NYC Subway Was Delayed by 1930s Signals. A Fix Is Finally Coming (nytimes.com) 3 points by dsgerard 6y ago ↗ HN
[–] melling 6y ago ↗ “the cost estimate for installing new signals on the 12-mile-long piece of the Lexington Avenue line, at $3 billion”15 years ago China built the 19 mile Shanghai maglev for $1.3 billion. Top speed is 268 mph.https://en.wikipedia.org/wiki/Shanghai_maglev_train
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[ 2.7 ms ] story [ 14.5 ms ] thread15 years ago China built the 19 mile Shanghai maglev for $1.3 billion. Top speed is 268 mph.
https://en.wikipedia.org/wiki/Shanghai_maglev_train