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Col du Galibier (el. ) is a mountain pass in the southern region of the French Dauphiné Alps near Grenoble. It is the ninth highest paved road in the Alps and the sixth highest mountain pass. It is often the highest point of the Tour de France. It connects Saint-Michel-de-Maurienne and Briançon via the col du Télégraphe and the Col du Lautaret. The pass is closed during the winter. It is located between the massif d'Arvan-Villards and the massif des Cerces, taking its name from the secondary chain of mountains known as the Galibier. Before 1976, the tunnel was the only point of passage at the top, at an altitude of 2556 m. The tunnel was closed for restoration until 2002, and a new road was constructed over the summit. The re-opened tunnel is a single lane controlled by traffic lights, which are among the highest such installations in Europe. == Details of the climb == From the north, starting at Saint-Michel-de-Maurienne (including the Col du Télégraphe), the climb is long, gaining in height (an average of 6.1%). The actual climb to the summit starts at Valloire and is long at an average of 6.9% (height gain: ). The maximum gradient is 10.1% at the summit. From the south, the climb starts from the Col du Lautaret (el. ) and is long at an average gradient of 6.9% (height gain: ) with a maximum of 12.1% at the summit. On both sides of the Col du Galibier mountain pass cycling milestone are placed every kilometre (As of July 2015, some are missing in the final part of the climb from the Col du Lautaret). They indicate the distance to the summit, the current height, and the average slope in the following kilometre. Such signposting for cyclists has become common in most major mountain passes in the French Pyrenees and Alps. 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「Col du Galibier」の詳細全文を読む スポンサード リンク
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