|Much of the problem dealing with the issue of private 'highways' is that all this is to be an imposition on a pattern established by the collectivist mentality. This is to say, in a land wherein property was sacred, and no eminen domain existed, the whole pattern of development would have been different, and the listed problems would have not come into being, any more than those problems exist within selected communities now being developed, wherein the roads, like the houses, are all patterened within the developer's 'domain' as it were. Now, would this mean no 'superhighways' would have been developed? Not at all, as James Jerome Hill showed as possible when he built his railroad across the upper part of the midwest, without tax money and without eminen domain. As for the present day, probably the best way would be to transform the tax highways into toll ones, by selling them off to those interested, and absolving any eminent domaining of them in the future.
As for the military, that, too, was predicated on the collective mindset - unlike other, individualistic constructs, and thus engendered a viewing of moving about similar to that of Ancient Rome, not of the world today. Remember, the ability of such moving goes both ways - friend and foe, and if there is little of paved pathways, then foe is equally - if not moreso- stymied of it, and forced to use other means.