Traffic signal is used to drive the traffic as according to the program chip but use of Microprocessor Based Road Traffic Signal Controller that is pretty effective to ensure traffic and pedestrians is going smoother. Microprocessor based Road Traffic Signal Controller is also called adaptive traffic control system (ATCS).
Click on the link below for more about road traffic signal controller. http://www.onnyx.in/microprocessor-based-road-traffic-signal-controller.html

Traffic signal controller

Source: http://onnyx.in/microprocessor-based-road-traffic-signal-controller.html

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