That is the sales pitch. The reality is that the tunnel is no shorter than before and the original plan spaced out stations over the length of the line maximizing its benefit. The original plan was to have a station built into the bottom of a developments right in the middle of a new Richmond Hill Centre.
But you're missing the point, actually - the tunnel is, relatively speaking, a sunk cost (no pun inteded).
The savings are coming from taking 2 underground stations ($250-$400M each) and putting them above ground.
As for the locations of the 2 stations, the Langstaff site has moved to a site that will promote MORE intensification and the difference with the RHC station is negligible at best. Whether it's literally in the basement of some building or a 30-second walk doesn't make any funcitonal difference and I think it will become clear over time the extent to which even more money is being saved by these locations. Read what the government is doing Ontario Line with the Transit-Oriented Communities program, for starters.
Now, there are two competing nodes. The subway line, GO transit, and bus routes from all over York region take people to a station in the middle of highway 407 south of a hydro corridor and a transfer to take one stop, or a walk that is the distance that justifies building a subway extension and station supposedly, will be required to get to the new urban core which was supposed to be the primary employment hub.
I think this is trying to see a worst-case scenario and kind of misunderstanding the land use planning issues here.
Firstly, they are not competing. One is in RH and one is in Markham and they each have plans that are complimentary,
Neither do the GO ("express service to Union" for $X) and TTC subway (slower service through the core for $y) compete in any respect. They are, again, complimentary.
It's true that 450m is relatively close spacing but it seems less so when you appreciate how harsh a barrier the highways and hydro corridor are. They are two halves of a whole that require their own stations/nodes. That was always the plan and the north-south distance hasn't changed much.
There is no single, primary employment hub. There were always 2 cores, even before the subway plan.
There will be employment uses both just south of Bridge Sation and around High Tech. None of this has really changed since the intiial TPAP and putting the Bridge station where is actually eliminates one of the key challenges Markham had: how to get people from their massive development under the highways over to the station up at High Tech (or west, over to Yonge Street).
As for Cummer, yes, it had some decent numbers and if they were building one more station, that'd be my pick. But, as has been discussed here before, the reasons Clark was favoured are clear: I forget the exact % (it's a few pages back) but there were very few new residents/riders on Yonge who could walk to Cummer who were not already walking distance to Steeles or Finch. Clark, on the other hand, benefits from its isolation and spacing between Highway 7 and Steeles. There are always trade-offs.
There is no magical savings from going above ground..
There's nothing magical about it: clearly there are savings when every underground station costs hundreds of millions of dollars and every surface station is a fraction of that
there is savings from getting rid of stations, from building a station on property owned by the government wedged between Highway 7 and 407, and the strong motivation to find enough money to put a station at High Tech because well connected developers own property there. The goal of all of this was to create more development ready land at the expense of benefit to the transit user. At no point was there a question that High Tech would be included... just look at who owns land around there.
I don't have to look; it's all Metrus, which is the DeGasperis family
But more to the point, by Provincial law (Places to Grow, via the Planning Act), it's a designated urban growth centre, so that seems to be relevant too. And, again, don't assume that some of that development money won't be coming back to taxpayers. That's fundamentally what the province is trying to do now, at every station. The more development, the more return on investment; at least in theory.
I think people here have a general sense of what upzoning/development is planned for these 2 stations (though, back in the day, I had to post the renderings of Langstaff and RHC a dozen times to make the point). I don't think that's the case with the broader public (forget TORONTO, I don't think most local residents really know!) and certainly the Ben Spurrs and David Hains of the world weren't out there providing that context yesterday. It's not going to appease people who are determined to get their backs up any time they hear about a suburban subway but I think there will be eyebrows raised when people see what's actually planned and getting built around these 2 stations. People will be thankful Clark is only adding a few more riders when they see what's going on north of it