 The St. Clair line was double-track but had no loops or wyes; thus, all streetcars were double-ended.After its creation in 1921, the Toronto Transportation Commission took over the assets of the Toronto Civic Railways and the Toronto Railway Company with the goal to connect and integrate the two separate streetcar systems.With respect to St. Clair, the TTC expanded the line eastwards and westwards, adding turning loops at end points and replacing double-ended streetcars with single-ended cars (initially ex–TRC cars).