2013 Highway Safety Improvement 

Program Report

Traffic Engineering Division

Safety Section
Mississippi Department of Transportation

Federal FY 2013 Highway Safety Improvement Program 

Introduction

The Mississippi Department of Transportation (MDOT) is responsible for providing a safe 

intermodal transportation network that is planned, designed, constructed, and 

maintained in an effective, cost efficient, and environmentally sensitive manner. 

As stated in the mission statement, safety is at the forefront of the MDOT’s short and 

long range plans. Providing the safest and most efficient transportation facilities

possible are of critical importance to the MDOT. The primary “measuring stick” for 

safety in Mississippi is the reduction in the number of fatalities and serious injuries that 

result from motor vehicle crashes each year. The MDOT has an extensive safety 

program that aims to ensure that the transportation facilities are as safe as possible,

from the initial planning phase through the usable life of the facility.

Purpose

The Safe, Accountable, Flexible, and Efficient Transportation Equity Act: A Legacy for 

Users (SAFETEA-LU) established the Highway Safety Improvement Program (HSIP) as a

Federal Highway Administration (FHWA) “core” program with dedicated funding for 

infrastructure-related highway safety improvement projects. The requirements for this 

program were established in Section 148 of Title 23, United States Code (USC). 

In 2012, Congress passed a new transportation re-authorization bill, the Moving Ahead 

for Progress in the 21st Century Act (MAP-21). MAP-21 continued the HSIP as a core 

program, along with many of the previous requirements from SAFETEA-LU.

The HSIP is intended to implement safety improvement projects to reduce the number 

and severity of crashes at intersections or along sections of any public road with a 

proven history of substandard safety performance. Typical project types include: 

intersection improvements (i.e. channelization, traffic signals, or sight distance 

improvements); pavement and shoulder widening; guardrail and barrier improvements; 

installation of crash cushions; modification of roadway alignment, signing, pavement 

marking, and delineation; breakaway utility poles and sign supports; pavement grooving 

and skid-resistant overlays; shoulder rumble strips/stripes; and minor structure 

replacements or modifications.
Protection of Data from Discovery and Admission into Evidence

Section 148(g)(4) of 23 USC stipulates that data compiled or collected for the 

preparation of the HSIP Report “...shall not be subject to discovery or admitted into 

evidence in a Federal or State court proceeding or considered for other purposes in an 

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

such reports...” This information is also protected by 23 USC 409 (discovery and 

admission as evidence of certain reports and surveys).

Program Administration

The HSIP funds appropriated for Mississippi are administered centrally by the Traffic 

Engineering Division’s Safety Section with input and oversight from the MDOT 

administration. All HSIP funds are allocated based on safety need, regardless of 

geographic location or district boundary. Local roads (non-state owned) are also 

candidate locations which are analyzed and considered for safety improvement. Any 

HSIP project located within the boundary of a Metropolitan Planning Organization 

(MPO) is coordinated with all vested parties and placed on the Statewide Transportation 

Improvement Program (STIP) and the appropriate MPO’s Transportation Improvement 

Program (TIP).

Program Methodology

The MDOT’s Safety Section generates a list of HSIP candidate projects using the Safety 

Analysis Management System (SAMS). The SAMS provides locations with opportunity 

and established crash histories. Candidate locations are also identified from the 

MDOT’s six construction district offices, area traffic engineers, safety engineers, and 

other sources within the MDOT. Feedback from private citizens and law enforcement 

officers regarding specific locations are also used in the location identification process. 

Locations selected for HSIP funding go through rigorous statistical analysis prior to being 

selected. The programmed projects have, at a minimum, one of the following:

• Severity index above an acceptable level

• Elevated crash rate compared to homogenous locations

• Exceedingly high number of crashes, or

• Crashes conducive to producing fatalities or severe injuries.

Additionally, the MDOT is in the process of developing a scoring system to generate an 

initial ranking for candidate HSIP projects. This ranking system will place primary 

emphasis on the severity index, which will account for fifty percent of the total score. 

The location’s crash rate and the total number of crashes per year for intersections 

(crashes per year per mile for sections) will each count for twenty-five percent of the 

total score. Initial priorities will be given to the locations that receive the highest 

cumulative score.
The MDOT seeks to identify projects that can be tied back to the State of Mississippi’s 

Strategic Highway Safety Plan (SHSP). The SHSP was developed with various safety 

partners across Mississippi and was formally adopted in early 2007. The initial goal of 

the plan was to reduce the number of fatalities from the benchmark of 931 in 2005 to 

700 or fewer by 2011, a reduction of more than twenty-five percent. Mississippi saw 

success following the implementation of the SHSP and reports that Mississippi’s goal 

was achieved in 2009, two years before the targeted date.

