The snowy weather has caused some traffic snarls in the GTA.
It was slow going on part of Highway 401, after a transport truck rolled over Tuesday morning near Highway 6, said OPP Sgt. Kerry Schmidt.
Schmidt said another car tried to pass the truck when it lost control, hit the wall, then hit the truck.
Schmidt said all lanes are now open, but crews are still working to pull one of the trailers out of a ditch. The truck driver has been taken to hospital with minor injuries, he said.
The winter weather has made the roads slick, Schmidt said. However, he said there aren't many more collisions than usual.
Earlier on Tuesday, part of Highway 400 was closed after a two-car collision southbound approaching King Road.
Schmidt said another tractor trailer jackknifed on Queen Elizabeth Way near Jordan Road, temporarily blocking two lanes.