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The Journal of The Korea Institute of Intelligent Transport Systems Vol.2 No.1 pp.63-73
교통량 가중평균 방법을 적용한 COSMOS 속도 추정
Speed Estimation by Applying Volume Weighted Average Methods in COSMOS
Abstract
COSMOS(Cycle, Offset, Split Model for Seoul), a real-time traffic adaptive signal system. estimates queue lengths on each approach on the basis of arithmetic average spot speeds calculated on loop detectors installed at each of two adjacent lanes. In this paper, A new method, a traffic volume-weighted average method, was studied and compared with the existing arithmetic average method. It was found that the relationship between the ratio of volumes of two lanes and the difference of average speed of each lane has a linear form. With field data, The two methods were applied and the proposed method shows more stable and reasonable queue estimation results.
