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Along with the development of human society and the improvement of living standards, the number of cars in the unceasing increase, traffic problem increasingly prominent, depend solely on human to directing traffic is not feasible, therefore, the lights to finish the design demand it increasingly urgent, in order to ensure the vehicles and pedestrains intersections, smooth, often through using electronic control traffic signals to command, below is used in digital design of traffic and management problems, based on the status of the actual situation of urban traffic control system is expounded traffic lights: red light, "says one way and yellow lights will turn red, said that allows traffic lights. Use EDA (electronic design automation technology has become the trend of The Times of electronic circuit analysis of modern urban traffic control principle, this paper presents a simple use of urban traffic control system hardware design. This paper introduces a method based on elect