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Ontario Line Extension West of Ontario Place (Speculation)

If UPX became part of the Ontario Line, you can even imagine more branches of Line 3, or at least its technology.
But why would that happen? That just poses the question of where to bring the line from Exhibition to the UPX corridor, and removes the direct connection between the city's two largest transit hubs. I can only see it making sense if it branched north on Jane Street from Trethewey to Highway 407.

The only corridor that makes sense to me continues to be west to Park Lawn GO, then west on Queensway to at least Kipling, ideally further to Sherway Gardens or Dixie GO.
 
If it's even physically and/or technologically possible within the corridor, I could see UPX being converted to a second line using "Ontario Line" technology, but I have a harder time seeing UPX merged with Line 3.
I think the biggest issue with the idea is that there is no way federal regulations would let Line 3's Light-Metro trains run on the same tracks as GO's much larger and heavier trains. As well there are issues with signalling, automation and possibly loading-gauge. All that is to say that it is possible to do but it would require a rework of the Weston Sub with the OL being given its own dedicated tracks separate from the Kitchener Line. At least a minimum of 2 tracks for GO and 2 tracks for the OL which also mean new platforms at some stations (basically like Line 2 using the Galt Sub row or the SRT using the Uxbridge Sub row). That said the corridor is wide enough for 4 tracks so its not impossible to add a fourth and then give the OL and GO two each, they just can't interact with each other in revenue service. So its not impossible it would just require a bit of money.

Another issue is what do you do with the UP since there would no longer be an express link between Pearson and Union. Do you just run the UP trains on the GO tracks? Do you replace the UP's DMU's with Light-Metro EMU's? or do you make it a branch of the OL?.
 
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But why would that happen? That just poses the question of where to bring the line from Exhibition to the UPX corridor, and removes the direct connection between the city's two largest transit hubs. I can only see it making sense if it branched north on Jane Street from Trethewey to Highway 407.

The only corridor that makes sense to me continues to be west to Park Lawn GO, then west on Queensway to at least Kipling, ideally further to Sherway Gardens or Dixie GO.
There’s been some chatter recently. Since the technologies will eventually be similar—and the systems serve comparable roles in both the east and west—merging them isn’t an unreasonable idea. The real challenge would be figuring out how such a service interfaces with Union Station and the current Ontario Line alignment. But if you start thinking of it more as an urban-style REM network, the concept becomes a lot more plausible.
 
There’s been some chatter recently. Since the technologies will eventually be similar—and the systems serve comparable roles in both the east and west—merging them isn’t an unreasonable idea. The real challenge would be figuring out how such a service interfaces with Union Station and the current Ontario Line alignment. But if you start thinking of it more as an urban-style REM network, the concept becomes a lot more plausible.
I don't think a merger is unreasonable, but I think keeping them seperate while making the UPX a new dedicated electrified line is enough to transform the west end. Keeping this new hypothetical UPX and the OL seperate gives a huge amount of flexibility to a western OL extension - whether that's continuing west towards the Queensway, turning up to serve Dufferin and eventually Jane, or as some have mentioned, branching to do both. Just off currently planned stations on the Kitchener corridor, this new UPX line would get connections to Line 1 at Union, 510, 504, Line 2, 512, Line 5, Line 6 and the airport.

With that line in place, the OL extension could fill in missing gaps by heading north on Dufferin with stops at King, Queen, Dundas/College (at this point the streets are close enough to serve 1 out of 2), Bloor, Dupont, then veer west and north up Jane to connect to Line 6. I'd imagine these 2 western lines could have a Junction interchange where Dupont/Annette/Dundas W meet. And in my opinion if the OL were to head up north on Dufferin I'd move King-Liberty's proposed location slightly closer to the Strachan/Wellington area to serve the bulk of the new LV density, then add an OL/UPX interchange closer to the edge of Joe Shuster Way/ Sudbury/Dufferin/Queen to get a trifecta of stations in Liberty Village. In combination with streetcars/busses that feels like it gives the West end a great improvement to transit connections.
 
