Rainforest
Senior Member
It is great that people have their own ideas and draw schematic concepts. I don't think there is really much knowledge out there about the practicality of building these projects and the costs. The Yonge Street Express Subway will solve the congestion on Line 1 and can readily be built cheaper than anything being proposed. I have already done the preliminary tunnel design layout and profile. Look more closely at the details on my website. https://undergroundconsulting.ca/yonge-st-express-subway
You have expertise in tunnel design, and performed quite a bit of analysis. However, you might want to add a transit planner to your team.
With the list of stations exactly as shown on your diagram, the new line will not provide much relief to the old Yonge line. The majority of downtown destinations, perhaps a good 80% of them, are located between Bloor and the Gardiner. But, you have no intermediate stations between Mt Pleasant and Lake Shore.
That means, riders from the north will use your new express line to reach the Mt Pleasant interchange, and then transfer to the old Yonge line to reach the stations they actually want to reach. The busiest sections of the old Yonge line, those south of Bloor and immediately north of Bloor, would still have to carry almost all riders coming to downtown from the north.