关键词: 交通信号, 交通强度, 模糊控制, 平均延误

Abstract: In order to decrease the vehicle delay and increase the traffic capacity in intersections，a fuzzy control method for the traffic signal of four-phased intersections is put forward.Traffic intensity is applied to describing the urgency of traffic flow to go through each phase.Extension of the current green phase and the followed green phase are decided through fuzzy inference according to traffic intensity in each phase.Simulation is carried out in order to validate the performance of this traffic method with the average delay of vehicles in the intersection being the performance index.The result indicates that this method is more effective in decreasing the average delay in contrast to traffic-actuated control and fuzzy control that only takes into account the number of vehicles between two detectors.

Key words: traffic signals, traffic intensity, fuzzy control, average delay