Related Experiment Video
Updated: Apr 20, 2026

Evaluating the Effect of Roadside Parking on a Dual-Direction Urban Street
Published on: January 20, 2023
Potential crash reduction benefits of shoulder rumble strips in two-lane rural highways
Mubassira Khan1, Ahmed Abdel-Rahim2, Christopher J Williams3
1The University of Texas at Austin, Dept of Civil, Architectural and Environmental Engineering, 301 E. Dean Keeton St. Stop C1761, ECJ Hall, Suite 6.9, Austin TX 78712-1172, USA.
Abstract:
This paper reports the findings from a study aimed at examining the effectiveness of shoulder rumble strips in reducing run-off-the-road (ROR) crashes on two-lane rural highways using the empirical Bayes (EB) before-and-after analysis method. Specifically, the study analyzed the effects of traffic volume, roadway geometry and paved right shoulder width on the effectiveness of shoulder rumble strips. The results of this study demonstrate the safety benefits of shoulder rumble strips in reducing the ROR crashes on two-lane rural highways using the state of Idaho 2001-2009 crash data. This study revealed a 14% reduction in all ROR crashes after the installation of shoulder rumble strips on 178.63miles of two-lane rural highways in Idaho. The results indicate that shoulder rumble strips were most effective on roads with relatively moderate curvature and right paved shoulder width of 3 feet and more.
Related Concept Videos
Sight Distance in a Vertical Curve
Survey Safety
Social Traps
Design Example: Alignment of a Road Line Using GIS
Rolling Resistance: Problem Solving
Introduction to Vertical Curves

