You are better off building the Yonge Line to Steeles today than wait until the DRL gets to Eglinton.
The extension should had happen when that extension was built in the first place, since the ridership was there then.
By building the extension today, it does a number of things that will benefit everyone.
With the Steeles station in place, both TTC and YRT can remove buses that get caught up in traffic from Steeles to Finch and still offer the same quality of service. Riders save travel time both way. Traffic will have no buses to deal with and allow the plan to move forward to reduce the number of lanes and add bike lanes.
Since there is no real plan in place for adding parking spaces at Steeles, the 905 riders will still have to drive to Finch.
I have never had an issue of building the extension to Steeles, but do to RH.
A cheap way to quickly get the YNE built is to expedite the DRL build all the way to Richmond Hill:
If the DRL reaches Oriole station:
If DRL reaches Oriole GO stations, then:
-- South of Sheppard: DRL could be a tunneled subway
-- North of Sheppard: DRL could use the Richmond Hill GO corridor
-- No GO stations lost (all Richmond Hill GO stations are at Sheppard or north of)
-- DRL replaces Richmond Hill GO train service.
A cost-effective DRL extension all the way to Richmond Hill instead -- while simultaneously upgrading Richmond Hill GO into a metro.
The DRL would actually be a faster trip than the slow wind-through the Valley, and would be superset of Richmond Hill GO line.
I left the question of Langstaff and Richmond Hill open -- it could terminate in Richmond Hill (serving both stations)
Obviously, there are pros/cons with this but it is apparently talked about as one of the options -- that sometime north of the Sheppard Line, the DRL switches to the Richmond Hill corridor north of Eglinton, taking over all of the existing Richmond Hill GO stations all the way to Richmond Hill.
Grade separating the corridor all the way to Richmond Hill -- might be cheaper than tunnelling all the way from merely Sheppard Subway to just Sheppard -- and provide more benefits.
It is very difficult and not very effective to put GO stops deep in the valley, so the DRL ends up becoming a bypass for Richmond Hill GO line! (i.e. south of Sheppard = Subway to Oriole, then north of Sheppard = Subway goes over Richmond Hill GO corridor serving existing GO stops instead of the GO trains).
Some caveats of this approach would be that potential future Ontario Northlander trains would not be able to reach all the way Toronto Union. So there would need to be some quid pro quo like making a very nice transit interchange at, say, Langstaff that serves 3 major rail lines (YNE, DRL, and all northern train routes), or a 3rd track between Langstaff and Sheppard, to allow traditional-rail trains to continue to Union (especially if keeping the existing Richmond Hill GO service). The conversation is needed.
While a transfer ends up being needed for anyone travelling southwards from north of Richmond Hill -- most people who take the train to Union needs to transfer to other destinations anyway, and if a compact intermodal terminal (
407 buses, DRL subway, YNE subway, northern trains, etc) is built in place of Langstaff or Richmond Hill, then the transfer there can be made less painful than a transfer at Union! On average, the region would win. So the eye is in the beholder.
The conversation may take a while, but if you needed to do something cost-effectively, this may be one of the many options.
Especially if the premier is trying to cut costs and getting maximum suburb benefits -- maximum stations and maximum service -- for the lowest cost.
With the DRL cheaply reaching Richmond Hill, there becomes 2 separate subways that reach downtown, and the DRL becomes much more of a true relief line option:
--> DRL connects Line 1 Yonge Line at Richmond Hill
--> DRL connects future 407 rapid transit
--> DRL connects future Steeles rapid transit
--> DRL connects Line 4 Sheppard Subway at Oriole
--> DRL connects Line 5 Eglinton Crosstown LRT
--> DRL connects Line 2 Bloor-Danforth at Pape
--> DRL connects Line 1 Yonge-University at Queen & Osogoode.
This may be a way to help justify the build of the Yonge North extension a little bit more quickly.