I don't think a merger is unreasonable, but I think keeping them seperate while making the UPX a new dedicated electrified line is enough to transform the west end. Keeping this new hypothetical UPX and the OL seperate gives a huge amount of flexibility to a western OL extension - whether that's continuing west towards the Queensway, turning up to serve Dufferin and eventually Jane, or as some have mentioned, branching to do both. Just off currently planned stations on the Kitchener corridor, this new UPX line would get connections to Line 1 at Union, 510, 504, Line 2, 512, Line 5, Line 6 and the airport.

With that line in place, the OL extension could fill in missing gaps by heading north on Dufferin with stops at King, Queen, Dundas/College (at this point the streets are close enough to serve 1 out of 2), Bloor, Dupont, then veer west and north up Jane to connect to Line 6. I'd imagine these 2 western lines could have a Junction interchange where Dupont/Annette/Dundas W meet. And in my opinion if the OL were to head up north on Dufferin I'd move King-Liberty's proposed location slightly closer to the Strachan/Wellington area to serve the bulk of the new LV density, then add an OL/UPX interchange closer to the edge of Joe Shuster Way/ Sudbury/Dufferin/Queen to get a trifecta of stations in Liberty Village. In combination with streetcars/busses that feels like it gives the West end a great improvement to transit connections.
Kinda reminds me of the London Docklands Light Rail system. A bunch of interlining routes sharing one unique system design, overlaid on top of a more conventional heavy rail network.

But since the UP is already being looked at for electrification and higher frequency, the idea of just converting it to Ontario Line standards straight up and having a Don Valley-East Harbour-Union-Bloor-Mt Dennis-Pearson U-shaped service is interesting!
 
On Steve Munro's blog, I saw this. It seems the current thinking is to extend OL West to Dundas West. I suppose that imagines following the GO ROW.

View attachment 664174
It seems the tea leaves are pointing to the Ontario Line replacing the UPX along the corridor towards the airport.
 
It seems the tea leaves are pointing to the Ontario Line replacing the UPX along the corridor towards the airport.
I don't think that can be concluded from Official Plan Map 4. That extension from Exhibition to Dundas West is mostly a hangover from the old DRL alignment (that's still on the current Official Plan Map 4).

Though that does remind one - what happened to the Fall 2025 Map 4 council considerations - https://www.toronto.ca/city-governm...udies-initiatives/official-plan-map-4-review/
 
I don't think that can be concluded from Official Plan Map 4. That extension from Exhibition to Dundas West is mostly a hangover from the old DRL alignment (that's still on the current Official Plan Map 4).

Though that does remind one - what happened to the Fall 2025 Map 4 council considerations - https://www.toronto.ca/city-governm...udies-initiatives/official-plan-map-4-review/
You're right. I cited tea leaves as my source. lol

But it seems with the recent changes to the UPX this could be a convenient route to take. A branch to the airport on the Kitchener sub and a branch up Jane into North York perhaps. Perhaps a branch every 15 mins to Union. Speculation of course.

However, I've read that the cantenary used on OL incompatible with what GO will use so I'm not sure how realistic such a scenario is.
 
However, I've read that the cantenary used on OL incompatible with what GO will use so I'm not sure how realistic such a scenario is.
I'd think you'd need to do like what is done between the Don River and Gerrard stations, with two dedicated tracks alongside the GO tracks, from about Wallace, north.

Seems like a bit of a waste of an opportunity though. I'd sooner see frequent service on a frequently-stopping UP-like service to Pearson (and beyond?), which also uses the express tracks for additional express Pearson services. All compatible with GO Trains.

Looking at the population growth in the report you referenced, a better opportunity would to service the Humber Bay Shores area (which is already increasingly dense) along with the projected population growth in Etobicoke, west of Kipling and north of the QEW, and then up the 427 corridor where there's some existing density. Though the Ministry would probably prefer to use the poorly placed hydro corridor (which is actually shown on this figure below).

1764613486458.png
 
Converting the UPX into an Ontario line style metro sounds much better than the "Smart Track" solution proposed by John Tory.

If this were a real possibility, than perhaps we can reconsider building GO stations at King-Liberty, Spadina- Front Street & St. Clair W?

Allow for the GO train to have larger stop spacing, while having a parallel running line with shorter stop spacing.
 

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