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Rampe de Laffrey
The Rampe de Laffrey (sometimes called the descente de Laffrey or the côte de Laffrey) is a section of France's Route nationale 85, today called the ''Route Napoléon'', located in the department of Isère between the communes of Laffrey and Vizille, about fifteen kilometers southeast of Grenoble. It is a steep and mostly relatively straight section of road which ends in a sharp turn, and known for the high number of fatal automobile accidents which have occurred along its route. Four of these, in 1946, 1973, 1975, and 2007, and all affecting buses of pilgrims returning from Notre Dame de la Salette, are counted among the deadliest in French history.
==Design of the ramp==
The slope begins in the center of the village of Laffrey at a height of 910 meters, right on the edge of the Matheysine plateau. It then goes downhill along the mountainside, passing as it does through the territory of Saint-Pierre-de-Mésage and Notre-Dame-de-Mésage, before veering to the right before the bridge over the Romanche and entering the town of Vizille at an altitude of 300 meters; between these two locations, 7.5 kilometers apart, the slope descends just over 600 meters. The road is only slightly sinuous, but at its beginning contains many broad turns while remaining relatively stable near its end. Its steep slope is its most notable feature, averaging 12% along its lower portion and 16 to 18% in some places; just before the bridge at the Romanche it finishes with a 110° turn.〔("Laffrey, une mauvaise pente" ), ''Libération'', August 8, 2007〕 As a consequence of its design, the road was used for testing Berliet trucks until 1970.〔 It was also used as a route for motorcycle races beginning in 1960, and at one time was considered as a possibility for an Alpine stage of the Tour de France.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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