Signal Coordination Algorithm Considering Vehicle Platoon Movement Characteristics on Arterial Streets

To develop a signal coordination algorithm and determine its application conditions, a new prediction model of vehicle arrival pattern of intersection coordinated phase was brought forward, which is based on Robertson's dispersion model and take into account three contributing factors such as platoon dispersion, turning vehicles and downstream queue length. According to the relationship between platoon arrival time and the green starting and ending time of coordinated phase, the calculation method for total vehicle delay of coordinated phase was established. Then, an optimization algorithm of signal coordination plan was developed by taking total vehicle delays of coordinated phases of intersections in the traffic control subarea as optimization objective, and offsets as optimization variables. Simulation results shows that compared with the improved numeric method, the proposed algorithm can reduce the vehicle delay of coordinated phases by 7.4%. With the increase of link length, turning vehicles and downstream queue length, the coordinated control benefit decreases gradually.