I really wonder about the situation most of us have been in where we are driving at a safe distance only to have some clown squeeze in front of us. Most drivers realize that if they leave a safe gap it will happen again and again and they are constantly slowing to open the area in front of them.
So how about an autonomous vehicle? I have to assume they aren't following at 3 feet or something just because they have mind numbingly fast reaction times. So if they are following at something resembling a normal (safe) distance (for a human)...how do they deal with constantly slowing to re-open that gap?
The logical progression of this is that the people behind this automated vehicle will start getting pissed off since it keeps slowing down every time someone pulls in front of it. Their response: go around and pull in front of it...duh. Eventually there won't be anyone behind the automated car. Problem solved...I guess.