I think there's a flawed premise frequently used in these transit-related threads, and that's to try and argue against LRTs by making subways into something they're not: commuter trains. The straw man invariably put forth is that streetcars can't travel quickly over 20+ km distances and therefore subways are required.
At the risk of stating the obvious, streetcars travel in mixed traffic while ROW LRTs do not. Stop spacing and the frequency of traffic lights are what ultimately determine how fast a ROW LRT can get.
Similarly if commuter trains are what's logically required by the basis of this premise, it's illogical to push for subways since, ownership issues aside, virtually all of the rail infrastructure is already in place and it would be far more cost effective to simply add commuter trains and enhance stations and transfer connections.
Realistically, a mix of ROW LRT, subways and commuter trains will probably be needed in the not too distant future. And bear in mind that the first and the last of these three will be by far the most cost effective to build.
McGuinty won't use his political capital to formally reinstate Transit City. Such level of the Provincial involvement into the City's matters is legally possible, but does not fit the traditional division of powers and would be pretty hard to explain to the general public (that does not see transit as the #1 issue anyway), or even to his own MPPs.
McGuinty won't do anything unilaterally. But as Mihevc seems to suggest in that article, it's entirely open to Council to formally reinstate more or all of it. If passed by Council -- even over its mayor -- McGuinty would likely feel obliged to respect its will.
So this could potentially get very interesting.
Any street that had its frontage developed prior to WWII, I can almost guarantee it won't be wide enough, unless it was specifically designed with a boulevard or something, which isn't very common in Toronto.
This is where Jarvis could potentially enter the discussion: it's quite arguably the only major street between Yonge and the Don River where you have a little extra space, albeit probably not quite enough.
Is there enough courage among any of our councillors to put a ROW down Bay, Jarvis or Church at the expense of two lanes for cars, even if it would likely help take some pressure off the Yonge line?
Certainly not right now, but after another 2-4 years of stasis and increasing gridlock? Who knows?
So what is the issue with having underground LRT where it is required, such as the older and narrower parts of the street, and then above ground ROW?
Well we come right back to the question of where to get the money for the tunnelled part.
I think we're in a position where our transit needs are far too great and the available funding is far too little.
Rather than embrace a particular mode of rapid transit, I'd argue in favour of creating a shoestring budget model that starts with eliminating cars from some of the existing downtow streetcar lanes, opening the midtown line, and running short turn GO trains within 416 at 5-minute intervals. And then upscaling each as funding and ridership allows.
It looks to me like having several mega-budget items competing with each other is the best recipe for ongoing paralysis.