Actuated green wave control for grid-like network traffic signal coordination

To deal with urban traffic congestion, this paper proposes an actuated green wave method. It extends an arterial actuated bandwidth method to network situations. The arterial bandwidth is based on several key temporal differences to determine phase patterns and offsets. The network is decomposed in such a way that it only consists of arterial bandwidth problems. It adds intersections from the start point in a breadth-first-search manner until the target road network is covered. To further make the bandwidth method dynamic, gap-out logic is also embedded in each cycle using vehicle counts detected by trap detectors. Given detected real-time parameters, the timing plan is updated periodically to adapt to traffic variations. An offset transitioning logic is also proposed to smooth timing plan updates. Finally, simulation tests are conducted against a self-organized actuated control method, on a 52-intersection road network using VISSIM. The results show that for more saturated situations the proposed method outperforms the actuated method in terms of average delay, stops, link speeds and vehicle arrivals.