> the demand [..] It's already there, there's just no supply for it. This is the case if those people do not take alternative form of travel, a single subway c

> the demand [..] It's already there, there's just no supply for it. This is the case if those people do not take alternative form of travel, a single subway can take hundreds of cars off the street, even in car-centric suburban hellscape (I am showing my bias here) there are secondary longer routes. In terms of congestion demand is very path-specific.