U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
Federal Highway Administration Research and Technology
Coordinating, Developing, and Delivering Highway Transportation Innovations
The Federal Highway Administration (FHWA) Development of Crash Modification Factors (DCMF) program was established in 2012 to address highway safety research needs for evaluating new and innovative safety strategies (improvements) by developing reliable quantitative estimates of their effectiveness in reducing crashes.
The mission of the FHWA DCMF program is to save lives by identifying new safety strategies that effectively reduce crashes and promote the strategies for nationwide installation by providing measures of their safety effectiveness. State departments of transportation (DOTs) and other transportation agencies need to have objective measures for safety effectiveness before investing in new strategies for statewide safety improvements.
Statistical methodologies are heavily used for all studies performed under the DCMF program, but these methodologies have been borrowed from various statistical fields and have limitations in capability and applicability when used for highway safety research. Accordingly, the DCMF program is to advance highway safety evaluations and related research by establishing a sound foundation for the development of highway transportation-specific statistical methodologies in cooperation with the American Statistical Association (ASA) and other statistician communities.
There are 38 State DOTs that provide technical feedback on safety improvements to the DCMF program and implement new safety improvements to facilitate evaluations. These States are members of the Evaluation of Low Cost Safety Improvements Pooled Fund Study. The (ELCSI–PFS) functions under the DCMF program. The ELCSI–PFS was established by FHWA in 2004 to develop reliable estimates of the safety effectiveness of low-cost safety improvement strategies. The initial study included four phases, had 24 State participants, and evaluated 20 safety countermeasures in 5 years. Currently, this study has 38 member States and has evaluated more than 40 strategies. Under the DCMF program umbrella, the ELCSI–PFS will continue its evaluations through 2017.
Duration: The DCMF program is a comprehensive, long-term safety research effort. It started in November 2012 and will end in December 2017.
Goal: The goal of this effort is to identify CMF research needs, develop CMFs that meet the criteria for inclusion in the Highway Safety Manual (HSM), and promote installation of promising safety improvements (low, medium, and high cost) as standard practice and to facilitate developing practical guides for implementation. This study will also address methodological issues with the development, application, and assessment of the quality of CMFs.
Objective: The DCMF program will:
Data Resources: The following national data resources may be used to conduct DCMF studies.
Methodology: The methodology used for each study will be determined by teams of statisticians working with DCMF.
Research Product: The final result of the DCMF program will be published by FHWA, and also will serve as a resource for the HSM and other technical publications.
For more information, contact:
Roya Amjadi, Research Highway Safety Specialist
Federal Highway Administration.
Office of Safety Research and Development
6300 Georgetown Pike, McLean, VA 22101
Phone: 202–493–3383, Fax: 202–493–3374