A two-way bandwidth maximization model for green-wave optimization control of transit priority

Arterial coordinated control has practical significance for transit priority control when intersection spacing is relatively short and similar. In this paper we purpose a two-way green-wave optimal signal priority control model for rail transit, the objective is to maximize passenger vehicles' bandwidth of green wave under the constraint of transits' bandwidth with the consideration of transits' and passenger vehicles' efficiency. If no optimal solution can be found, the model will automatically change the objective to maximize rail transits' bandwidth so that failure of model can be averted. Finally, we conducted 4 rounds of numerical simulation based on rail transit line 1 in Zhuhai, Guangdong province, China. The results indicate that the delay and travel speed of rail transit can averagely be improved by 27.01% and 12.28%. Future studies can focus on real-time green-wave control methods based on speed guidance and dynamic holding time of rail transit.