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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First line built in 1969. Two lines by the time I was born, 20 yrs later. 4 by the time I graduated high school. 13 by college graduation.
Shanghai's subway is even younger than me--first line opened in 1993. Grew slowly, then very quickly
#TrainTwitterpic.twitter.com/1RHQ53eoRY
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
Love it!
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