A 28 year old woman has suffered injuries that have been described as life threatening after he was struck by a vehicle in Vaughan on Wednesday evening.
The collision happened near Dufferin Street and Major Mackenzie Drive shortly after 7 p.m.
The victim is thought to have suffered serious head injuries and has since been transported to hospital in a critical condition.
The driver of the vehicle remained on scene and is cooperating with police.
Major Mackenzie Drive has been closed both ways between Dufferin Street and Sir Benson Drive to facilitate the police investigation.