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A comment on As the U.S. fantasizes, the world builds high speed rail. Parent comment
The Swiss did study something similar (https://en.wikipedia.org/wiki/Swissmetro) but their proposal looks a lot more expensive and is entirely in-tunnel.
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The Swiss did study something similar (https://en.wikipedia.org/wiki/Swissmetro) but their proposal looks a lot more expensive and is entirely in-tunnel.