Exploring Optimal Signal Plans for Isolated Signalized Intersections with Central Pedestrian Refuges
Publication: Journal of Transportation Engineering, Part A: Systems
Volume 150, Issue 5
Abstract
This paper addresses the global optimal signal plan of a fixed time control for an isolated signalized intersection with central pedestrian refuges considering both vehicle delays and pedestrian delays. A signal phase plan, a pedestrian signal setting scheme, and a signal timing plan are all part of the signal plan presented here. Pedestrian delays are explicitly formulated with signal timing parameters considering signal phase plans and pedestrian signal setting schemes. Integer nonlinear combinatorial programming models are proposed to minimize average and total delays. Numerical experiments show that the proposed optimization models outperform the existing ones, especially when traffic demands between phases are unbalanced. The analysis of the results shows that separate pedestrian signalization settings, and adjacent (or nonadjacent) allowed crossing phases for pedestrians at central islands are superior signal plan options when the minimum phase time is insufficient (or sufficient) to accommodate the minimum green time for crosswalks.
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Data Availability Statement
Some or all data, models, or codes that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
This study was sponsored by the National Natural Science Foundation of China (52072070, 52202410) and the Tongling Science and Technology Major Project (202201JB006).
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Information & Authors
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Published In
Journal of Transportation Engineering, Part A: Systems
Volume 150 • Issue 5 • May 2024
Copyright
© 2024 American Society of Civil Engineers.
History
Received: Apr 20, 2023
Accepted: Nov 7, 2023
Published online: Mar 8, 2024
Published in print: May 1, 2024
Discussion open until: Aug 8, 2024
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