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by laurencerowe 2338 days ago
It's hard for NYC's subway to run at the frequencies others manage since the system has so many branches and reverse branches. In London I believe there are plans to split the Northern Line into two separate lines to enable running at higher frequencies. The Victoria Line now runs at 36 trains per hour at peak, 100sec/train.

Conversely NYC can run trains all night because so much of the system is double tracked, letting them close one track each way for maintenance overnight.