All lanes of the Toronto-bound QEW have reopened at Trafalgar Road in Oakville 13 hours after a fiery multi-vehicle crash involving a tractor-trailer.
The collision happened just before midnight on Thursday.
Police said a 34-year-old woman from Niagara Falls was killed in the crash, which involved as many as seven vehicles.
The woman was found inside a car that had been pinned against a concrete barrier by the tractor-trailer.
The tractor-trailer then caught on fire. Both vehicles were badly burnt.
Seven other people were taken to hospital with minor injuries.
All lanes of the QEW reopened just before 1 p.m. Friday.