Good point, I was assuming Progress, near the current route. McCowan would certainly be cheaper, but would fail to serve those along Progress ...
True; but Progress / Centennial campus will continue to be served by buses, it is not a very long trip.
On the other hand, people who board SELRT between Agincourt and McCowan and want to get to BD subway, can easily do so if a connection goes via McCowan and there exists a dedicated branch of LRT that serves such route. That will make SELRT more useful. (If the connection is at Sheppard / Progress as in the SLRT plan, then they have to go east all the way to Progress and then backtrack west; or, just take a bus.)
Moreover, McCowan LRT can go further north into Markham (Hwy 7 / Markville Mall).
... which also raises the problem of eliminating service along the current RT route - particularly to the relatively well used Lawrence East/Kennedy area.
That depends on the route selected for subway. If the current SRT alignment is reused, that probably requires a complete rebuild of the Kennedy station and the Ellesmere - Midland curve, but the Lawrence East station will be preserved.
If the subway is built on a new alignment (a better choice IMO), then the current Lawrence East station will not persist, but a new Lawrence station will be built at Brimley or McCowan. To serve the local cluster at the current Lawrence East, they can just run a special express bus route, Kennedy Stn - Kennedy northbound - Lawrence eastbound - Midland southbound - Kennedy Stn. Just 2 or 3 vehicles can provide a decent service, and the cost of those will be negligible compared to the benefits of choosing the best subway alignment.
Another possibility is to add a Lawrence East GO station.
I'm not sure why a mode change at STC is any more acceptable than at Kennedy. And if the LRT become surface, then travel times from the Sheppard/Markham Rd area will be significantly longer with the subway extension to STC than they are with the current plan.
Indeed it doesn't matter if the mode change is at STC
or at Kennedy; what I meant is that they did not want a mode change at
both STC and Kennedy. So, by retaining the mode change at Kennedy, they force themselves to continue the fully grade-separate and therefore expensive SLRT well beyond STC.
The travel times from the Sheppard/Markham Rd area to STC will be longer on the surface LRT, but not dramatically longer. It is probably 10-12 min on surface LRT, vs 5-6 min using SLRT guideway.
But other group of riders from Scarborough (not from the Sheppard/Markham Rd area) will probably benefit more from the subway extension. If they arrive on Lawrence East, Ellesmere, Brimley, McCowan buses and want to get on BD subway, they will see one transfer removed if the subway is extended.