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Estimation of Saturation Flow Rates at Signalized Intersections
Joint Authors
Shao, Chang-qiao
Liu, Xiao-ming
Source
Discrete Dynamics in Nature and Society
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-11-20
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
The saturation flow rate is a fundamental parameter to measure the intersection capacity and time the traffic signals.
However, it is revealed that traditional methods which are mainly developed using the average value of observed queue discharge headways to estimate the saturation headway might lead to underestimate saturation flow rate.
The goal of this paper is to study the stochastic nature of queue discharge headways and to develop a more accurate estimate method for saturation headway and saturation flow rate.
Based on the surveyed data, the characteristics of queue discharge headways and the estimation method of saturated flow rate are studied.
It is found that the average value of queue discharge headways is greater than the median value and that the skewness of the headways is positive.
Normal distribution tests were conducted before and after a log transformation of the headways.
The goodness-of-fit test showed that for some surveyed sites, the queue discharge headways can be fitted by the normal distribution and for other surveyed sites, the headways can be fitted by lognormal distribution.
According to the queue discharge headway characteristics, the median value of queue discharge headways is suggested to estimate the saturation headway and a new method of estimation saturation flow rates is developed.
American Psychological Association (APA)
Shao, Chang-qiao& Liu, Xiao-ming. 2012. Estimation of Saturation Flow Rates at Signalized Intersections. Discrete Dynamics in Nature and Society،Vol. 2012, no. 2012, pp.1-9.
https://search.emarefa.net/detail/BIM-493248
Modern Language Association (MLA)
Shao, Chang-qiao& Liu, Xiao-ming. Estimation of Saturation Flow Rates at Signalized Intersections. Discrete Dynamics in Nature and Society No. 2012 (2012), pp.1-9.
https://search.emarefa.net/detail/BIM-493248
American Medical Association (AMA)
Shao, Chang-qiao& Liu, Xiao-ming. Estimation of Saturation Flow Rates at Signalized Intersections. Discrete Dynamics in Nature and Society. 2012. Vol. 2012, no. 2012, pp.1-9.
https://search.emarefa.net/detail/BIM-493248
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-493248