501 Queen Streetcars turning back east at Humber Loop from August 31 to December 21, 2014 due to City Bridge Work at the Gardiner Expressway and Lakeshore Blvd. http://ttc.ca/images/Service_Advisories/Route_Diversions/501_508_track_140831.gif Buses will replace streetcars on Lake Shore Boulevard West, between Long…