Road rage can be described as an "An incident in which an angry or impatient motorist or passenger intentionally injures or kills another motorist, passenger, or pedestrian, or attempts to injure or kill another motorist, passenger, or pedestrian, in response to a traffic dispute, altercation, or grievance."
On average, at least 1,500 people are killed or injured annually as a result of highway violence. In 1990, there were 1,129 reported incidents of aggressive driving. The following year, this rose to 1,207 incidents, while in 1992, 1993, 1994, and 1995, the figures were 1,478, 1,555, 1,660, and 1,708, respectively.
But most of these reports are based on the police reports and the media stories but the exact number of the incidents are yet unknown. As majority of them are not reported or not violent to come into lime light.
Road rage can be caused by variety of reasons the driver might be frustrated with the traffic, with tailgating, horn or any other thing but if not controlled the frustration it can lead to severe consequences of fatal injury or death.