RUMBLESTRIP
Rumble strip
Rumble strips, also known as sleeper lines, audible lines, and growlers are a road safety feature that alert inattentive drivers to potential danger by causing a tactile vibration and audible rumbling, transmitted through the wheels into the car body. A rumble strip is usually either applied in the direction of travel along an edge- or centerline, to alert drivers when they drift from their lane, or in a series across the direction of travel, to warn drivers of a stop ahead or nearby danger spot. In favorable circumstances, rumble strips are effective at reducing accidents due to inattention. The effectiveness of ...The above text is a snippet from Wikipedia: Rumble strip
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