Fuzzy Logic Signal Controller Based on Competition for Isolated Intersection

Fuzzy traffic controller based competition for a single intersection is proposed. The phase sequencer operates in conjunction to the fuzzy logic controller for traffic system. Phase sequencer decides the next phase among the possible ones. The fuzzy decision controller is responsible for controlling the length of the green time according to current phase and next phase waiting queue. A simulation experiment was developed to simulate the operation of an isolated intersection. The average delay time of a vehicle is used as a performance index. Simulation result shows that the proposed method can effectively decrease the average delaying time and is superior to the conventional fixed-phase method. The strategy can deal with more stochastic and more uncertain traffic flow.