either that or NYC is just really inefficient in terms of cost. Keep in mind you've cited probably the first or second most expensive mile of any subway ever b

either that or NYC is just really inefficient in terms of cost. Keep in mind you've cited probably the first or second most expensive mile of any subway ever built, and subways usually cost much more than other trains. China regularly builds high speed rail for $30M per mile. Europe is usually closer to $50-60M. Tokyo has built subways for $400M 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-...