Washboarding
Formation of ripples in gravel and dirt roads / From Wikipedia, the free encyclopedia
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This article is about the spontaneously-developed road texture. For the deliberately-formed roadway surface, see Rumble strip. For other uses, see Washboard (disambiguation).
Not to be confused with Waterboarding.
Washboarding or corrugation[1] is the formation of periodic, transverse ripples in the surface of gravel and dirt roads. Washboarding occurs in dry, granular road material[2] with repeated traffic, traveling at speeds above 8.0 kilometres per hour (5 mph).[3] Washboarding creates an uncomfortable ride for the occupants of traversing vehicles and hazardous driving conditions for vehicles that travel too fast to maintain traction and control.[4]