Method of Bidirectional Green Wave Coordinated Control for Arterials Under Asymmetric Release Mode

The existing coordinated control methods of green wave are more complicated and less operable, which are mainly applicable to intersection groups with symmetrical entrance release mode. Based on engineering practice, a new method of bidirectional progression green wave coordination control is presented by designing particular overlapping phases on the basis of NEMA dual-ring phasing configuration. According to the characteristics of asymmetric release mode and the requirements of green wave coordinated control, the overall optimization designs of phase sequence combination and offset were carried out, and the influences of cruising speed and residual queues at red light on offset were considered, and then the classical bidirectional green wave graphic method was optimized. Based on the investigation data of the intersections group of Ziwu Road in Qujing city, bidirectional green wave designs were conducted under both symmetric and asymmetric release mode. The results show that the latter approach not only improves the bandwidth of bidirectional green wave band effectively, but also reduces the average delay and the average number of stops on the main road.