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oniony • last Friday at 12:41 PM • 4 replies • view on HN

It's not seven times longer. The Austrian line is 130km with 50km of tunnels.

            Length  Tunnels  Bridges   Stations   Cost
    Koralm  130km   ~50km    100       12         €6b
       HS2  230km   ~75km    100+      4          €74b+
Obviously this does not give any indication of the complexity of each project. Tunnelling and building railway through a metropolis I would imagine is quite challenging.

Replies

rsynnott • last Friday at 1:25 PM

As far as I can see, the 6bn is _just_ for the big 30km tunnel? Presumably the rest of it cost more.

shevy-java • last Friday at 12:55 PM

Still seems insanely more expensive in the UK. I understand they have a higher cost to carry because their project is indeed more complex, but that's like a almost 13x more expensive variant, while not even being two times the length.

monster_truck • last Friday at 3:24 PM

HS2 is five sets of twin bore tunnels, so there is more "tunnel per tunnel"

orthoxerox • last Friday at 1:38 PM

Sounds like you might want to build the whole HS2 underground to save money.