Unionville Subway
This is a proposal to create a TTC Unionville subway line to replace the GO Stouffville line.
It would run at grade, from Unionville Station in Markham to Scarborough Station and then in a tunnel from Scarborough Station under the GO tracks to Pape and Gerrard to meet the Relief (subway) Line. The Relief line starts from the Pape Subway station to Pape and Gerrard and then southwest to Queen Street and west under Queen to University. There will be three tracks from Pape and Gerrard to Queen and University. The Unionville subway will have the dedicated southern track, the Relief line, the dedicated northern track and the middle track is shared by both. The dedicated tracks run inbound in the morning and outbound in the evening while the return trains run on the shared middle track.
The Unionville subway replaces both the GO Stouffville line and the Scarborough Subway Extension (SSE),
The Unionville to Scarborough stretch is economical because it is at grade. If there were room on the surface of Lakeshore line from Scarborough to Pape and Gerrard for a subway line, time and costs could be saved.
Eliminating the SSE is also a saving.
Markham loses a commuter train but the Unionville subway station can serve as a hub for a bus network.
The Sheppard LRT meets this line. The Steeles, Finch, Agincourt, Lawrence stations will significantly shorten bus routes in Scarborough. Most Scarborough bus routes will run east/west to feed the subway line. As the east/west bus routes run faster than north/south routes transit times will be shortened.
Deleting the SSE lightens the load at Yonge/Bloor.
Deleting the Stouffville line lightens the load at Union Station.
Everyone I've showed it to has a reason not to like this idea.
I'm ready for more.