San Diego
Slamming on the brakes and speeding are among San Diegans primary offenses when it comes to the ingredients leading up to and resulting from road-rage incidents. They're also just as likely as New Yorkers to curse out others whose driving they object to. San Diego's appearance in the No. 10 slot reflects a big tumble for the city, whose drivers ranked as the ninth-most-courteous a couple of years ago. Also notable is that San Diego beat out both Los Angeles and San Francisco, which tied for 11th place in the most courteous drivers category.

In Dog Beers, I've had one.