top | item 37049143 (no title) Rescis | 2 years ago Several hundred million dollars at best gets you a mile of subway in an American city: https://www.vox.com/22534714/rail-roads-infrastructure-costs...Experimentation with alternatives is desperately needed. discuss order hn newest stuaxo|2 years ago His whole thing for a while was how it was going to be cheaper to dig tunnels by using new techniques etc, that would equally apply to subways - but a feel like it was probably bullshit. s1artibartfast|2 years ago The new technology is smaller drills that make smaller tunnels.They are electric and can start at street level and dig themselves down. load replies (1)
stuaxo|2 years ago His whole thing for a while was how it was going to be cheaper to dig tunnels by using new techniques etc, that would equally apply to subways - but a feel like it was probably bullshit. s1artibartfast|2 years ago The new technology is smaller drills that make smaller tunnels.They are electric and can start at street level and dig themselves down. load replies (1)
s1artibartfast|2 years ago The new technology is smaller drills that make smaller tunnels.They are electric and can start at street level and dig themselves down. load replies (1)
stuaxo|2 years ago
s1artibartfast|2 years ago
They are electric and can start at street level and dig themselves down.