University of Minnesota researchers have found the biggest jerks on the road don't act any differently when they step out from behind the wheel.
Researchers studied 710 drivers ages 18 to 45. They found the most hostile people tend to react more aggressively while driving than their less-hostile counterparts would.
The study also found hostile people are more likely to drink and drive, take more road risks and show more anger toward other drivers, police and construction delays.
The study's co-author, Kathleen Harder, says -- "People don't change their behavior dramatically when they get in the car."
Harder says the findings could lead to changes that would simmer down road aggression.