"Road rage and roadway congestion are familiar scenarios for millions of American drivers, and they're not getting any better. A 2006 Transportation Research Board report noted that congestion is increasing in intensity, extent and duration. Average one-way travel time for commuters in 2000 was 25.5 minutes, three minutes more than in 1990." 01-07
"Road rage is a term used to refer to violent behavior by a driver of an automobile, which thus causes accidents or incidents on roadways. It can be thought of as an extreme case of aggressive driving." 01-07