Autonomous cars used en-masse will need a lot of infrastructure.
If the existing technology is that good, why are we about to spend billions on infrastructure and signalling etc. for HS2 which presumably will have highly trained licenced drivers...and run on rails! - early 19th century technology..... Cars are late 19th century technology and have barely changed in a century. The methods of propulsion, control and stopping them is the same as it ever was and they have no infrastructure to speak of, in the main sharing what is there with bicycles, pedestrians, horses and much other just as they have since day one. Politicians the world over are obviously hoping that a few geeks can fix all this with a box of switches screwed to every car, but I fear that they will have a very long and disappointing wait...