ShonTron
Moderator
Because 30 minute bus service is better than bi or even tri hourly train service.
Stouffville ran the counter peak train when it didn't have it's own yard and had to deadhead trains to stouffville, they simply ran one of those trains as a revenue service.
There was a yard in Stouffville proper, just past the station, but the reverse train was the fifth and there was not enough capacity at the old yard. The new yard/station at Lincolnville made the deadhead unnecessary.
And off-peak, 30 minute direct buses to/from Union are definitely better than off peak trains running less than every hour, especially if it requires a time consuming forced transfer at somewhere like Bramalea.