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by fyfy18 2928 days ago
If they can really do it for that price, that’s impressive. In London one of the tube lines is being extended by 3.2km and it will cost $1.6b (£1.2b):

https://www.london.gov.uk//press-releases/mayoral/nle-tunnel...

London is relatively easy to tunnel in, and as it’s an extension existing rolling stock will be used (so no development or purchase costs).