Your Friday traffic briefing courtesy of Stephanie Henry. Southbound 410 through Williams Parkway with a lane blocked by a stalled vehicle. Southbound 400 heavy delays from Finch through Sheppard with three left lanes blocked by a collision. Emergency crews responding. Westbound QEW delays from Cawthra to Mississauga Road with two left lanes blocked for maintenance. Eastbound 401 with two left lanes closed for maintenance through Port Union in the Express.