A tractor-trailer rollover on Highway 401 at Highway 404.
The Highway 401 collector lanes have reopened near Highway 404 in Toronto following a tractor-trailer rollover.
Provincial police say the on-ramp from the northbound Don Valley Parkway to Highway 401 westbound was closed as well due to the rollover.
The closure went into effect around 9:30 p.m. on Tuesday and reopened to traffic just after 6:30 a.m. Wednesday.