Oh yeah, I'd love to see the City of Toronto be game for 4 freight tracks.CP Will not allow a bike path in its corridors.
The corridor is protected for 4 tracks and why the bridge over it is long. When Toronto West Diamond was removed, the bridges over the Weston Sub were build for 4 tracks.
GO has had a vision since the 70's/80's of running service across Toronto in CP Corridor and you need 4 tracks to do it.
If and when it may happen, the 2 rail crossing have been built to handle 4 tracks. Most overpasses while handle 4 tracks, but a number of crossings will have to be grade separate to the point some will have to be close off as there isn't enough room to do it.
This midtown GO corridor could have been accomodated by the bypass, and hence only needing 2 tracks, with lots of room to spare for a parallel railpath.
We could go on about it, but I'm loathe to derail this thread any further.