Haven't posted in a while (though check out the article here I did on the announcement -
https://urbantoronto.ca/news/2022/04/torontos-regional-rail-network-go)
For all those talking about 3.5 minute headways my understanding is this refers to what will be several key quad track sections, like around EX on LSW, LSE / Stouffville, and Kitchener on Gerorgetown south. That lines up with the roughly 7 minute headways we've heard about on dual track lines. So you'd get a 3.5ish min frequency when you consider combined local express service - unfortunately it isn't really organized in a way for that to be useful on most corridors, since we are planning on running the lines together (line running) rather than the directions together (directional running) this let us drop the Scarb Junc grade separation but means you can't just wait on the platform at say Dundas West and catch the next train because it's either a local or express to union, they are unlikely to be on the same island platform.
Re. no emus, I am as sad as anyone, but key things to note . . .
1) We don't have a facility to do maintenance on a giant EMU fleet, that would require lots of space and would be expensive (Whitby is gtg for electric locos!)
2) If a fleet of 200 streetcars is over a bullion dollars how much is a fleet of big mainline emus - clearly a lot of money to be saved here
As much as I want emus we also aren't designing the network for it . . . look at these stop spacings . . .
Tightest will be Mimico to Park Lawn (and not all trains will stop at both I imagine) at like 1km
Union to Spadina is also roughly 1km but only Barrie will stop (sadly)
Union - East Harbour ~2.5 km
Union - Exhibition ~3+ km
Union - King Liberty ~3+ km
Spadina - Lansdowne ~5 km
King Liberty - Bloor Dundas West ~3 km
St. Clair / Stockyards - Bloor Dundas West ~2 km
These stop spacings just aren't subway like, and while the potential to add more stations is there, with the subway network we are building there is less and less need to provide super local service on GO. That can always chance in the future but shorter trains plus electric locos probably isn't going to be that different from EMUs at this point . . .
Also Zurich operates some trains with locos and very good service - it can be done . . .