 Route 512 St. Clair serves St. Clair Avenue between St. Clair station at the east end of the line and Gunns Loop at Gunns Road at the west end.The route passes through St. Clair West station in both directions.The route operates almost entirely within a dedicated streetcar right-of-way, with mixed traffic for a short distance east of Yonge Street and for very short distances at streetcar loops.