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Washboarding effect on a road. 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]
While most gravel roads are all-weather roads and can be used by ordinary cars, dirt roads may only be passable by trucks or four-wheel drive vehicles, especially in wet weather, or on rocky or very sandy sections. It is as easy to become bogged in sand as it is in mud; a high clearance under the vehicle may be required for rocky sections.
An off-road vehicle is considered to be any type of vehicle which is capable of driving on and off paved or gravel surface. [1] [failed verification] It is generally characterized by having large tires with deep, open treads, a flexible suspension, or even caterpillar tracks.
Mountainboarders, also known as riders, ride specifically designed boardercross tracks, slopestyle parks, grass hills, woodlands, gravel tracks, streets, skateparks, ski resorts, BMX courses, and mountain bike trails. It is this ability to ride such a variety of terrain that makes mountainboarding unique from other board sports.
Off-roading is the act of driving or riding in a vehicle on unpaved surfaces such as sand, dirt, gravel, riverbeds, mud, snow, rocks, or other natural terrain. Off-roading ranges from casual drives with regular vehicles to competitive events with customized vehicles and skilled drivers.
The Birdsville Track is an outback road in Australia. The 517-kilometre (321 mi) track runs between Birdsville in south-western Queensland and Marree, a small town in the north-eastern part of South Australia. It traverses three deserts along the route, the Strzelecki Desert, Sturt Stony Desert and Tirari Desert.
A run-off area is an area on a motorsport race track used for racer safety. Run-off areas are usually located along a road racing circuit where racers are most likely to unintentionally depart from the prescribed course. There are different types of run off areas, like gravel trap, AstroTurf, and tarmac. Run-off areas are an alternative to ...
However, this was the only time the sand/gravel traps were not able to stop a vehicle, so NTR continued to use them any time the NHRA was in town. The NHRA and National Trail Raceway eventually worked out a deal with the Ohio State Highway Patrol to close down that area of Refugee Road during Springnationals weekends.