Beijing Subway--which barely existed 20 years ago--is now the world's busiest; has pretty wild rolling stockpic.twitter.com/8YRyt1KQSZ
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Tokyo's subway had a very slow start, then a growth surge, then slowed down again
#TrainTwitterpic.twitter.com/uUL3eWP24i
You will notice that Tokyo's subway exists as a subset of a much more comprehensive suburban rail system, unlike Shanghai or Beijing
Compare: Tokyo subway network vs Tokyo railway network (includes subways)pic.twitter.com/93MpqG8nm8
Anyone know (supposed) total cost? Curious on total investment and cost per mi/km
not sure where to find that info--but I am under the impression that cost per mile is much lower than in USA
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