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Calibration of transyt platoon dispersion algorithm for conditions along major arterials in the cities of Dammam and al-Khobar, Saudi Arabia
Source
The Arabian Journal for Science and Engineering
Issue
Vol. 21, Issue 4A (31 Aug. 1996), pp.479-488, 10 p.
Publisher
King Fahd University of Petroleum and Minerals
Publication Date
1996-08-31
Country of Publication
Saudi Arabia
No. of Pages
10
Main Subjects
Abstract EN
The reliability and effectiveness of the TRANSYT model depend primarily on the ability of its platoon dispersion algorithm to accurately predict the flow pattern from one signal to another.
The algorithm is based on the theory that a platoon of vehicles starting from an upstream intersection will continuously disperse as it travels downstream along the link.
The amount of dispersion in the traffic flow pattern, as predicted by this algorithm, depends on the proper value of an empirical constant in the algorithm referred to as the “Platoon Dispersion Factor” (PDF).
The objective of this study was to determine the value of ?DF which best simulates the traffic conditions in the study area.
The study was conducted along two major arterials in areas of mixed residential and commercial activities.
F.ach arterial consisted of four signalized intersections with four approaches to each of them.
The signals at these intersections were pre-timed with four protected phases.
It was concluded that the average best fit (calibrated) FDF values in the study area were 28 and 40 for low and moderate friction links, respectively.
the other hand, the TRANSYT-?F manual suggests a value of 25 for low friction links and 35 for moderate friction links.
Nevertheless, the change in performance measures resulting from using the calibrated PDF value over the suggested ones was small and seems to be within the accuracy of the TRANSYT-7F model.
American Psychological Association (APA)
al-Ratrut, Nidal T.. 1996. Calibration of transyt platoon dispersion algorithm for conditions along major arterials in the cities of Dammam and al-Khobar, Saudi Arabia. The Arabian Journal for Science and Engineering،Vol. 21, no. 4A, pp.479-488.
https://search.emarefa.net/detail/BIM-390225
Modern Language Association (MLA)
al-Ratrut, Nidal T.. Calibration of transyt platoon dispersion algorithm for conditions along major arterials in the cities of Dammam and al-Khobar, Saudi Arabia. The Arabian Journal for Science and Engineering Vol. 21, no. 4A (Aug. 1996), pp.479-488.
https://search.emarefa.net/detail/BIM-390225
American Medical Association (AMA)
al-Ratrut, Nidal T.. Calibration of transyt platoon dispersion algorithm for conditions along major arterials in the cities of Dammam and al-Khobar, Saudi Arabia. The Arabian Journal for Science and Engineering. 1996. Vol. 21, no. 4A, pp.479-488.
https://search.emarefa.net/detail/BIM-390225
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 488
Record ID
BIM-390225