Crash Prediction Models for Alternative and Unconventional Intersections

In 2010, AASHTO published the first edition of the Highway Safety Manual (HSM). HSM Part C includes methods to assess the safety performance of existing highway facilities, predict the safety performance of new facilities, and estimate the change in safety performance for proposed improvements. The forthcoming second edition of the Highway Safety Manual (HSM-2) expands crash prediction models for analyzing safety performance to include additional intersection and facility types. However, not all intersection types are addressed in the HSM or HSM-2; intersection types not addressed include (1) Intersections with frontage roads, (2) Protected intersections, (3) Offset intersections, (4) Quadrant intersections, (5) Through-cut intersections, (6) Median U-turn intersections, (7) Jughandle intersections, (8) Continuous green tee intersections, (9) Rural five-leg intersections, and (10) Six-or-more-leg intersections. Research is needed to develop crash prediction models for additional intersection configurations and traffic control types that have not been previously studied for potential inclusion in future editions of the HSM. New crash prediction models need to be developed so comparisons can be made to the safety performance of intersection types in the latest edition of the HSM. The objective of this research is to develop crash prediction models that are compatible with existing methods in HSM Part C and include a range of intersection configurations and traffic control types. 


  • English


  • Status: Proposed
  • Funding: $750000
  • Contract Numbers:

    Project 17-26

  • Sponsor Organizations:

    National Cooperative Highway Research Program

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC  United States  20001

    American Association of State Highway and Transportation Officials (AASHTO)

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

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Project Managers:

    Turner, Anne-Marie

  • Start Date: 20240319
  • Expected Completion Date: 0
  • Actual Completion Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 01888638
  • Record Type: Research project
  • Source Agency: Transportation Research Board
  • Contract Numbers: Project 17-26
  • Files: TRB, RIP
  • Created Date: Jul 25 2023 8:12AM