Study Details

Study Title: Performance Analysis of Centerline and Shoulder Rumble Strips Installed in Combination in Washington State

Authors: D. Olson, M. Sujka, and B. Manchas

Publication Date: APR, 2013

Abstract: WSDOT began installing rumble strips on undivided highways in 1999 as a countermeasure for roadway departure crashes. Installations on the shoulders were intended to reduce run-off-the-road crashes, while centerline rumble strips targeted reductions in cross-centerline crashes. A March 2011 report detailed the performance of centerline rumble strips on Washington State highways. This study: - Examines the combined effects of centerline and shoulder rumble strips. - Details the performance of rumble strips on undivided highways in Washington State under a variety of conditions. - Explores various traffic volumes, geometric conditions, lane and shoulder widths, and driver contributing circumstances. - Compares various installation scenarios with shoulder and centerline rumble strip installation at different times, as well as simultaneous installation.

Study Citation: Olson, D., M. Sujka, and B. Manchas. "Performance Analysis of Centerline and Shoulder Rumble Strips Installed in Combination in Washington State". Washington State Department of Transportation, Office of Research and Library Services, WA-RD 799.1, April 2013.

Study Report: Download the Study Report Document


CMFs Associated With This Study

Category: Roadway

Countermeasure: Install centerline and shoulder rumble strips

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
0.34 66 3 Stars Head on,Run off road,Sideswipe All Not specified Rural
0.44 56 2 Stars Head on,Run off road,Sideswipe K,A Not specified Rural
0.29 71 3 Stars Head on,Sideswipe All Not specified Rural
0.425 57.5 2 Stars Head on,Sideswipe K,A Not specified Rural
0.384 61.6 3 Stars Run off road All Not specified Rural
0.463 53.7 2 Stars Run off road K,A Not specified Rural

Countermeasure: Install centerline rumble strips on roads with existing shoulder rumble strips

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
0.554 44.6 2 Stars Head on,Run off road,Sideswipe All Not specified Rural
0.758 24.2 1 Star Head on,Run off road,Sideswipe K,A Not specified Rural
0.353 64.7 2 Stars Head on,Sideswipe All Not specified Rural
0.758 24.2 1 Star Head on,Sideswipe K,A Not specified Rural
1.085 -8.5 1 Star Run off road All Not specified Rural

Category:Shoulder treatments

Countermeasure: Install shoulder rumble strips

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
1.123 -12.3 1 Star Head on,Run off road,Sideswipe All Not specified Rural
1.053 -5.3 1 Star Head on,Sideswipe All Not specified Rural
1.404 -40.4 1 Star Run off road All Not specified Rural

Countermeasure: Install shoulder rumble strips on roads with existing centerline rumble strips

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
0.625 37.5 2 Stars Head on,Run off road,Sideswipe All Not specified Rural
0.678 32.2 1 Star Head on,Run off road,Sideswipe K,A Not specified Rural
0.932 6.8 1 Star Head on,Sideswipe All Not specified Rural
0 100 1 Star Head on,Sideswipe K,A Not specified Rural
0.53 47 2 Stars Run off road All Not specified Rural
0.847 15.3 1 Star Run off road K,A Not specified Rural