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A billion dollars a mile is for subways though, and I'm guessing tunnelling is the major component in that cost.
by kspacewalk2 6y ago
A billion dollars a mile is for subways though, and I'm guessing tunnelling is the major component in that cost.
- bobthepanda 6y agoUnderground stations is the majority of the cost. The tunnel boring machine is relatively cheap compared to securing enough property to build stations, and it could be said that New York's recent subways have massively overengineered their stations. That being said, elevated railways have always been a very hard sell in dense areas, and ground level has its own host of problems.