Multi-path Network Green-band Coordination Control Method Considering Variable Phase Structure

To compensate for the insufficiency of network multi-path green-band coordination control methods in signal control, a network green-band coordination control method is proposed, which creates independent green-bands for multiple paths with different origins and destinations in a network. A mixed-integer nonlinear programming model is established for the network, considering the variable phase structure and green-band breakpoints; the green-band constraints arc constructed, which can realize any customized phase structure; the switching of the signal scheme is realized among normal, double, and uneven double cycles; the scenarios, wherein green bands travel through different phases, are defined according to double cycle and uneven double cycle plans of equal phase lengths. The proposed network green-band coordination control method was used to coordinate and optimize the traffic signal in the regional road network of Rizhao City, Shandong Province. Simulation experiments were performed to evaluate the performance of the proposed model, the status quo, Yang Model and Pband with the help of average travel time, average number of stops and performance index; the results show that the model successfully created independent green-bands for the seven paths in the above case; the green-band bandwidths of the seven paths reached 35, 35, 35, 35, 31, 31, and 28 s, respectively; the proposed model is superior to the status quo and Yang Model in all paths and in the whole network, and when compared to Pband, it demonstrated comparable performance in four paths, while outperforming Pband in the remaining three paths and in the whole network; a comparison between the double cycle plan and the normal plan at an isolated intersection shows that the double cycle plan can effectively reduce the delay at all arms of the intersection. © 2023 Xi'an Highway University. All rights reserved.