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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Run-off-road collision ： ウィキペディア英語版 Run-off-road collision A run-off-road collision is a type of single-vehicle collision that occurs when a vehicle leaves the roadway. Contributing factors often include loss of control or mis-judging a curve, or attempting to avoid colliding with another road user or an animal. If the vehicle strikes a fixed object (an object that will move very little when struck, such as a tree, bridge structure or utility pole) or rolls over, the crash is likely to result in injuries or fatalities. 2005 statistics from the US show that run off road crashes resulted in 31% of fatal crashes, but were only 16% of all crashes.〔National Highway Traffic Safety Administration, Traffic Safety Facts 2005, 2007, P. 54. http://www-nrd.nhtsa.dot.gov/Pubs/TSF2006.PDF〕 Run-off-road collisions where the vehicle is sliding or spinning and runs broadside into a fixed obstacle are particularly dangerous, since the vehicle doors and sides provide less protection to occupants than the front of the car. ==Clear zones== An important concept in understanding run-off-road crashes is the clear zone. This is the roadside area that is free from obstacles and dangerous slopes. Early research at the General Motors Proving Grounds found that 80% of their test drivers stopped or regained vehicle control within 30 feet (9 m) of the edge of the travel lane. As a result, civil engineers began to try to provide thirty feet of clear, flat ground next to rural highways. The result was fewer crashes. Current guidance adjusts the desired clear zone width for curvature, roadside slope, speed and volume. More width is recommended on the outsides of curves, where the ground slopes down away from the road, and on high speed, high volume roads.〔New York Department of Transportation Highway Design Manual, https://www.dot.ny.gov/divisions/engineering/design/dqab/hdm/chapter-10〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Run-off-road collision」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.