Updating and Implementing the Grade Severity Rating System (GSRS) for Wyoming Mountain Passes [Volume 1]

Moomen, Milhan; Apronti, Dick T.; Molan, Amirarsalan Mehara; Ksaibati, Khaled

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Updating and Implementing the Grade Severity Rating System (GSRS) for Wyoming Mountain Passes [Volume 1]

2018-12-01
By Moomen, Milhan ; Apronti, Dick T. ; Molan, Amirarsalan Mehara

File Language:

English

Details

Creators:

Moomen, Milhan ; Apronti, Dick T. ; Molan, Amirarsalan Mehara ; Ksaibati, Khaled
Corporate Creators:

University of Wyoming. Department of Civil and Architectural Engineering ; Wyoming Technology Transfer Center
Corporate Contributors:

Wyoming. Department of Transportation
Subject/TRT Terms:
Publication/ Report Number:

WY-1901F
Resource Type:

Tech Report
Geographical Coverage:

United States;Wyoming
Edition:

Final Report
Corporate Publisher:

Wyoming. Department of Transportation
Abstract:

The State of Wyoming like other western States is characterized by steep downgrades on mountainous highways. Such difficult terrain presents considerable crash risks to truck drivers inexperienced or unfamiliar with the landscape. Truck crashes on Wyoming mountain passes have been a cause for concern due to their devastating effect on lives and property. A major contributory factor to such truck crashes is brake failure. The risk of truck brake failure on downgrades is high due to the large amounts of heat energy generated during braking activity in such a difficult geometry. The Grade Severity Rating System (GSRS) was developed in the early 1980s to enhance truck safety on downgrades by recommending maximum safe descent speeds through Weight Specific Speed (WSS) signs. However, truck designs, brake and engine characteristics have changed during the intervening decades. This study updated the GSRS model to reflect current truck population characteristics. The updated GSRS model will engender driver compliance and confidence in the new recommended speeds, thereby improving mountain pass safety in Wyoming.
Format:

PDF
Funding:

RS08(216)
Download URL:

https://rosap.ntl.bts.gov/view/dot/42490/dot_42490_DS1.pdf
File Type:

[PDF - 6.52 MB]
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha-512:9a84dd01a2791be1e76f4a6fc3966652cd02005a717edb009f0fe1e1c24836ee5fb55406f472478ff5ac27fd09920a08f5df1c39ba5c23d6fb831ad343c59d2f

File Language:

English

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