Development of Crash Modification Factors for the District of Columbia

The appropriate selection of cost-effective countermeasures for highway safety improvement projects requires an estimate of the safety effects of alternative designs. The District Department of Transportation (DDOT), like many agencies, makes these estimates using crash reduction factors (CRFs). Identification and implementation of countermeasures are keys to safety improvement planning. The estimated economic benefits clearly depend on expected crash reductions from each countermeasure, yet these projections are considered the least certain element of the safety improvement planning process. These projections are called crash reduction factors (CRFs) and are estimates of the expected reduction in different crash types following the implementation of a particular countermeasure. Most states have compiled their lists of CRFs from the literature coupled with evaluations of their own projects, through the conduct of statistically valid studies of these countermeasures. Currently, DDOT relies on the national CRF values, which may or may not address local experience and impact from countermeasure implementations. This research is therefore aimed at developing a complete CRF list specifically for the District of Columbia, based on data on countermeasure implementations and projects.

  • Supplemental Notes:
    • Projet cancelled due to data issues.


  • English


  • Status: Terminated
  • Funding: $118745.00
  • Sponsor Organizations:

    District of Columbia Department of Transportation

    250 M Street, SE
    Washington, DC  United States  20003
  • Performing Organizations:

    Howard University

    Transportation Research Center
    2366 Sixth Street, NW
    Washington, DC  United States  20059
  • Start Date: 20111001
  • Expected Completion Date: 0
  • Actual Completion Date: 0
  • Source Data: RiP Project 31841

Subject/Index Terms

Filing Info

  • Accession Number: 01467324
  • Record Type: Research project
  • Source Agency: District of Columbia Department of Transportation
  • Files: RIP, STATEDOT
  • Created Date: Jan 3 2013 3:31PM