Caption: It's a little game we play on the Galt Sub. Toronto-Detroit train 135 usually has containers that go to Detroit, and also often has interesting trailing units. In Detroit, the power is wyed so the same power returns the next day. But if there is no container traffic for the US, it may terminate in Windsor. Or it may go to the US to lift containers there. There's no wye in Windsor, and in this case, no trip to the US. This provides a fairly rare occurrence of CN leading on CP shortly after sunrise.