The drivers with the worst road rage in the country are in Miami.
There is one noteworthy thing in the study:
Rude drivers: Miami, Phoenix, New York, Los Angeles, and Boston.
Polite drivers: Minneapolis, Nashville, St. Louis, Seattle, and Atlanta.
With the exception of Boston, all of the places with the most rude drivers have warm weather -- while the majority of places with the more polite drivers have somewhat cooler weather.