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monster_truck • last Friday at 12:39 PM • 2 replies • view on HN

7x longer for 11x the cost seems pretty good all things considered.

Always thought it seemed like a waste to not also dig out a bunch of storage while we're down there. I'm sure there are good reasons we don't

Replies

oniony • last Friday at 12:41 PM

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.
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IshKebab • last Friday at 12:44 PM

Yeah because it would be extremely expensive and we don't need it.