Study Details

Study Title: Safety and Economic Evaluation of the Highway Safety Improvement Program: Is there a Return on Investment?

Authors: Boris Claros, Erynn Schroeder, Kentin Brummett, Madhav Chitturi, Andrea Bill, and David A. Noyce

Publication Date: JAN, 2022

Abstract: The Highway Safety Improvement Program (HSIP) is a Federal-aid program aimed at achieving a significant reduction in traffic fatalities and serious injuries on all public roads. Projects are selected based on the potential reduction of severe crashes and the greatest return on investment. In this paper, a step-by-step process and methodology were developed to evaluate HSIP projects. The process and method were implemented to evaluate HSIP projects executed in Wisconsin between 2013 and 2019. Safety effectiveness evaluation and economic assessment were conducted using the Empirical Bayes (EB) method. Crash cost benefit of implemented projects was quantified to find the benefit–cost (B/C) for a horizon of 10 years and observed period of analysis. With data available from project evaluations, Crash Modification Factors (CMFs) for common treatments were developed. A total of 64 HSIP projects were evaluated. B/C ratios greater than one were observed in 43 projects. For a 10-year horizon, the aggregated B/C ratio was 2.71. Alternatively, using the observed data during the study period of each project, the observed overall crash cost benefit was equal to $72 million which corresponds to a B/C ratio of 1.10 (benefit already surpassed project costs at 3–5 years). Approximately 536 crashes were prevented which translates to seven lives saved, 380 injuries prevented, and avoided 1,067 property damage losses.

Study Citation: Claros, B., Schroeder, E., Brummett, K., Chitturi, M., Bill, A., & Noyce, D. A. “Safety and Economic Evaluation of the Highway Safety Improvement Program: Is there a Return on Investment? “. Transportation Research Record 2676, No.5, Transportation Research Board of the National Academies of Science, Washington, D.C., (2022).

Study Report: Download the Study Report Document


CMFs Associated With This Study

Category: Intersection geometry

Countermeasure: Conversion of intersection to roundabout

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
0.465 53.5 3 Stars All K,A,B,C Not specified Not specified
1.307 -30.7 2 Stars All O Not specified Not specified
0.962 3.8 2 Stars All All Not specified Not specified

Countermeasure: Install J-Turn intersection

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
0.288 71.2 3 Stars All K,A,B,C Not specified Not specified
0.7 30 3 Stars All All Not specified Not specified
0.958 4.2 2 Stars All O Not specified Not specified

Countermeasure: Provide Right Turn Channelization

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
0.616 38.4 3 Stars All K,A,B,C Not specified Not specified
0.786 21.4 2 Stars All O Not specified Not specified
0.734 26.6 3 Stars All All Not specified Not specified

Category:Roadside

Countermeasure: Cable Barrier and Guardrail

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
0.3 70 3 Stars All K,A,B,C Not specified Not specified
0.468 52 3 Stars All O Not specified Not specified
0.429 57.1 3 Stars All All Not specified Not specified