The head motor car of the CFL train, built on the same assembly line as the SNCF train, had had its cabin crushed by the force of the collision and the roof was torn off by the overriding locomotive; however the intermediate trailing wagons and the tail motor car remained on the track, because the ends of each of the cars in between had anti-override structures which "locked" against each other in case of shock. These structures led to the high number of survivors.