[oh_sigh]

Keep in mind that the Paris metro has 0% reliability if you need to ride it between 2AM and 5:30AM. Or rather it is 100% reliably not running during those hours. NYC could probably boost those numbers if they could do track maintenance during guaranteed non-running hours.

[untog]

NYC can already do that: it's not uncommon for express lines to be shut down overnight for work to be completed, for example.

(the entire system is shut down overnight right now anyway)

[buybackoff]

I was talking about the scheduled time - when it must work, but it doesn't.