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I am confused
I am confused by your proposal.
It almost sounds like you are advocating a different grade coming into town than leaving. That can't be right, can it?
While you don't mention a limitation, you must not be discussing mountainous terrain. I know of some roads where it would take 30 miles of approach road building @0.7% just to get to where the road starts up the mountain. Surely you didn't mean that, did you?
You seem to imply a connection between mass production and road building. I am under the impression that roads can not be mass produced - that they are built "in situ", that is, in place. What am I missing here?
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