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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]
A corduroy road or log road is a type of road or timber trackway made by placing logs, perpendicular to the direction of the road over a low or swampy area. The result is an improvement over impassable mud or dirt roads, yet rough in the best of conditions and a hazard to horses due to shifting loose logs.
Imogene Pass is a 13,114 ft (3,997 m) high mountain pass in the San Juan Mountains in the southwest part of the US state of Colorado.. It crosses a ridge connecting Ouray, Colorado with Telluride, Colorado, and is the highest mountain pass in the San Juan Mountains, and the second highest vehicular mountain crossing in Colorado.
Because the roadway is restricted by the banks on either side, sunken lanes typically admit the passage of only one vehicle; that is, they are single track roads. Occasional passing places may be provided, but a meeting of vehicles in a sunken lane often requires one party to reverse to a suitable passing place. In Central Germany, "dual ...
The Outside Lands in 2011 shown from the northwest, with Lands End and the Richmond District in the foreground, then Golden Gate Park (the rectangle) and the Sunset District at center-right. Like all of California, the Outside Lands were a Mexican possession until the Treaty of Guadalupe Hidalgo in February 1848 ceded it to the United States.
For the first time ever, a computer has successfully convinced people into thinking it's an actual human in the iconic "Turing Test." Computer science pioneer Alan Turing created the test in 1950 ...
A bypass is a road or highway that avoids or "bypasses" a built-up area, town, or village, to let through traffic flow without interference from local traffic, to reduce congestion in the built-up area, to improve road safety and as replacement for obsolete roads that are no longer in use as a result of devastating natural disasters ...
In 500 BC, Darius the Great started an extensive road system for Persia, including the famous Royal Road which was one of the finest highways of its time. The road was used even after Roman times. Because of the road's superior quality and a system of relays, mounted mail couriers could travel 2,699 kilometres (1,677 mi) in nine days. [11]