Quote:
Originally Posted by madog222
So we aren't retrofitting the Canada Line, we are building a whole new line. What does that achieve? Why is that money not better spent building a new line where there isn't already rapid transit?
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The question is if you're better off rebuilding the Canada Line or building a new line when the Canada reaches capacity.
Parallel lines in practice usually provide only limited capacity relief.
Technically, you could just improve the signaling system, but that'd still cost hundreds of millions (the ATC on Line 1 in Toronto cost $700M)- so if you need to upgrade capacity on the Canada Line by adding more trains beyond the 120s minimum, you're looking at a major fraction of just replacing the entire thing.
https://torontosun.com/news/local-news/automatic-train-control-brings-ttc-into-the-future
Hence, why I brought the Bridgeport OMC and its associated CACs into consideration to potentially even out the costs.
There are higher priorities than doing this (even 15,000 is probably at > the 2060 time period, and you can get to 18,000 pphpd just by better train design), so this is really in the same category as an Expo relief line/lengthening the Expo Line stations.
One of the problems with an underground subway is that upgrading or adding a new station to it is much more difficult than with an elevated one or at-grade one, and most of Cambie is plenty wide enough for elevated tracks.
The Canada Line has station gaps (with no planned 'future' station) at 16th and Nelson + Granville as well.
I know the former was proposed and given up at some point due to the difficulty of building it (which is a shame, since it would allow for a bus on 16th Ave and much better access to the south part of the Broadway corridor area, which would become very useful once there's a lot of development in the Broadway area already.)
Not sure why there's not one at Nelson though. I'll try to track down the geotechnical documents, but that's also one that seems pretty useful.