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Traffic Photo Enforcement Systems

Taxonomy Code: TE-8440.8550

Programs that are responsible for installing and maintaining red light/speed camera systems that automatically photograph vehicles whose drivers run red lights or exceed posted speed limits. Red light cameras are connected to the traffic signal system and to sensors buried in the pavement at the crosswalk or stop line. The camera system continuously monitors the traffic signal, and the camera is triggered when any vehicle passes over the sensors faster than a preset minimum speed and at a specified elapsed time after the signal has turned red. A second photograph is taken that shows the violator in the intersection. The camera records the date, time of day, time elapsed since the beginning of the red signal, and the speed of the vehicle. The use of a flash produces clear images under a wide range of light and weather conditions. Speed limit enforcement cameras are installed at fixed locations along stretches of freeway/expressway where violations frequently occur and can be set to photograph drivers who are moving faster than a specified speed. Upon review of photographic evidence and depending on state law requirements, tickets are issued by mail to either vehicle owners or to drivers at the time of the offense.

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