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A comment on Tunnel Boring Machines (2018). Parent comment

Re:Tunnel Boring Machines (2018) by asjw on Monday November 18, 2019 @03:27AM (#21562742)
Many cities cannot support building more tunnels.

And tunnels cost a lot of money anyway and aren't built overnight

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Re:Tunnel Boring Machines (2018) by simonh on Monday November 18, 2019 @06:09AM (#21563365)
If only someone was working on new ways to rapidly build tunnels at dramatically reduced costs.
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Re:Tunnel Boring Machines (2018) by bluGill on Monday November 18, 2019 @08:50AM (#21564258)
People are working, but the laws of physics and geometry limit what they can come up with.
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