Of the 3,000+ drivers surveyed, 61% of women said that they had experienced road rage, compared to 56% of men. And roughly 9% of commuters have actually gotten into a fight with another commuter. Wow, that's a higher number than I would have thought. I'm too lazy to even go through a drive through to get food, I can't imagine the effort it would take to get out of my car and engage someone in a fight.
CBS Baltimore has more of the study's findings.