Paleo
Active Member
Whether it is worth it depends on how much later. There is a huge cost to upsizing infrastructure when the need doesn't materialize soon enough - and keep in mind that maintenance cost grows significantly after what, 30 years?
The funny thing is building an LRT is probably the BEST way to ensure you see subways - the increased accessiblity will create pressure for densification, which could very well lead to undercapacity and necessiates improvement. That's partly how all Yonge and Bloor lines came to be.
AoD
You'd be stuck with the debt/financing for decades, the large operating subsidies which could continue indefinitely and the invisible lost opportunity costs from the more pressing projects that could have been done with that capital and operating money.
The Sheppard line is already an albatross, all day GO service with proper fare integration on all lines plus Eglinton line will kill it.
It will never be fast enough for crosstown express because building an underground rail line with stops at each 3-4km is extraordinarily stupid so stop dreaming about using it for that. Reviving GO-ALRT for this purpose makes 1000x more sense.