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The A12 is an Italian autostrada (motorway), composed of two unconnected parts. The first one connects Genoa and Rosignano Marittimo, the second connects Civitavecchia and Rome. ==Overview== Plans to build the remaining stretch have existed for long time, but have never been executed, mostly because of the bad impact on the environment. While a "superstrada" (an almost motorway-like road, with 2 separate carriageways and interchanges) with a speed limit of 110 km/h exists between Rosignano Marittimo and Grosseto, the present road between Grosseto and Civitavecchia has 90 km/h speed limit, with long parts of single carriageway and even some parts of 2-lane road. The 2 proposed solutions are an entirely new motorway (with higher impact on the environment), and the upgrade to motorway standard of the present road (more environmentally friendly). Lack of agreement between supporters of either idea has led to the present situation. The road is also known as "Autostrada Azzurra", the Blue Motorway. 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「Autostrada A12 (Italy)」の詳細全文を読む スポンサード リンク
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