Putting roof-level railways underground?
It is a fairly obvious feature of railways south of the river that
many run at roof level.
I once got into correspondence with somebody who said "It is the
long-term objective to put these routes underground".
I felt like asking "Are you on the same planet as me? The cost
would be astronomical, and for what benefit?", but I let it drop.
Is this REALLY a serious proposition?
Michael Bell
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