Road intersection traffic signal system control method

The invention discloses a road intersection traffic signal system control method. The method comprises the following steps that 1, a road intersection queuing length model is built, and the road intersection queuing length is calculated through the road intersection queuing length model; 2, the position of a single-entrance-lane saturation point is determined according to the formula (1), and the position of a single-entrance-lane spill point is determined according to the formula (2); 3, the traffic state of single entrance lanes is determined according to the position of the saturation point and the position of the spill point in the second step, and the traffic state of a road intersection is determined according to the traffic state of each entrance lane of the road intersection; 4, a traffic signal system of the road intersection is controlled according to the determination result of the traffic state of the road intersection in the third step. According to the road intersection traffic signal system con