Mississippi’s original SHSP identified five critical emphasis areas in which to focus its 

safety efforts. These five critical emphasis areas were: 

• Unbelted drivers

• Young drivers

• Aggressive drivers

• Impaired drivers

• Lane departure crashes

In early 2009, data analysis indicated that an additional critical emphasis area was 

needed. The need to add intersections as an emphasis area was discussed at the SHSP 

Executive Update Meeting in August 2009.

Currently, the 2nd Edition of the SHSP is being prepared for final acceptance. The Vision 

to the 2nd Edition of the Mississippi SHSP has been changed to reflect a Towards Zero 

Deaths (TZD) initiative. Even though the plan has not been finalized, data analysis has 

already indicated that the new emphasis areas will be:

• Unbelted drivers

• Impaired drivers

• Suspended/Revoked Licensed or Unlicensed drivers

• Lane departure crashes

• Intersection crashes

In addition to these data-driven emphasis areas, there are other areas in need of 

attention. It is widely recognized that distracted driving is becoming more of a problem 

across the United States. The extent of the problem in Mississippi is not yet known, as 

this information is difficult to accurately or legitimately collect once a crash has taken 

place. Without state-specific data, Mississippi will rely on the most recent data from the 

United States Department of Transportation to justify the addition of distracted driving.

Another area which needs continued focus and effort will be crash and road data

quality. The analysis of safety information can only be as good as the quality of data 

available. The process of data validation must be included in the SHSP as well.
Progress in Implementing the HSIP Projects

The MDOT was appropriated $31,367,440 in federal and Section 154 funding for the 

HSIP in Federal Fiscal Year (FFY) 2013. All 2013 HSIP funds have been obligated. In 

addition to the FFY 2013 funds, the MDOT re-obligated all HSIP funds that were released 

from completed projects in previous fiscal years. 

Attachment A contains a list of all 2013 HSIP projects. This list includes project-specific 

information such as project numbers, termini, scope, and cost. Additionally, this 

attachment contains, where feasible, the crash data and analytical results. Attachment 

B identifies the connection between the HSIP projects and the SHSP.

During Federal Fiscal Year 2013, almost three percent of all apportioned HSIP dollars 

was spent on an off-system project, which is listed in Attachment A. 

Application of Special Rule – High Risk Rural Roads

The new transportation re-authorization bill, MAP-21, which eliminated the High Risk 

Rural Roads set-aside program, stipulates that States track measures that relate to 

crashes occurring on Rural Roads. In the yearly HSIP Report, the state is required to 

report on fatal and serious crash trends occurring on rural roadways if the FHWA 

notifies the state that the High Risk Rural Road Special Rule applies. FHWA has not 

notified Mississippi that the Special Rule applies. 

Application of Special Rule – Older Drivers and Pedestrians

The new transportation re-authorization bill, MAP-21, stipulates that States track crash 

data relating to Older Drivers and Pedestrians, age 65 and over. Using data provided by 

the Fatality Analysis Reporting System (FARS) and Mississippi Department of Public 

Safety (MDPS), the information below is presented to determine the applicability.

2005 2006 2007 2008 2009 2010 2011

Fatalities1, Driver >=65 85 67 77 66 58 61 78

Ped Fatalities1 >= 65 8 8 6 11 7 4 7

SAMS Injury A2, Driver >=65 48 40 34 33 42 36 32

SAMS Ped Injury A2 >=65 6 4 4 4 0 2 3

K+A Total, Driver/Ped >=65 147 119 121 114 107 103 120

Mississippi Age 65 and Older

Population, Thousands 119 124 124 125 127 129 130

K+A Rate, Driver/Ped >=65 1.235 0.960 0.976 0.912 0.843 0.798 0.923

Moving Average K+A Rate 0.985 0.890

1 – Data from the Fatality Analysis Reporting System (FARS)

2 – Data from the Mississippi Department of Public Safety (MDPS)
Using the information provided in the guidance developed by the Federal Highway 

Administration (FHWA) entitled, Older Drivers and Pedestrians Special Rule Interim 

Guidance, and using the above table, Mississippi shows a decrease in the five-year 

moving average of the fatal and serious injury rate of drivers and pedestrians, aged 65 

and older. The five-year moving average decrease from the time period of 2005 – 2009 

to 2007 – 2011 represents a drop of 9.6% in the aforementioned rate. Henceforth, at 

this time, the Special Rule concerning Older Drivers and Pedestrians does not apply to 

the state of Mississippi.

