The driver of a vehicle is in hospital with life-threatening injuries following a single-vehicle crash on westbound Highway 403 in Mississauga.

Ontario Provincial Police officers were called to the scene at Hurontario Street before 2 p.m. on Monday.

Police say the driver was the only person in the vehicle.

The westbound lanes are closed at Hurontario and police say drivers can expect a “prolonged closure during the on-site investigation and clean-up efforts.”

The cause of the crash is not yet known.