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How rumble strips work
Rumble strips in Wisconsin are grooved patterns milled into the pavement perpendicular to the direction of travel. They can be installed on the centerline of the roadway or on the roadway shoulder. The driver of a vehicle passing over a rumble strip hears an audible warning (rumbling sound) and feels a vibration. These physical and audible warnings alert the drowsy, distracted or impaired driver, and assist the driver to identify the travel way in bad weather situations such as fog, rain or light snow, thus reducing the chance for a crash.
Milled-in rumble strips ground into the pavement are preferred over rolled-in rumble strips. Rolled-in rumble strips were previously used in Wisconsin until the mid 1990s. Milled-in rumble strips have been demonstrated to be the best design for reducing fatal and major injury crashes.
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Last modified: July 3, 2012
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