Quote:
Originally Posted by Bicycle Bob
A tube does not have to be buried to be evacuated.
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True enough: my idea on that was to get it out of the way of other stuff, for what I assume is the same reason (but even more so) that the original concept was elevated on pylons.
As for trading fuss for savings, I don't think the original concept does that. I'm a great fan of trains in their proper place, but that place is where you have lots of people wanting to get from one place to another. Building all that dedicated infrastructure to move just a few passengers seems counter-productive, especially as you'd have to have some other way (roads?) to move heavy/bulky objects.