Abstract：In order to improve the trunk road traffic capacity, according to the characteristic of the correlation of adjacent intersections, three correlative intersections in a mainline are selected as the research object. When the cycle length and phase difference are determined, a fuzzy coordinated control algorithm using the average queue length as optimization target is proposed. Meanwhile, a method coordinating the traffic flow of three main adjacent intersections is designed based on the concrete intersection model, which can realize the correlation of multi-intersection traffic flow. Finally, The simulation for the specific traffic flow situation on one trunk of Jiaozuo city is carried out, and the result shows that the timing plan of the algorithm can coordinate urban arterial traffic signal better and can make the average queue length for waiting decreased 4. 74 vehicles, comparing with existing induction control algorithm.

Keyword：three intersections;correlation of traffic flow;cycle length and phase difference determine;fuzzy coordination control;