Mississippi will continue to track the involvement of Older Drivers and Pedestrians in 

the upcoming years. If an uptick in fatalities and serious injuries to the older population 

does present itself, Mississippi will revise its Strategic Highway Safety Plan to involve 

mitigation strategies to prevent serious and fatal crashes involving older drivers.

HSIP Effectiveness

The overall safety trend in Mississippi over the last few years is very positive. The table 

below illustrates how the safety efforts across the state continue to influence the

primary safety indicators.

2006 2007 2008 2009 2010 2011 2012

Fatalities1 911 884 783 700 641 630 582

Fatality Rate 

(Fatalities/HMVMT) 2.20 2.04 1.79 1.73 1.61 1.61 1.51

Life Threatening Injury Crashes2 692 630 608 496 605 532 521

Moderate Injury Crashes2 6,579 6,218 5,441 4,572 4,833 4,535 4,304

Fatalities3

784 728 667

Fatality Rate3 - - - - 1.87 1.76 1.65

1 – Data from Fatality Analysis Reporting System (FARS) 2 – Data from Mississippi Department of Public Safety (MDPS) 3 – Five Year Moving Average

The number of traffic fatalities across Mississippi has steadily decreased since 2005. 

Both the total number of fatalities and the fatality rate have dropped thirty-six and 

thirty-one percent, respectively, since 2006. In 2012, Mississippi achieved a fatality rate 

of 1.51 fatalities per hundred million vehicle miles traveled (Fatalities/HMVMT). While 

the fatality rate is still above the national goal of 1.0 Fatalities/HMVMT, the overall 

reduction illustrates the progress of all the safety programs across our state.

Project Evaluation

There are fifty-four HSIP projects that have at least one year of post-construction crash 

data. Of these projects, reductions were achieved in both the average severity index 
and crash rate from the “pre-construction” period to the “post-construction” period. 

For the average severity index, a reduction of thirty-four percent was realized. This is a 

remarkable decrease and significant step toward the goal of reducing fatal and injuryproducing crashes in the state. A seventeen percent decrease was realized in the 

average crash rates when studying the same “before” and “after” periods.

When you break down the evaluation, we are able to get a clearer picture on the 

effectiveness of the HSIP projects. The following chart helps to illustrate this point for 

both similar projects and projects grouped by their emphasis area in the SHSP.

Before After %Reduction Before After %Reduction

Severity Index Crash Rate

All HSIP Projects 0.74 0.48 34 2.15 1.78 17

HSIP – Lane Departure 0.80 0.49 39 3.07 1.98 36

HSIP – Intersections 0.71 0.49 32 1.57 1.60 -2

Traffic Signal Projects 0.67 0.40 40 1.63 1.49 9

Cable Barrier Projects1 1.32 0.65 51 0.06 0.18 -182

1 – Data Only Looks at Head On and Run Off Road – Left Crashes

It can be noted that the crash rate has increased quite a bit for Cable Barrier Projects. 

This can be ascribed to two things. First, one jurisdiction did not report all crashes in the 

before period, which makes the pre-construction values under-reported. Second, the 

cable barrier does impose an obstruction in the clear zone. Prior to the median cable 

barrier being installed, a vehicle that was to enter the median would not have struck the 

cable barrier. Now, a vehicle that enters the median is more likely to strike the 

obstruction, requiring a crash report. While the crash rate did increase, the severity 

index of the crashes in the cable barrier sections decreased by over half.

All “Before” and “After” period analysis can be seen in Attachment C – 2013 Before and 

After. 

Summary

With the number of fatalities dropping for a seventh consecutive year, the success of 

the MDOT’s Safety Program is well illustrated. The sustained and steady decrease in the 

number of fatalities enabled Mississippi to reach the goal of 700 or fewer fatalities in 

the original SHSP two years in advance, with an overall reduction in traffic fatalities in 

Mississippi greater than thirty-seven percent since 2005.

HSIP project selection and countermeasure implementation successes can be seen by 

looking at reductions in both severity indices and crash rates, with reductions of thirtyfour and seventeen percent respectively for completed projects. 
In terms of fiscal responsibility, Mississippi continues to lead the nation in the successful 

utilization of HSIP funds available. This successful utilization allows Mississippi to 

increase and enhance the safety of the traveling public. 

While even one fatality is too many, the continued reduction in fatalities and serious 

injuries throughout 2012 has Mississippi well on its way to achieving our vision of no 

more fatalities on our roadways.