If applied correctly this could solved a lot of traffic problem. I still don't understand why cars don't have a retractable bar under them. So you normally drive everywhere, but big roads like highways are in fact rails where your car gets on.
Possibly because the necessary switching apparatus would be a nightmare with modern technology, and would have been entirely unworkable even 20 years ago. That said, it's a really good idea, and one which I would like to see attempted - or at least a good explanation of why it would be completely crazy on a technological level.
Yeah, you blend your maps data with a bunch of sensors together and you have a self driving car. It's just a matter of speed and the other drivers + knowing where your going.
