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Interesting thought experiment. Assuming the line is 1/4 mile wide, it would have the same area as a city with a 5 mile diameter, so slightly smaller than SF.

I would like to hear the proposed advantages of the design. One advantage that comes to mind is that the entire city could run off of a single transportation corridor. Also a line has the maximum perimeter to surface area. Maybe this is relevant for expansion?

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It’s one arterial road. I have lived in a city like that. The first arterial road has homes and businesses and then as population grew, new parallel roads are built.

But now we have to have inter city and intra city transport as two diff systems. What I suggested was to have inter city mobility underground and intra city transportation over ground..and many cities can be joined and networked like so.

5 mile diameter ~ 20 mi^2.

SF is proverbially 7x7 = 49 mi^2.

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