There's a great deal more at play here than that, and you know it.
Burying is completely the right choice here, and there is no credible argument to the contrary.
This is not Eglinton West.
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From undersized capacity, to stations w/no weather protection, to profoundly negative impacts on the surrounding communities, including on parks, mature trees, heritage and noise.
I heartily disagree. This city buries far too much, driving the cost of transit infrastructure far too high. I agree Eglinton West absolutely shouldn't be buried - but this shouldn't either.
Undersized capacity is a whole other cup of tea that isn't really related to whether it should be buried.
The stations can be weather protected as it will have platform doors. And even if they aren't, who really cares, the line is going to be running at sub-2 minute frequencies. Nobody's standing in the cold for long here.
These profoundly negative effects on surrounding communities take the form of utilizing an existing, overgrown rail corridor and demolishing an existing strip plaza.. not really "profound" in my mind. It's not like they are mass expropriating residences. Which, by the way, would also be fine with me if it was cheaper than burying. Subway infrastructure is worth that kind of impact.
Losing a small pocket park to build the station sucks, sure, but are we really going to spend, again, $1,000,000,000 to save a park that a handful of people sit in and watch the birds every day? Nah. If it's really that bad, spend $20 mill and build a huge new community park in the area or something.
Noise - Ok, but in exchange these people are getting access to super high quality rapid transit. And is noise here really any different than on Eg West?
This city gets all in a huff about impacts from infrastructure. We saw it on the SSE when the city planned to expropriate a few houses and the city opted instead to spend a few hundred million to dodge them. That kind of proposition has 0 value for money. It's politics, and it's a big reason this city has built such little infrastructure in the last generation.
Think back to Toronto's first subway line. They bought up several hundred houses and demolished them to build the line, to the result of much greater impacts than this line is proposed, and in return delivered a project at much lower cost. A generation later, can anyone even tell what these "impacts" were? Same with the Bloor-Danforth line. I'm guessing the people living around Keele and Bloor weren't too happy about that massive elevated structure. Do they care today though?
The reality is that large infrastructure projects have impacts. The problem is in this day and age everyone is convinced that you can just spend your way out of it, no matter the cost.