Abstract
Traffic lights play an important role at every intersection in minimizing congestion, especially at intersections three and four. Today, the most common setting for traffic lights involves setting a fixed time. This pattern applies throughout the day, although the density of vehicles at each crossing is different. As a result, traffic jams on one side of the intersection are often unavoidable. Based on these problems, in this study an adaptive traffic light control system based on Programmable Logic Controller was built. In this test, the amber and green lights are set to about 3 and 5 seconds, respectively. During crowded situations, the duration of the green light is reduced to 10 seconds. It has been determined through testing that when the traffic light sensor detects a traffic jam, the green light will be on for 10 seconds, while under normal conditions it will be on for 5 seconds.
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