Updating and Implementing the Grade Severity Rating System (GSRS) for Wyoming Mountain Passes

The proposed study is aimed at achieving two main goals. First, the FHWA's GSRS model will be updated to reflect the current truck population characteristics. This will be achieved by carrying out field tests with an instrumented vehicle to update parameters in the model that reflect current truck characteristics and braking systems. The second objective of the study is to evaluate Wyoming mountain passes and their warning systems with regard to truck downgrade crashes. By doing this, the best means of communicating with truck drivers to reduce the probability of runaway truck incidences can be recommended.


  • English


  • Status: Completed
  • Funding: $194152
  • Contract Numbers:


  • Sponsor Organizations:

    Office of the Assistant Secretary for Research and Technology

    University Transportation Centers Program
    Department of Transportation
    Washington, DC  United States  20590
  • Managing Organizations:

    Mountain-Plains Consortium

    North Dakota State University
    Fargo, ND  United States  58108
  • Project Managers:

    Tolliver, Denver

  • Performing Organizations:

    University of Wyoming

    Dept. of Civil and Architectural Engineering
    1000 E. University Avenue
    Laramie, WY  United States  82071
  • Principal Investigators:

    Ksaibati, Khaled

    Apronti, Dick

  • Start Date: 20171102
  • Expected Completion Date: 20230731
  • Actual Completion Date: 20230502
  • USDOT Program: University Transportation Centers Program
  • Source Data: MPC-540

Subject/Index Terms

Filing Info

  • Accession Number: 01860467
  • Record Type: Research project
  • Source Agency: Mountain-Plains Consortium
  • Contract Numbers: 69A3551747108
  • Files: UTC, RIP
  • Created Date: Oct 5 2022 8:29AM