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New Approach to Setting Speed Limits to Improve Safety on Mountain Roads

Posted: Aug 30, 2022

University of Wyoming researchers developed a new system for setting speed limits on roadways that are characterized by steep downgrades and curves. They used high-fidelity dynamic simulation modeling to assess lateral and roll stability of different vehicle types on various road surface conditions. The study offered a holistic design framework for safe vehicle speeds with respect to lateral and roll stability, including vehicle configurations (weight/truck load height) and wind parameters (speed and direction). Their work provides guidelines regarding the design of road sections with steep grades and curves and for the implementation of safety countermeasures on existing curved roads.

Khaled Ksaibati, Ph.D.
University of Wyoming

Anas Alrejjal, GRA, Ph.D.
University of Wyoming

Amirarsalan Mehara Molan
University of Wyoming

Proposing New Advisory Speeds in Mountainous Areas Considering the Effect of Longitudinal Grades, Vehicle Characteristics, and the Weather Condition

NDSU Dept 2880P.O. Box 6050Fargo, ND 58108-6050