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中南大学学报(英文版)

Journal of Central South University

Vol. 21    No. 10    October 2014

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Incorporating nonuniform arrivals in delay variability modeling at signalized intersections
CHEN Peng(陈鹏)1, LIU Huan(刘欢)2, QI Hong-sheng(祁宏生)3, WANG Fu-jian(王福建)3

1. Department of Civil Engineering, Nagoya University, Nagoya 464-0811, Japan;
2. Graduate School of Environmental Studies, Nagoya University, Nagoya 464-0811, Japan;
3. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China

Abstract:The delay vehicles experience at signalized intersections is one of the most important indicators for measuring intersection performance. The interpretation of delay variability evolvement at intersections gives a comprehensive insight into arterial traffic operation. Thus, an analytical model is proposed to investigate delay variability at coordinated intersections. Two different flow rates are assumed for both effective red and green periods in cumulative curves, through which the effect of signal coordination is incorporated in delay estimation. Then, an analogy of Markov chain process is used to explore the mechanism of stochastic overflow queue at signalized intersections. Numerical case studies show that with the decrease of arrival proportions during green, the shape of delay distribution in both undersaturation and oversaturation cases shifts faster towards higher values, implying that the coordination effect between paired intersections has a great effect on the delay distribution. As for delay fluctuation range, favorable coordination is demonstrated to be able to weaken the variability of delay estimates especially for undersaturation conditions.

 

Key words: nonuniform arrival; signalized intersection; coordination effect; delay variability

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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