.00 3.00 5.00 7.00 22.00 11.00 42.03

SC 9 & S-36 Rural Major 

Collector

Intersection 

geometry

Add/modify 

auxiliary lanes

11.00 11.00 8.00 22.00 8.00 1.64

S-920 & Old 

Greer Town 

RD

Urban Minor 

Arterial

Roadway Roadway 

widening - curve

8.00 2.00 1.00 2.00 9.00 4.00 1.36

SC 72 MP 0 - 

26.65

Rural Principal 

Arterial (RPA) - 

Other

Roadway Roadway - other 104.00 126.00 2.00 3.00 9.00 8.00 62.00 65.00 177.00 202.00 -8.52

SC 99 MP 2.5 

- 3.5

Rural Major 

Collector

Roadway Roadway - other 1.00 7.00 3.00 1.00 1.00 5.00 8.00 -81.72

S-60 MP 0 -

3.76

Rural Major 

Collector

Roadway Roadway - other 11.00 10.00 3.00 1.00 3.00 6.00 17.00 17.00 0.00

S-159 MP 0 - 

2.64

Rural Major 

Collector

Roadway Roadway - other 13.00 13.00 1.00 4.00 2.00 17.00 16.00 0.19

S-14 MP 1.45 - 

10.08

Rural Major 

Collector

Roadway Roadway - other 38.00 47.00 3.00 4.00 3.00 27.00 27.00 69.00 80.00 -5.10

S-20 MP 0 - 

4.16

Rural Major 

Collector

Roadway Roadway - other 14.00 12.00 1.00 1.00 9.00 7.00 24.00 20.00 1.75

S-198 MP 1.65 

- 2.95

Rural Major 

Collector

Roadway Roadway - other 4.00 6.00 1.00 1.00 6.00 11.00 7.00 60.94
2022 South Carolina Highway Safety Improvement Program

Page 36 of 41

LOCATION FUNCTIONAL 

CLASS

IMPROVEMENT 

CATEGORY

IMPROVEMENT 

TYPE

PDO

BEFORE

PDO

AFTER

FATALITY

BEFORE

FATALITY

AFTER

SERIOUS 

INJURY

BEFORE

SERIOUS 

INJURY

AFTER

ALL OTHER 

INJURY

BEFORE

ALL OTHER 

INJURY

AFTER

TOTAL

BEFORE

TOTAL

AFTER

EVALUATION 

RESULTS

(BENEFIT/COST 

RATIO)

SC 70 MP 0 - 

10.01

Rural Minor 

Arterial

Roadway Roadway - other 41.00 36.00 1.00 3.00 1.00 16.00 23.00 61.00 60.00 0.39

S-367 MP 0 - 

3.38

Rural Major 

Collector

Roadway Roadway - other 8.00 10.00 1.00 3.00 4.00 4.00 15.00 15.00 0.00

S-270 MP 0 - 

1.91

Rural Major 

Collector

Roadway Roadway - other 8.00 2.00 1.00 3.00 2.00 11.00 5.00 3.13

S-162 MP 3.27 

- 6.4

Rural Local 

Road or Street

Roadway Roadway - other 16.00 10.00 3.00 1.00 19.00 11.00 6.58

S-49 MP 0 - 

9.2

Rural Major 

Collector

Roadway Roadway - other 26.00 23.00 2.00 2.00 3.00 21.00 16.00 51.00 42.00 29.34

S-12 MP 1.64 - 

3.84

Rural Major 

Collector

Roadway Roadway - other 8.00 10.00 1.00 3.00 2.00 12.00 12.00 0.00

S-20 MP 0 -

1.88

Rural Local 

Road or Street

Roadway Roadway - other 6.00 5.00 1.00 5.00 12.00 5.00 38.44

S-543 MP 1.27 

- 4.36

Rural Major 

Collector

Roadway Roadway - other 18.00 10.00 1.00 3.00 2.00 15.00 6.00 37.00 18.00 48.65

S-132 MP 0 - 

3.96

Rural Major 

Collector

Roadway Roadway - other 9.00 8.00 1.00 2.00 1.00 6.00 3.00 17.00 13.00 3.11

S-356 MP 0 - 

2.53

Rural Local 

Road or Street

Roadway Roadway - other 5.00 6.00 1.00 1.00 2.00 3.00 9.00 9.00 0.00

S-537 MP 0 - 

4.08

Rural Local 

Road or Street

Roadway Roadway - other 8.00 7.00 6.00 5.00 14.00 12.00 1.53
2022 South Carolina Highway Safety Improvement Program

Page 37 of 41

Compliance Assessment

What date was the State’s current SHSP approved by the Governor or designated State representative? 

 12/09/2020

What are the years being covered by the current SHSP? 

From: 2020 To: 2024

When does the State anticipate completing it’s next SHSP update? 

 2025

Provide the current status (percent complete) of MIRE fundamental data elements collection efforts using the table below. 

*Based on Functional Classification (MIRE 1.0 Element Number) [MIRE 2.0 Element Number]

ROAD TYPE *MIRE NAME (MIRE 

NO.)

