1. most subways don't operate at 150 MPH
2. subways stop at every stop even if the majority of passengers aren't getting on or off
3. subways can't route individuals (or small groups) directly to their destination, including via normal roads
except in new york where there are direct trains and local ones -- it's a good demonstration of why #2 is such a good idea.
1. most subways don't operate at 150 MPH
2. subways stop at every stop even if the majority of passengers aren't getting on or off
3. subways can't route individuals (or small groups) directly to their destination, including via normal roads