The National Highway Traffic Safety Administration (NHTSA) defines aggressive driving as "the operation of a motor vehicle in a manner which endangers or is likely to endanger persons or property." NHTSA estimates that one-third of all crashes and two-thirds of resulting deaths involve some kind of aggressive driving behavior. These are some of the actions considered aggressive:

• Speeding
• Running red lights
• Failure to yield
• Following too closely
• Unsafe lane change
• Failure to obey traffic control devices
• Failure to use proper signals
• Improper passing
• Failure to obey railroad grade crossing warnings
• Failure to stop for a school bus