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A study on traffic signal control at signalized intersections in VANETs  

Chang, Hyeong-Jun (고려대학교 메카트로닉스학과)
Park, Gwi-Tae (고려대학교 전기전자공학부)
Publication Information
The Journal of The Korea Institute of Intelligent Transport Systems / v.10, no.6, 2011 , pp. 108-117 More about this Journal
Abstract
Seoul metropolitan government has been operating traffic signal control system with the name of COSMOS since 2001. COSMOS uses the degrees of saturation and congestion which are calculated by installing loop detectors. At present, inductive loop detector is generally used for detecting vehicles but it is inconvenient and costly for maintenance since it is buried on the road. In addition, the estimated queue length might be influenced in case of error occurred in measuring speed, because it only uses the speed of vehicles passing by the detector. A traffic signal control algorithm which enables smooth traffic flow at intersection is proposed. The proposed algorithm assigns vehicles to the group of each lane and calculates traffic volume and congestion degree using traffic information of each group using VANETs(Vehicular Ad-hoc Networks) inter-vehicle communication. It does not demand additional devices installation such as cameras, sensors or image processing units. In this paper, the algorithm we suggest is verified for AJWT(Average Junction Waiting Time) and TQL(Total Queue Length) under single intersection model based on GLD(Green Light District) Simulator. And the result is better than Random control method and Best first control method. In case real-time control method with VANETs is generalized, this research that suggests the technology of traffic control in signalized intersections using wireless communication will be highly useful.
Keywords
VANETs; signalized intersections; real-time control; queue length; ITS;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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