Originally Posted by
mecabq
Agree about New York's express system. Brilliant innovation that, despite its age, doesn't seem to have been replicated anywhere.
That's why it's one of the only, if not the only, subway system that runs 24/7.
I'm sure I have many more systems to try but out of the below systems I've been on, Istanbul, Lisbon , Paris, Singapore, HK, Chicago, Copenhagen
I think have an ease of access between the international airport and the main tourist areas . The other are convenient mostly for traveling in the main tourist/central areas, I think.
Istanbul, Paris, Mumbai, Delhi, Singapore, Hong Kong, Chicago, Washington D.C., Montreal, Copenhagen, Sydney, Bucharest, Lisbon