A study of self-similarity in vehicular arrival pattern

10th Malaysian Road Conference & Exhibition 2018

工业技术（总论）

Khoo, Hooi Ling^1

Department of Civil Engineering, Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, Bandar Sungai Long Campus, Selangor, Kajang

43000, Malaysia^1

关键词: Delay calculation;    Empirical studies;    Hypothesis testing;    Recent researches;    Self-similar patterns;    Self-similarities;    Signalized intersection;    Traffic Engineering;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/512/1/012016/pdf
DOI  :  10.1088/1757-899X/512/1/012016

学科分类：工业工程学

来源: IOP

【 摘 要 】

Traditionally, the vehicle arrival pattern is modeled based on Poisson assumptions in the road traffic studies. However, recent research has shown that the vehicle arrival patterns exhibit characteristics of self-similarity. This finding will affect delay calculation, queue lengths and other variables that are used in traffic engineering which were based on Poisson assumptions. In this paper, empirical studies are carried out to investigate the existence of self-similarity characteristics in vehicle arrival pattern for traffic flow on highways and isolated signalized intersections. Traffic flow that is recorded from site is processed and analysed. A software is adopted to analyse the possible existence of self-similarity by computing the Hurst parameter from the data set. Hypothesis testing approach is then adopted to evaluate whether the findings are statistically significant. The results confirmed that the vehicle arrival pattern for arterial road exhibit self-similar pattern, and its corresponding headway is heavy-tailed. This finding is important especially in traffic signal design on arterial road.