And in London, the Underground closes down altogether overnight, except for some lines running on Friday and Saturday nights. (And that Night Tube service is a relatively recent innovation, starting in 2016.)
It is amazing in general and I hold to the idea that London has one of the finest public transportation networks in the world.
Lived there 5 years and eventually I came to the analogy that the buses were like red blood cells running through the streets distributing people. The metro trains and even taxis formed a sort of almost circulatory system for the city, with the humans being little cells being carried at varying speeds through different veins and vessels.
And I think the health of a city sort of depends on its circulatory system. Where I come from the system doesn’t cover the city adequately and that creates pockets of inequality, problems, low access to the centre. London is highly productive because of its excellent circulatory system.