Caption: Day and night, always busy. It's only a quarter past four and things are already hopping at Toronto's Union Station: GO 250 trails on Lakeshore East 432's future train, waiting to pull into Track 4 under the train shed to load passengers. GO 213 leads a packed Lakeshore West train 463 out of the station and through the slip switches near John Street interlocking tower. The headlights and markers of at least 3 more trains are visible, loading on Tracks 1, 3 and 5, with another GO pulling into Track 6 on the far right.