It seems to me that the best course of action would be to have separate areas for autonomous vehicles, at least at first. Kind of like express lanes on a highway. Without as much danger from human error, it should prove a much safer way to travel. If the driver needs to exit or drive into a non-designated area, they can then take control of the car and drive manually, as everyone else does.
Can anyone say "RFID jammer"..?
Not only will the pro-gun crowd say that a jammer could be used by government agencies to disable their weapons, but the bad guys could easily build a jammer for their own use to ensure their safety during commission of a crime. Imagine cops closing in with "smart guns". The bad guys flip on the jammer and cops can't do anything about it. Throw in the bad guys having traditional guns, and the cops have a serious problem on their hands. Same goes for home invasions.
I understand the idea behind smart guns, but this is a horrible idea. And as a gun owner, I'll never guy a smart gun. I've heard of fingerprint scanners being easily bypassed, as well. Unless you can tie it to DNA or something, I see no good way to produce a gun like this. And even then, it could likely be bypassed without much difficulty.
"No, no, I don't mind being called the smartest man in the world. I just wish it wasn't this one." -- Adrian Veidt/Ozymandias, WATCHMEN