text: Not only would the car itself cost alot, it would also take millions to be able to fix all the roads in order for the car to be able to drive on the roads. In paragragh number 3 it states that the car requies magnets in the road to be able to read the messages in binary code, but would be too expensive. "These smart-road systems worked surprisingly well, but they require massive upgrades to existing roads, something that was simply too expensive to be practical."