All it will take is one major accident/fatality and it will all come to a screeching halt. The company "responsible" for the accident will be tied up in litigation until they either go bankrupt or give up. The general population will not trust the system and refuse.
I believe we'll see a shift towards automous in my lifetime, but it will start with big cities, and HOV type lanes on interstates, but you would still drive your car to those points where the computer takes over.
I haven't read every post, but did anyone mention the personal property aspect? I saw mention of regular cars being illegal, etc. That's my personal property I worked hard to pay for, I'm not going to give it up. Is the guvment going to "buy it back"? At what price? Where does that money come from? Retrofitting existing cars? What if you can't afford it?
And, if human driven cars ever did become illegal, you know ol' Bo (or Leroy on Dontrell) is gonna have that old muscle car stashed in the barn and go raise hell with the bots...