Comment by Peteragain
7 days ago
Loebner (of the prize fame) patented the idea of a rollercoaster tube system. Stations on the surface, going underground and up to the next station. Saves power and reduces the curb to platform time. Just thought I'd put that out there...
But then you'd need stations and part of the rails on the surface, taking up valuable real estate. Versus a small entrance building. Not sure how or how much it would save power either.
Some train lines are designed like this although obviously much more gradually like the Victoria Line in London. In practice it’s pretty negligible.