Two-Way Bandwidth Maximization Model with Proration Impact Factor for Unbalanced Bandwidth Demands
Publication: Journal of Transportation Engineering
Volume 138, Issue 5
Abstract
Progression bandwidth maximization is one of the most important signal coordination strategies for urban arterial signal control. MAXBAND and MULTIBAND have implemented a weighting factor that is capable of adjusting the bandwidth according to unbalanced bandwidth demands in a two-way bandwidth maximization problem. The maximum bandwidth solution may not be achieved with certain values of weighting factors; therefore, users may need to have a well-developed idea about what weighting factor to use in order to not compromise the total bandwidth. In this paper, we propose a new two-way bandwidth maximization model that not only maximizes the total bandwidth, but also introduces a bandwidth proration impact factor. This impact factor allows the user to control the importance of satisfying the target bandwidth demand ratio. Numerical examples have demonstrated that the new model has the following advantages: (1) when two-way progression solution is not physically possible, the model first guarantees maximum total bandwidths and then automatically prorates the bandwidth fully to the direction with higher traffic demand; (2) when two-way progressions can be achieved, the model not only guarantees maximum total bandwidth but also automatically prorates the bandwidth in a ratio as close as possible to the ratio of bandwidth demands.
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Acknowledgments
This research was supported by the Fundamental Research Funds for the Central Universities (2011ZM0117) and the National Natural Science Foundation of China (50878088).
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Information & Authors
Information
Published In
Journal of Transportation Engineering
Volume 138 • Issue 5 • May 2012
Pages: 527 - 534
Copyright
© 2012. American Society of Civil Engineers.
History
Received: Feb 8, 2011
Accepted: Sep 12, 2011
Published online: Sep 14, 2011
Published in print: May 1, 2012
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