Road rage
Road rage is behavior by a driver of an automobile or other motor vehicle which causes collisions or incidents on roadways. It can be thought of as an extreme case of aggressive driving.
The origins of the phrase can be traced back to when it appeared in an article in the Los Angeles Times. An example of its use in print in 1988 can be found in an article in the Florida's St. Petersburg Times, which reads: "A fit of 'road rage' has landed a man in jail, accused of shooting a woman passenger who's  car had 'cut him off' on the highway."

# Manifestation
The following are common manifestations of road rage:
- Generally aggressive driving, including sudden acceleration, braking, and close tailgating.
- Cutting others off in a lane, or deliberately preventing someone from merging.
- Sounding the vehicle's car horn|horn or flashing lights excessively.
- Rude gestures (such as "Finger (gesture)|the finger").
- Shouting verbal abuse, obscenities, or threats.
- Intentionally causing a collision between vehicles.
- Exiting the car to attempt to start a confrontation, including striking someone else's vehicle with an object.
- Threatening to use or using a firearm or other deadly weapon.
- Throwing projectiles from a moving vehicle with the intent of damaging other vehicles.
In the United States|U.S., more than 300 cases of road rage annually have ended with serious injuries or even fatalities  1200 incidents per year, according to the AAA Foundation study, and rising yearly throughout the six years of the study that examined police records nationally.

# Legal status
In some jurisdictions there may be a legal difference between "road rage" and "aggressive driving." In the United States|U.S., only a few states have enacted special aggressive driving laws, where road rage cases  about 1,200 a year  are normally processed as assault and battery (with or without a vehicle), or "vehicular manslaughter" (if someone is killed).

# Road rage as a medical condition
As early as 1997, therapists in the United States were working to certify road rage as a medical condition. It is already an official mental disorder in the Diagnostic and Statistical Manual of Mental Disorders. According to an article published by the Associated Press in June 2006, the behaviors typically associated with road rage are the result of intermittent explosive disorder. This conclusion was drawn from surveys of some 9,200 adults in the United States between 2001 and 2003 and was funded by the National Institute of Mental Health.
The cause of intermittent explosive disorder has not been described to date. There are many different views on whether "road rage" is a mental issue or not. However, whether it is or isn't, there are many alternative solutions for overcoming this handicap.

# Penalties
Road rage is a relatively serious act: It may be seen as an endangerment of public safety. It is, however, not possible to judge intent by external observation, so "road ragers" who are stopped by police may be charged only with relatively minor offences such as careless or reckless driving.
It is likely that those causing serious injury or death during "road rage" incidents will suffer more serious penalties than those applicable to similar outcomes from simple negligence. In April 2007, a Colorado driver was convicted of first-degree murder for causing the deaths of two motorists in November 2005.  He will serve a mandatory sentence of two consecutive life terms.
Only 14 U.S. states have passed laws against aggressive driving. Only one state, California, has turned "road rage" into a legal term of art by giving it a particular meaning.

# Websites about road rage
Due to public concern about road rage and the growth in online forums, several websites have been created for users to share incidents of road rage and share strategies for dealing with it.
In 1999, the original Road Rage @ RoadRagers.com began. Originally created by a Canadian, Mark Nelson from Winnipeg, Manitoba, this was the first significant website on the subject and is still referenced in the mainstream media. It continues to provide resources on driving style analysis, a road rage quiz, polls, and advice. It also has provided bad driver and road rage reports allowing visitors to vent and contribute to the database of bad drivers by entering their license plate number and other information. RoadRagers.com remains a complementary foundation to the other sites that followed.
In 2000, AboveAverageDriver.com was started as a place to report bad driving by their license plate and vent online. This site allows registered users and unregistered users to report on unsafe drivers around the world but mainly caters to drivers in the US. The site is in its 7th year now, providing a number of statistics to an ever growing community that host a number of reports and search capabilities on good drivers and bad drivers.
In 2003, BadDriving.com was launched by a two programmers base in England, Paul Cooper and Gareth Nash. The site provides an outlet for road rage by offering a forum discuss UK related driving issues and also a driving report database to record bad driving incidents on the road. In 2007, the site expanded to the include driving reports in the US.
In 2006, PlateWire.com was launched by a Virginia programmer, Mark Buckman. This site offers a communication system for drivers to communicate using their license plate as an identifier. Users can "Flag" bad drivers, "Award" good drivers, warn drivers of vehicle hazards, or send a flirtatious "Wink." PlateWire also offers a toll-free number for members to call in reports. PlateWire has also spawned PlateXchange which enables license plate reporting websites such as PlateWire to share and propagate license plates posted.
In 2007, PlateRage.com was launched. It is an online community that allows users from around the world to vent their road rage and report other license plates in a non-physical, non-violent way. Users can also call in their road rage on the go to a 1-800 number "rage line" that uploads to the site.
In 2008, YourPlates.com and YourPlates.mobi was launched by programmer Andrew Phipps of Platester.com and PlateState.com and programmer and ex-Iraqi War Veteran Andrew Couch of Las Vegas.  It is a license-plate based online social networking and messaging community where drivers can send messages and view messages online as public or private.  Members may post a message of road rage to another driver, other members may view those messages to an unclaimed license plate.  All license plates are virtually members.  Members may search for profiles by license plate or create profiles by license plate.  YourPlates.com has created a downloadable widget for MySpace users where they can access the features of license plate messaging directly from their MySpace page.  Angry drivers, and Road Ragers use YourPlates.com to share their frustrations in a digital age.

# U.S. rankings
A 2007 study of the largest U.S. metropolitan areas concluded that the cities with the least courteous drivers (most road rage) are Miami, Phoenix, Arizona|Phoenix, New York, Los Angeles, and Boston. The cities with the most courteous drivers (least road rage) are Minneapolis, Nashville, Tennessee|Nashville, St. Louis, Seattle, and Atlanta.