No one has mentioned the idea of having double-decked stations to make it so you don’t have to worry about moving to the right floor in advance of your stop.
I would posit this as a given if we bothered to make taller tunnels for taller train-cars, but based on other comments here, I’m not sure this idea actually makes the concept of double-decker subways any more sensible or useful.
It looks like those metros that have a use for the idea have made it work in their own way and places that haven’t tend to have significant reasons of their own for not going this route. Enlarging existing tunnels vertically seems to be a non-starter in most places, for instance.
No one has mentioned the idea of having double-decked stations to make it so you don’t have to worry about moving to the right floor in advance of your stop.
I would posit this as a given if we bothered to make taller tunnels for taller train-cars, but based on other comments here, I’m not sure this idea actually makes the concept of double-decker subways any more sensible or useful.
It looks like those metros that have a use for the idea have made it work in their own way and places that haven’t tend to have significant reasons of their own for not going this route. Enlarging existing tunnels vertically seems to be a non-starter in most places, for instance.