Toronto Ontario Line 3 | ?m | ?s | Metrolinx

W. K. Lis said:
Line 2 had a partly-covered bridge over the Rosedale ravine, until the vent opening were covered over with concrete to reduce "noise".

rosedale_valleybridge.jpeg

From link.

They could cover the open sections of the Ontario Line to reduce "noise", but likely they just cover it with concrete instead of glass.
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Found an image, along with an explanation of the ORIGINAL Rosedale portion of the Prince Edward Viaduct. From link.

20160218-BloorDanforth-RosedaleInt.jpg


Though there was also a viable subway deck on the Rosedale portion of the Prince Edward Viaduct, the TTC found it didn’t quite line up with the planned location of Sherbourne station, so a new bridge was required.

The solution, supplied by architect John B. Parkin and U.S. engineering firm DeLeuw, Cather & Co., was an open spandrel structure with a sweeping reinforced concrete arch. The deck, almost 17 metres above the valley floor, was almost entirely enclosed to prevent train noise disturbing residents of the nearby Kensington Apartments.
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Two rows of skylights provided ventilation through the roof of the bridge, but were later covered. Now it’s hard for subway riders to discern that they’re traveling high above a ravine, save for an increase in noise as the train rumbles along its concrete guideway.
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20150707-Viaduct-Air.jpg

The Bloor St. viaduct system shortly after the opening of the Bloor-Danforth line in 1965. Courtesy: City of Toronto Archives.
From link.

Maybe there can be a comprise where they may have to go above aground, but shield the surroundings from the noise, and still provide a sightseeing view.
 
W. K. Lis said:
Line 2 had a partly-covered bridge over the Rosedale ravine, until the vent opening were covered over with concrete to reduce "noise".


From link.

They could cover the open sections of the Ontario Line to reduce "noise", but likely they just cover it with concrete instead of glass.
Click to expand...

This was corrected to you by smallspy in the past. The vents/skylights atop the bridge were covered because it was screwing with Castle Frank's ventilation and fire safety. However no reason they couldn't have been covered with something transparent to continue allowing light through.
 
Bureaucromancer said:
Any idea when that rendition of Keele is from? I wasn't aware of there being a period after Bloor was the definite route but before and extension beyond Keele was confirmed.
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Even when they were debating the routing of the E-W subway (straight across Bloor or dipping down to Queen) the ends were still along Bloor. You are correct though that that rendering is probably from a pretty short period of time while plans were still fluid.
 
H4F33Z said:
Omg I'm so excited for unique architecture and beautiful, neighbourhood defining transit stations.
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I think the elevated stations will be predominantly glass like the REM and Vancouver SkyTrain and Canada Line which represent an efficient cost-effective standardized design.
The REM stations have platform screen doors, so the platforms are not exposed to winter weather - so that's probably closer to what you'll get for Ontario Line.
 
WRT noise from elevated lines - here's a link to TransLink's latest studies:
www.translink.ca

SkyTrain Noise Study

In response to noise concerns from residents along the Expo and Millennium lines, TransLink recently conducted a multi-step SkyTrain Noise Study. We want to be good neighbours, so we engaged an internationally-recognized acoustic engineer to assess noise levels along the Expo and Millennium...
www.translink.ca www.translink.ca
 
officedweller said:
Looks like it - the description says "... where the subway will be built..."
Thanks for posting.
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Just a rough guess on the route based on the above. I assume they are trying to avoid as many buildings as possible? This aerial might be outdated and some new construction may have started.

20200518_210441.jpg
 
Yeah, they'd want to avoid any condo tower underground parkades.
The Canada Line TBM bored under the underground garage for a 35 storey condo called Brava in Vancouver,
and a "void space" (ie sinkhole) opened up under the parkade, so they had to remediate that.
 
Allandale25 said:
Just a rough guess on the route based on the above. I assume they are trying to avoid as many buildings as possible? This aerial might be outdated and some new construction may have started.

View attachment 246246
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Going under buildings isn't that big a deal, provided it is done properly. The TBMs used on the TYSSE passed under quite a few of them while they progressed, and yet the spot that gave them the most trouble - although in fairness, the trouble was caused by the property owner and not the construction itself - was when they passed under CN's York Subdivision.

No, the alignment here has more to do with trying to maximize the curve radius, and thus minimize any speed restrictions and ongoing maintenance, than anything else.

Dan
 
Going under a garage isn't a big deal. The big deal is if it's a deep enough garage that it actually gets in the way.

A 1-2 level underground won't be a problem, but a 4 level garage might be. You have to understand which buildings have deep garages and try to avoid those.

And of course if you really can't avoid it you can just dig deeper. The deeper you go though the deeper and more expensive stations get.
 
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