zlacker

The London underground was created in 1863 though: https://en.wikipedia.org/wiki/London_Underground

Though I suppose you would have to look at the state of thr system in the 1980s. NYC may have had more deferred maintenance.

>>graeme+(OP)
One major thing is probably that the NYC subway did 24 hour operation (recently stopped due to covid-19) so there wasn't an easy period for maintenance tasks where the London Underground seems to run 5am-12am so there's a nice 5 hour block for maintenance.