Government willingness to piss off people combined with the fact that the wealthier people were mostly unaffected. Highways destroyed the poor areas of most ci

Government willingness to piss off people combined with the fact that the wealthier people were mostly unaffected. Highways destroyed the poor areas of most cities and enabled the suburban housing boom. There were a few successful attempts to stop the encroachment of the federal highway system into cities. I think the Bay Area was one of the first such victories.