Traffic guidance–perimeter control coupled method for the congestion in a macro network

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Traffic guidance–perimeter control coupled method for the congestion in a macro network

Ding, Heng / Guo, Fang / Zheng, Xiaoyan / Zhang, Weihua

Highlights•Propose a coupled method for the congestion in a macro network with multiple sub-regions.•The proposed method is constructed using the traffic guidance and perimeter control.•Show that the TGPCC can better alleviate congestion than PC or NPCGC.•Show that the TGPCC can decrease the travel delay of road network.

AbstractMacroscopic fundamental diagram (MFD) describes the macro relationship between a network vehicle density and a network space mean flow, without requiring the mastery of complex origin to destination data. Thus, MFD provides an opportunity for the macro control of urban road network. However, most of the existing MFD control methods ignore the active role of traffic guidance in solving congestion problems. This study presents a traffic guidance–perimeter control coupled (TGPCC) method to improve the performance of macroscopic traffic networks. The method considers the optimal cumulative volume of a network as the goal and establishes a programming function according to the network equilibrium rule of traffic flow amongst multiple MFD sub-regions, which regards the minimum delay of network, as the objective. The Logit model for the compliance rate of driver route guidance is established by the stated preference survey. Moreover, the perimeter control (PC) method is proposed for adjusting the phase split of intersections. Finally, three schemes, namely, the TGPCC, PC and the method without PC and guidance are tested on a network with four well-defined MFD sub-regions. Results show that the TGPCC addresses the issue of congestion and decreases the total delay accordingly.