Your Wednesday traffic briefing courtesy of Stephanie Henry. Southbound 410 jammed with four left lanes blocked by collision from Sandalwood to Queen. Westbound 401 volume delays from 412 to Salem. Northbound Brimley ramp to Westbound 401 closed for construction until July 24. Westbound 401 ramp to Yonge closed for maintenance. Westbound 401 slow from Mavis to Mississauga Road in the Collector. Two right lanes blocked from overnight construction. Westbound 401 ramp to Mississauga Road closed for construction. Southbound Mavis and Mississauga ramps to Westbound 401 closed for construction.