What benefits has WSDOT realized from the use of rumble strips?

Shoulder rumble strips were installed on a 44 mile test section of Interstate 82 in 1992.  An evaluation of run-off-the-road accidents before and after rumble strip installation reveled a 40% reduction in run-off-the-road crashes.

The Interstate 82 experience led to system-wide application on the rural interstate system.  After wide spread installation, another before and after comparison was conducted for segments of Interstate 5, Interstate 90 and US 395.  That comparison evaluated 56 miles and revealed a 35% reduction in run-off-the-road crashes.

Contact Information

Dave Olson, Design Policy, Standards, and Research Manager
Design Policy & Standards @wsdot.wa.gov
360-705-7952  FAX: 360-705-6815
Washington State Department of Transportation Design Office
PO Box 47329
Olympia, WA 98504-7329

    Traffic & Roads | Site Index | Contact WSDOT | WSDOT Business | WSDOT Home