Traffic on a highway in the Montreal area. Vehicles off the road following a collision. Traffic on a highway in the Montreal area during a snow storm (very low visibility). A patrol car of the Surete du Quebec (SQ) traveling on the highway, lights flashing. A towtruck and a fire truck parked on the highway. SQ patrol car with flashing lights and arrows. Vehicles in the ditch, following a pile: a tractor-trailer and a van. Keywords: ROAD ACCIDENT,HIGHWAY,TRAFFIC,MONTREAL (REGION),SNOW,SNOWSTORM