A pedestrian has been taken to hospital with life-threatening injuries after a collision in Mississauga Thursday evening. It happened at 5:26 p.m. in the area of Dundas Street and Tomken Road. The circumstances behind the collision are currently unclear, and police are advising people to avoid the area. The vehicle remained at the scene. Westbound lanes on Dundas Street are currently closed west of Tomken Road as police investigate.