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Road traffic collisions generally fall into one of four common types: * Lane departure crashes, which occur when a driver leaves the lane they are in and collide with another vehicle or a roadside object. These include head on collisions and run-off-road collisions. * Collisions at junctions include rear-end collision and angle or side impacts. * Collisions involving pedestrians and cyclists * Collisions with animals Although other types of collision do occur. Rollovers are not very common, but lead to greater rates of severe injury and death. Some of these are secondary events that occur after a collision with a run-off-road crash or a collision with another vehicle. If several vehicles are involved, the term 'serial crash' is often used. If many vehicles are involved, the term 'major incident' may be used. ==Head-on collisions== Head-on collisions often have poor outcomes because of the speed involved when the collision takes place. The typical cause of head-on collisions is when one vehicle inadvertently strays into the path of an oncoming vehicle. However, the root cause sometimes lies in a steering overcorrection after veering to the side of the road as opposed to the centre.〔(【引用サイトリンク】accessdate=2008-09-26 )〕 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「Road collision types」の詳細全文を読む スポンサード リンク
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