NYC Subway Was Delayed by 1930s Signals. A Fix Is Finally Coming

“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