Tracking Down the Toronto Suburban Railway From 18 storeys up, I often gaze out my window, eastward toward Mississauga Valley. Out there, in a past that Im too young to recall, trolleys of the TSR once traveled. Today, only the faintest traces of this old electric interurban radial line remain. From the corner of Keele and Dundas to a point just west of Etobicoke Creek, the route of the Toronto ...