The Canoe River train crash Catastrophe occurred Coming_to_be on November 21 , 1950 , near Valemount in eastern British Columbia , Canada , when a westbound troop train and the eastbound Canadian National Railway ( CNR ) `` Continental Limited Limiting '' collided Catastrophe head-on .

After the accident , the CNR installed Placing block signals on the stretch of track on which the crash Catastrophe occurred Coming_to_be .