I present to you the Second Avenue Subway [1]: > The $6 billion price tag for phase two works out to $2.2 billion per kilometer. That would make it the world’s

I present to you the Second Avenue Subway [1]: > The $6 billion price tag for phase two works out to $2.2 billion per kilometer. That would make it the world’s most expensive subway project on a per-kilometer basis, narrowly surpassing phase one of the Second Avenue Subway, which clocked in at “only” $1.7 billion per kilometer. Let's compare that to Crossrail, which goes under London, a 2000+ year old city notorious for hitting Roman ruins where the only real solution is to dig deep (ie even more expensive) [2]: > Crossrail was built in the heart of London to similar standards to New York Projects at $500M per mile. [1]: https://www.vox.com/policy-and-politics/2017/1/1/14112776/new-york-second-avenue-subway-phase-2 https://www.vox.com/policy-and-politics/2017/1/1/14112776/ne... [2]: https://tunnelingonline.com/why-tunnels-in-the-us-cost-much-more-than-anywhere-else-in-the-world/ https://tunnelingonline.com/why-tunnels-in-the-us-cost-much-...