Although 18% of all crashes are single vehicle run-off-the-road crashes they account for 30% of all the fatal crashes on Washington State highways.  In an effort to reduce these fatalities, shoulder rumble strips are used to alert drivers that they have left their intended lane of travel.

What are rumble strips?

Where does WSDOT use rumble strips?

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

What are the trade-offs associated with rumble strips?

What is in the future for rumble strips in Washington State?

Evaluating Shoulder Rumble Strips on Rural Undivided Highways

Links to other information sources on rumble strips

Share your thoughts on rumble strips with WSDOT

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

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