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I don't think the areas suitable for this treatment are enough to create a standard for the rest of the planet. Out here, it's gently rolling hills and maybe a hundred vehicles a day. We are lucky to get a moderately uniform surface.
I put in a proposal for a planned community on a hillside once. I recommended that all roads angle up-slope to either left or right, at about 2% grade. This would produce rhomboid grid sections. Going straight up the slope would be a T-bar powered by a stream coming down. Anyone on a bicycle could leave anywhere in town, coast down toward a T-bar, ride it up, and then coast down to any other destination.
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