Right after 9/11, people around San Diego were driving badly as though they were completely distracted (which they probably were. Getting on the freeways was hell because no one saw you.
As the country started to unite, flags flying, driving conditions got better. People were polite to each other on the road, and obeyed the basic laws. There were still those who couldn't figure out that a red light meant stop, but they will always be with us.
Now, six months after the event, I have noticed that road rage is increasing. Horns are honked for no reason at all and constantly, people are cutting off each other, trucks merge without looking. Perhaps it is the state of the economy? Or something else?