NON LOCAL PAVED

ROADS - SEGMENT

NON LOCAL PAVED

ROADS - INTERSECTION

NON LOCAL PAVED

ROADS - RAMPS LOCAL PAVED ROADS UNPAVED ROADS

STATE NON-STATE STATE NON-STATE STATE NON-STATE STATE NON-STATE STATE NON-STATE

ROADWAY SEGMENT Segment Identifier 

(12) [12]

100 100 100 95 100 95

Route Number (8) 

[8]

100 100

Route/Street Name 

(9) [9]

100 100

Federal Aid/Route 

Type (21) [21]

100 100

Rural/Urban 

Designation (20) [20]

100 100 100 95

Surface Type (23) 

[24]

100 100 100 95

Begin Point 

Segment Descriptor 

(10) [10]

100 100 100 95 100 95

End Point Segment 

Descriptor (11) [11]

100 100 100 95 100 95

Segment Length 

(13) [13]

100 100

Direction of 

Inventory (18) [18]

100 100

Functional Class 

(19) [19]

100 100 100 95 100 95
2022 South Carolina Highway Safety Improvement Program

Page 38 of 41

ROAD TYPE *MIRE NAME (MIRE 

NO.)

NON LOCAL PAVED

ROADS - SEGMENT

NON LOCAL PAVED

ROADS - INTERSECTION

NON LOCAL PAVED

ROADS - RAMPS LOCAL PAVED ROADS UNPAVED ROADS

STATE NON-STATE STATE NON-STATE STATE NON-STATE STATE NON-STATE STATE NON-STATE

Median Type (54) 

[55]

100 100

Access Control (22) 

[23]

100 100

One/Two Way 

Operations (91) [93]

100 100

Number of Through 

Lanes (31) [32]

100 100 100 95

Average Annual 

Daily Traffic (79) [81]

100 100 100 95

AADT Year (80) [82] 100 100

Type of 

Governmental 

Ownership (4) [4]

100 100 100 95 100 95

INTERSECTION Unique Junction 

Identifier (120) [110]

100 95

Location Identifier 

for Road 1 Crossing 

Point (122) [112]

100 95

Location Identifier 

for Road 2 Crossing 

Point (123) [113]

100 95

Intersection/Junction 

Geometry (126) 

[116]

Intersection/Junction 

Traffic Control (131) 

[131]

AADT for Each 

Intersecting Road 

(79) [81]

100 100

AADT Year (80) [82] 100 100

Unique Approach 

Identifier (139) [129]

100 100

INTERCHANGE/RAMP Unique Interchange 

Identifier (178) [168]

100 100

Location Identifier 

for Roadway at 

100 100
2022 South Carolina Highway Safety Improvement Program

Page 39 of 41

ROAD TYPE *MIRE NAME (MIRE 

NO.)

NON LOCAL PAVED

ROADS - SEGMENT

NON LOCAL PAVED

ROADS - INTERSECTION

NON LOCAL PAVED

ROADS - RAMPS LOCAL PAVED ROADS UNPAVED ROADS

STATE NON-STATE STATE NON-STATE STATE NON-STATE STATE NON-STATE STATE NON-STATE

Beginning of Ramp 

Terminal (197) [187]

Location Identifier 

for Roadway at 

Ending Ramp 

Terminal (201) [191]

100 100

Ramp Length (187) 

[177]

100 100

Roadway Type at 

Beginning of Ramp 

Terminal (195) [185]

100 100

Roadway Type at 

End Ramp Terminal 

(199) [189]

100 100

Interchange Type 

(182) [172]

100 100

Ramp AADT (191) 

[181]

95 95

Year of Ramp AADT 

(192) [182]

95 95

Functional Class 

(19) [19]

100 100

Type of 

Governmental 

Ownership (4) [4]

100 100

Totals (Average Percent Complete): 100.00 100.00 75.00 73.13 99.09 99.09 100.00 95.00 100.00 95.00

*Based on Functional Classification (MIRE 1.0 Element Number) [MIRE 2.0 Element Number]

Describe actions the State will take moving forward to meet the requirement to have complete access to the MIRE fundamental data elements on all public roads by September 30, 2026. 

States are required to have access to a complete collection of Model Inventory of Roadway Elements (MIRE) fundamental data elements (FDE) on all public roads by September 30, 2026. Of the 33 unique MIRE FDE identified, the South 

Carolina Department of Transportation currently has access to 91%, missing only three elements: Median Type, Intersection/Junction Geometry, and Intersection/Junction Traffic Control. 

The SCDOT Traffic Safety Office and Roadway Inventory Division have been working together to prioritize the collection of the remaining MIRE FDE elements and also to identify collection methods. The most efficient method will be to 

utilize the contracting services of company that is familiar with this type of data collection effort. The state anticipates opening a solicitation for proposals in 2022.
2022 South Carolina Highway Safety Improvement Program

Page 40 of 41

Optional Attachments

Program Structure:

ED-71 Safety Intersection Project Prioritization Process.pdf

ED-72 Rural Road Safety Project Prioritization Process for.pdf

ED-73-Interstate Safety project selection- 25JUL18.pdf

ED-74-Road Safety Assessment (RSA) project selection- 25JUL18.pdf

ED-75 Non-motorized user safety project selection - 25JUL18.pdf

Project Implementation:

Safety Performance:

Evaluation:

Compliance Assessment:
2022 South Carolina Highway Safety Improvement Program

Page 41 of 41

Glossary

5 year rolling average: means the average of five individuals, 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.

Systematic: refers to an approach where an agency deploys countermeasures at all locations across 

a system.

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.