This is the dream of the city dwelling controlling leftist that wants everything humans do to eventually become urban, environmentally perfect rats. I have not kept up on it, but some years ago the eventual goal seemed to be cities in perfect order around a hub where everything was environmentally perfect.
Back in the '60s, when I was at Disneyland, we were constantly "treated" to progress on Disney's new EPCOT (experimental prototype community of tomorrow). It was eventually built (the first one) in Florida, but as Walt died, the project never became one of a real public project. Disneyland's monorail and people mover are some of the modes of transportation that would have been utilized in communities like this. This type of electric car would have fit in perfectly.