Roads

thumb|Bundesautobahn 73 and its [[slip road leading to Erlangen, in Germany]]

route for driving livestock on foot

number or alphanumeric characters assigned to a stretch of public roadway often dependent on the type of road

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system of standards used by NATO to classify the safe amount of load a surface can withstand

thumb|Washboarding effect on a road Washboarding or corrugations is the formation of periodic, transverse ripples in the surface of gravel and dirt roads. Washboarding occurs in dry, granular road material with repeated traffic, traveling at speeds above . 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.