Improved Prediction Models for Crash Types and Crash Severities

The objectives of this research were to develop: - Crash severity and crash type SPFs or distributions or both that can be used in the estimation of the crash type and crash severity likely on the facility types contained or intended for use in the HSM; - Recommendations of how the research results can be incorporated into the HSM and associated tools, including the development of associated chapters or chapter content in AASHTO standard format for the HSM second edition and recommended procedures for consistent use of crash severity and crash type SPFs or distributions or both; and - A description of the statistical and practical advantages and disadvantages of the methodology developed in the research and potential barriers to implementation. This research was to provide a consistent approach for developing and validating crash severity and crash type prediction models to improve the capabilities of the current HSM and associated tools to estimate the safety performance outcomes associated with modifications to the highway and road user environments. STATUS: Research is complete. The final report is available as a web-only document at


  • English


  • Status: Completed
  • Funding: $800000
  • Contract Numbers:

    Project 17-62

  • Sponsor Organizations:

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590

    American Association of State Highway & Transportation Officials (AASHTO)

    444 North Capitol Street, NW, Suite 225
    Washington, DC  United States  20001

    National Cooperative Highway Research Program

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC  United States  20001
  • Project Managers:

    Bush, Mark

  • Performing Organizations:

    University of Connecticut, Storrs

    Storrs, CT  United States  06268-5202
  • Principal Investigators:

    Ivan, John

  • Start Date: 20130702
  • Expected Completion Date: 20171231
  • Actual Completion Date: 20171231
  • Source Data: RiP Project 37828

Subject/Index Terms

Filing Info

  • Accession Number: 01543916
  • Record Type: Research project
  • Source Agency: Transportation Research Board
  • Contract Numbers: Project 17-62
  • Files: TRB, RIP
  • Created Date: Nov 23 2014 1:01AM