Method for Assessing Effect of Input Parameters on Multiobjective Optimization of Signal Control
Publication: Journal of Transportation Engineering, Part A: Systems
Volume 146, Issue 2
Abstract
There is an increasing interest in signal-timing optimization methods that can consider mobility, safety, and emissions measures simultaneously. The introduction of new models increases the complexity of the required inputs and the relationships between inputs and outputs. This study developed and implemented such a method in an existing computational engine, presenting a sensitivity analysis conducted to provide insight on the effects and order of relevance of 20 key variables on the model’s outcomes and the associated trade-offs among mobility, safety, and emissions. This insight will help the designer, signal control engineer, and traffic analyst when designing intersection geometry and signal control. The statistical analysis of the results showed that the effect of each variable on the overall performance of the model is highly dependent on the combination of other variables. The traffic demand and the size of the intersection, defined by the number of lanes on the arterial, were found to be the most significant variables, affecting all performance measures. Mobility improvement performance usually coincides with emissions improvements, but sometimes occurs at the expense of safety.
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Acknowledgments
The study upon which this paper is based was funded by the USDOT UTC Program under the Southeastern Transportation Research Innovation Development and Education (STRIDE) Center, Project 2013-022S. The authors appreciate the support of all project team members at Florida International University and the University of Florida that contributed to various aspects of the overall project. The views and opinions in the paper are those of the authors only. The authors are fully responsible for any errors or omissions.
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Published In
Journal of Transportation Engineering, Part A: Systems
Volume 146 • Issue 2 • February 2020
Copyright
©2019 American Society of Civil Engineers.
History
Received: Sep 28, 2018
Accepted: May 1, 2019
Published online: Nov 25, 2019
Published in print: Feb 1, 2020
Discussion open until: Apr 25, 2020
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