Don't forget that in Atlanta, a flashing turn signal means speed up, someone is about to get in front of you! I don't know where all of the bad drivers there comes from, because nobody is originally from Atlanta.
So far, in my travels, the best drivers seem to be in Minnesota, they keep at or above the speed limit, they don't ride in the fast lane, they pass and get back over in a reasonable time. The worst drivers I have run across, believe it or not, is not in Florida, but in Chile! And they even drive on the right side of the road.