A road intersection traffic signal system control method

The present invention discloses a method for controlling a traffic signal system of road intersections, comprising the steps of: S1: establishing queue length model road intersections, road intersections queue length is calculated by the model road intersection queue length; S2: According to the formula ( 1) determining the position of a single inlet channel saturation point, according to the formula (2) determining the position of a single point of the overflow channel inlet; S3: in the step S2 according to the saturation point and the position of the overflow point, a state of a single traffic channel inlet determination, depending on the traffic state of the respective inlet channel road intersection, the traffic state of the road intersection determination; S4: determined according to the traffic state in step S3 the result of the intersection, the road traffic intersection signal control system. The present invention may be more accurately calculated queue length, determined traffic state road intersection, the traffic signal system to improve the control accuracy.