3 ms·
> That's with 1930's signalling - with modern signalling, they could run trains every 90 seconds, for a capacity of 100k per hour. And that's just on two tracks
by djrogers 8y ago
> That's with 1930's signalling - with modern signalling, they could run trains every 90 seconds, for a capacity of 100k per hour. And that's just on two tracks.
That's an extremely optimistic number - running a train every 90 seconds would leave people basically no time to get on or off the train, and ingress/egress gets harder as platforms get more crowded.
- bobthepanda 8y ago90s is achieved on many subway lines today. Ingress/egress is mostly a function of getting the people farthest from the doors out the train and packing people in, but there are subway lines that effectively manage this at 90s. Paris Metro Lines 1 and 14 already run at this headway. That being said, it is possible for platforms to become so congested that they actually start impacting headways; the Lexington Av Line (4/5/6) in New York had this issue until recently because it was carrying more than the daily riderships of Chicago, Boston, and San Francisco's entire systems.