The thing that boggles my mind about the tailgating is how much of it is done for essentially no reason. There aren't that many defensible reasons to tailgate to start with, but the amount of purely idiotic behavior blows my mind (I regularly see people refuse to switch lanes while tightly tailgating whatever car happens to be in front of them, all this in heavy traffic).

Perhaps the most exciting thing about self driving cars is that they will all have and use the ability to think ahead more than 5 feet.