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A hook turn is a traffic-control mechanism where cars that would normally have to turn across oncoming traffic are made to turn across ''all'' lanes of traffic instead. Hook turns are relatively rare, but can be used to improve the flow of through-traffic or to keep the middle of the road free for trams or other special uses. For automobile traffic, intersections that permit hook turns generally require them, although the situation may be different for other vehicles (see below). ==Procedure== The procedure illustrated below is that used in Melbourne, Australia, where cars drive on the left. In a country where cars drive on the left, it is the right-turning cars making the hook turns; in countries where cars drive on the right, it is the left-turning cars making the hook turns. The general procedure is as follows: #On green, the turning vehicle approaches and enters the intersection from as near as possible to the left. If there is insufficient room to enter the intersection due to other vehicles waiting to hook-turn then it must wait for the next cycle of the lights. #The vehicle moves forward, keeping clear of any marked foot crossing, until it is as near as possible to the far side of the road that the vehicle is entering. #The vehicle remains at this position until the traffic lights on the road it is ''entering'' has changed to green. #The vehicle then turns right into the road and continue straight ahead. Vehicles moving straight into the same road must give way to hook-turning traffic before commencing through the intersection. Details vary by location. 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「Hook turn」の詳細全文を読む スポンサード リンク
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