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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 Twin bridges ： ウィキペディア英語版 Twin bridges Twin bridges are a set of two bridges running parallel to each other. A pair of twin bridges is often referred to collectively as a twin-span or dual-span bridge. Bridges of this type are often created by building a new bridge parallel to an existing one in order to increase the traffic capacity of the crossing. While most twin-span bridges consist of two identical bridges, this is not always the case. The two bridges that form the Chesapeake Bay Bridge, for example, have several differences, most notably in the number of lanes each carries. The longest twin-span bridge is the Lake Pontchartrain Causeway in Louisiana. For a bridge owner, twin bridges can improve the maintenance and management of the structures. For motorists, twin bridges can limit the risk that both directions of traffic will be disrupted by an accident. ==References== 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「Twin bridges」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.