City intersection traffic signal control is an important method to improve the efficiency of road network and alleviate traffic\ncongestion. This paper researches traffic signal fuzzy control method on a single intersection. A two-stage traffic signal control\nmethod based on traffic urgency degree is proposed according to two-stage fuzzy inference on single intersection. At the first stage,\ncalculate traffic urgency degree for all red phases using traffic urgency evaluation module and select the red light phase with large\ntraffic urgency as the next phase to switch. At the second stage, green delay of the current green phase is determined by fuzzy\ninference based on the amount of vehicles of current green phase and next green phase. The average vehicle delays are used to\nevaluate the performance of the fuzzy signal controller. Finally, comparisons have been made with pretimed controller and fuzzy\nlogic controller without considering the urgency of red phase. Simulation results show the performance of our proposed method.
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