Organizations like AAA and the Foundation for Traffic Safety as well as the Automobile Association in Great Britain periodically commission studies on aggressive driving.
Why? Because aggressive driving is a major contributor to car accidents around the globe.
One such study researched incidents of violence that involved car accidents and the actual use of vehicles as weapons. Only the most violent incidents which resulted in a police report or newspaper article were studied in this particular survey (these events make up only a small number of the aggressive driving events actually occurring in the U.S.).