A five-vehicle collision led to major traffic delays on the Don Valley Parkway (DVP) leading into the Gardiner Expressway on Saturday night.Emergency crews were called to the DVP, near Gerrard Street East, just before 7 p.m.At least two people were transported to a hospital. The extent of their injuries was not immediately known.Police are warning of heavy traffic in the area. Motorists are advised to use other routes.