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Automated traffic law enforcement

Traditional traffic law enforcement relies exclusively on the presence of an officer to observe violations and identify and cite offenders. Obviously, this limits the effectiveness of traffic law enforcement because police cannot be everywhere. Even when they observe violations, it is not always possible to safely stop the violator because to make the stop, the officer may have to speed or run a red light. Red light cameras and other photo-enforcement systems are designed to identify traffic law violators without depending on the presence of police officers. Red light camera systems are connected to traffic signals and to sensors buried in the pavement at the crosswalk or stop line. The system continuously monitors the traffic signal and triggers the camera to photograph the tags of vehicles entering the intersection after the light has turned red. In most cases, a second photograph is taken to show the offending vehicle in the intersection. The camera records the date, time, and speed of the vehicle; a clear image of the vehicle is produced under a wide range of light and weather conditions. Images are carefully reviewed, and citations are mailed to the registered owners of the vehicles for which there is unambiguous evidence of a violation. Although many jurisdictions that use automated enforcement are in states that have laws authorizing its use, not all states where automated enforcement is in use have such laws, nor are they always necessary. Most automated enforcement programs and laws are for red light violations; however, the use of automated enforcement for speed is increasing, and a few jurisdictions use automated enforcement for other violations such as failing to pay a toll and disobeying a railroad crossing signal. In states that have automated enforcement laws, the laws vary from state to state; some authorize enforcement statewide, whereas others permit use only in specified communities. More information on red light running at http://www.iihs.org/research/topics/r... More information on speeding at http://www.iihs.org/research/topics/s...