Caption: The hum of natural-gas fired switch heaters keeping the switch points clear of snow and debris blurs with the din of morning rush-hour traffic on the bridge, serving as background noise to the constant stream of morning GO, VIA, Amtrak and ONR trains click-clacking through the switches at Bathurst Street interlocking inbound to the city. Here, F59PH 549 leads packed Lakeshore West train #472 eastbound off the CN Oakville Sub into the Union Station Rail Corridor at Bathurst St., just a few minutes before 8:00am and just a few clicks away from its destination.