The traditional coordinated signal control method has the problems of narrow bandwidth and low utilization of green time. With the help of bidirectional communication function of cooperative vehicle infrastructure system, a speed guidance strategy at the intersections for arterial coordinated signal control is proposed. Based on this, the arrival time interval of vehicles to be processed at each intersection of each cycle is defined. Considering the change of stops before and after the application of proposed method, the delay and stops are weighted to form a comprehensive performance index (PI), then the PI model is established and the solution algorithm is given. An optimized model of traffic signal timing parameters is constructed based on minimizing average PI per vehicle. The sensitivity of optimization model is analyzed from the aspects of the adjustment amplitude of left-turn phase green time, speed guidance range, average travel speed and intersection spacing, and the applicable conditions of the model are determined. The simulation results showed that the average PI proposed in this paper was reduced by 5.5% compared with the coordinated signal control scheme with only implementing the speed guidance, the effectiveness of the optimized model was validated.

CICTP