MPC
Project Details

Title:	Updating and Implementing the Grade Severity Rating System (GSRS) for Wyoming Mountain Passes
Principal Investigators:	Khaled Ksaibati and Dick T. Apronti
University:	University of Wyoming
Status:	Completed
Year:	2017
Grant #:	69A3551747108 (FAST Act)
Project #:	MPC-540
RH Display ID:	149203
Keywords:	braking, downgrades (roads), mountain roads, passes (mountains), trucks, warning systems

Abstract

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.

Project Deliverables

• [Final Report] Automating the Implementation of the Updated Grade Severity Rating System (GSRS) for Wyoming Mountain Passes — MPC-23-496
  • View Research Brief
• [Webinar] Updating and Implementing the Grade Severity Rating System (GSRS) for Wyoming — This MPC webinar, held November 20, 2019, focused on the need to update the GSRS, a system that recommends safe descent speeds for trucks on steep downgrades....

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