[Innsertnamehere]

The idea with retaining service on the existing line is for it to be local service only, not half the service between the major cities. I recall comments saying that most trains will terminate at Kingston, and not through run.

The idea is that if you are going from Toronto to Ottawa or Montreal, you use the new corridor. The old corridor is left for local service to Trenton, Cobourg, Kingston, Belleville, etc. as it's frequently disturbed by freight service and is unreliable.

A sort of similar condition exists between Toronto and London today - most people going between those two destinations use trains on the southern rail corridor through Brantford as it delivers ~2 hour travel times. There is service on the northern corridor through Kitchener, but it's 3+ hour travel times, which means it is mostly for local service.