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

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.
Publication Date: 
Tuesday, April 16, 2013
Publication Number: 
WA-RD 799.1
Last modified: 
10/12/2016 - 15:41
Mark Sujka, Brad Manchas, Dave Olson.
Washington (State). Dept. of Transportation. Development Division, Design Office
Number of Pages: 
Rumble strips, Center lines, Road shoulders, Highways, Ran off road accidents, Head on collisions, Safety, Performance measurement, Accidents, Analysis.