mdrejhon
Senior Member
HSR is not necessarily less frequent. There are more TGV trains visiting Paris' main train station everyday, than GOTrains visiting Toronto Union today. In fact, some TGV high speed trains have 3 minute headways -- Some part of their TGV network is like a high speed GO train network, in a way.But a less frequent service like HSR may be something that could work.
Ditto for Japan, which have extremely frequent high speed trains where you just wait for them subway-style, on some highly-trafficked routes. On some routes, Shinkansen is more subway-frequent than our Sheppard subway -- you don't need a timetable for some city pairs!
Depending on how we implement high speed trains, we might have ultrahigh-frequency high speed trains that completely replace express GO trains & bus service between specific city centres (e.g. Kitchener-Waterloo and Toronto).
By the 2030s-2040s+ (when it all makes sense) the corridor may be sufficiently densified enough, and the public transit in both cities strong enough, to warrant all-day two-way high speed express trains, with a single Pearson stop, plus semiexpress trains that also stop at certain upgraded GO stations. This is, of course, all dependant, on capacity available through the constrained corridor -- but if it replaced the GO train service bus service, it does free up the capacity. As the high speed trains now become much faster than the car, it pulls some people off the roads, and the popular intercity buses would likely end; and the demographic evolution, this likely pretty much fill half-hourly trains by the 2030s; making GO service redundant except to a few lower-traffic stations
The CN Brampton subdivision would be the primary showstopper, that said, assuming the small section of constrained corridor was triple-tracked (something already being investigated) and the high speed trains replaced the GO trains, there's no reason why it isn't possible. They would have to interleave directions, something doable with hourly or half-hourly service, as the rest of the CN Brampton subdivision can be four-tracked (outside of Brampton downtown) so it would be a very short section of triple track that constrains freight / occasional GO train / frequent bidirectional commuter HSR.
Any service more frequent, will probably pretty much force a serious discussion of the difficult and complex Freight Bypass ultra-megaproject. But half-hourly high speed trains would look to be doable without kicking freight trains off the Brampton subdivision...
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