reaperexpress
Senior Member
I was recently looking at the track configuration between Dorval and Gare Centrale and was pleasantly surprised by how little conflict there is between CN and Via.In theory, I agree that Ottawa and VIA should have begun with a low investment demonstration project, with Ottawa-Montreal being the idea candidate.
But in reality, I suspect there were several deal breakers:
- Any project would have had to cope with entry into Montreal from the west. It's likely that CN has only limited capacity eaSt of Dorval (or even Coteau) such that any significant added frequency demands extensive construction.of new trackage. So the "cheap" project cost might be inflated by several hundred millions just for that bit. (A very wise investment, I would say....., but there may not be an actually "cheap" demo project available.
- I suspect that any demonstration project that excluded the Trois Rivieres line would have political repercussions. If that line isn't in the initial tranche of investment, the demonstration might aggravate the Quebec voters.. (That political reality annoys me, but it is what it is)
- The whole idea of a demonstration project that leans heavily on a shared solution with a freight railway on a shared line runs directly contrary to the HfR premise. If that solution were that easy, we could build along CP and CN more broadly....except....
- Even a demonstration project with only a few kms of new construction might trigger a demand for consultation and environmental study on a scale that isn't "quick and dirty"...
IIRC, the investment that VIA was proposing on the Alexandria Sub was actually pretty affordable.... not much more than the cost of the JPO. If we had just built that instead of funding bureaucrats for three years, I'm sure VIA would have a decent line of its own that would sell the concept well..
So while that podcast makes some good points, I'm not taking it too literally as the better solution. It simply rubs salt in the whole inability to get HFR going.
East of Dorval station the line widens to three tracks, with the added north track only being used by CN trains heading to/from Taschereau Yard. But as CN's main yard in the area, I assume that a large proportion of their trains are in fact heading to/from that yard.
Typical Via route in yellow
At the yard, the junction configuration also allows CN trains to access the yard from the northernmost mainline but not the southern mainline.
East of the yard there are two tracks for CN trains heading to the yard.
The track configuration at the east end suggests that the two northern tracks act more as sidings rather than mainlines, but maybe there is some potential to upgrade at least one of them to be available as a mainline for CN trains heading from the yard.
The distance from the merge to the point where Via trains split off towards Gare Centrale is only 2.4 km. It seems like building a flyover to bring a pair of Via tracks over the CN tracks would pretty much solve the conflict with CN in Montréal.
That would be a project similar in scale to the Davenport Diamond grade separation.
West of Dorval, some other strategy is needed. Operationally speaking it would be nice if we could make CN and CPKC share one of the track pairs while Exo and Via share the other (which would need some passing tracks at local stations), but we didn't have much success with that strategy when planning the Missing Link between Brampton and Milton.