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London's 2 mile northern line extension costs about $1.7b, so doesnt sound out of whack. Berlin did extend the U5 about 1.4 miles for $600m but it's the right o
by iso1631 6y ago
London's 2 mile northern line extension costs about $1.7b, so doesnt sound out of whack. Berlin did extend the U5 about 1.4 miles for $600m but it's the right order of magnitude.
- cwhiz 6y agoI was wrong. The latest expansion was $3.5 billion per mile. https://www.nytimes.com/2017/12/28/nyregion/new-york-subway-construction-costs.html https://www.nytimes.com/2017/12/28/nyregion/new-york-subway-...