On 18 July 1973 a Belgian coach from Soignies carrying 49 tourists from Soignies, Braine-le-Comte and Tubize crashed on the Rampe de Laffrey near the small town of Vizille, Isère, France. Shortly after nine o'clock the brakes of the coach, driven by Albert Lechien also the owner of the firm, failed. The coach missed a curve at the base of the RN85 aka route Napoléon, near its intersection with the bridge over the Romanche, and overturned into the river. 43 people were killed and 6 injured.
At the same place there have been coach accidents in 1946 (18 deaths), 1956 (7 deaths), 1970 (5 deaths), 1975 (29 deaths), and 2007 (26 deaths).