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A Comparison Study of Different Offset Transition Lengths in Simulation Environment  

Kim, Jin-Tae (서울지방경찰청 교통개선기획실)
Chang, Myung-Soon (한양대학교 교통시스템공학부)
Park, Jae-Wan (한국도로공사 기획조정실 조사팀)
Publication Information
Journal of Korean Society of Transportation / v.23, no.7, 2005 , pp. 43-52 More about this Journal
Abstract
Signal timing transition has recently been highlighted with Adaptive Traffic Control Systems (ATCS) providing advanced traffic signal operation including real-time grouping of coordinated intersections. Signal timing transition occurs when such signal timings as cycles and offsets are changed at coordinated intersections. Setting a proper length of signal timing transition has become in interest for real-time coordination. This paper presents a study verifying the effects of different lengths of signal timing transition. Four different transition lengths were tested and compared in simulation environment. They include a single, double, treble, quadruple cycle length transitions. The number of cycles represents the ones used (interpolation) for transition. Signal timings were controlled to be adjusted uniformly and discretely during a transition period. Transition times considered in the test are within ranges of ${\pm}20$ percents of cycle lengths. It was found from the study that a single cycle transition performs better than or at least equal to the ones from the other with fifteen different operational conditions, which are developed based on a hypothetical arterial. It was suggested that a single cycle length transition be beneficial when amount of transition is within ${\pm}20$ percents of cycle lengths.
Keywords
옵셋;전이;주기;연동;모의실험;
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