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Journal of Advanced Transportation
Volume 2019, Article ID 7481489, 14 pages
https://doi.org/10.1155/2019/7481489
Research Article

Distributed Cooperative Backpressure-Based Traffic Light Control Method

1School of Control Science and Engineering, Shandong University, Jinan 250061, China
2School of Information and Engineering, Shandong Yingcai University, Jinan 250104, China

Correspondence should be addressed to Licai Yang; nc.ude.uds@clgnay

Received 6 November 2018; Accepted 18 February 2019; Published 5 March 2019

Academic Editor: Eneko Osaba

Copyright © 2019 Shenxue Hao et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

On the foundation of the original backpressure-based traffic light control algorithm, a distributed cooperative backpressure-based traffic light control method is proposed in this paper. The urban traffic network is modeled as a smart agent-controlled queuing network, in which the intersection agents exchange the queue length information and the selected activating light phase information of neighboring intersections through communications and determine the activating light phase at each time slot according to local traffic information. The improved phase pressure computation method considers the phase state of downstream intersections instead of only the queue length of the local intersections. Light phase switching coordination among adjacent intersections is achieved using the consensus-based bundle algorithm, in which the cooperative light phase switching problem is viewed as a task assignment issue among adjacent intersections. Simulation results illustrated that the proposed cooperative backpressure-based traffic light control method obtained better performance than the original backpressure-based and fixed-time traffic control methods.