FWIW - on a trip to Aurora this week, my GO train passed a CN roadswitcher that was delivering two cars of lumber to the lumberyard in King City. This customer had switched to truck delivery, and hadn't seen a railcar in a very long time....but I am told they returned to rail deliveries late last year. There has been a tweak to their siding trackage which allows a much simpler switching move, so there is no need for the work window and bustitutions that previously affected GO service whenever a shipment was delivered.
CN has retained customers in the Concord and Maple area, but that area has more siding space and sending a freight that far up the Barrie line has never affected GO operations. The King City customer is located on single track so a bit more challenging to fit the switch into a 2WAD operation.
It's nice to see one more bit of business for the railways - and it is a reminder that ML and CN can cooperate when the will is there.
- Paul