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 is 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.