Abstract
Reversing the direction of traffic flow in necessary road segments is an important strategy to optimize the flow, especially, in an emergency evacuation. The configuration may, however, block the paths toward the source. Sometimes, it may be necessary to save a path for some facility movements from a specific node towards the source. We consider such a problem as a biobjective optimization problem that minimizes the length of the saved path and the egress time of the given amount of flow. An algorithm based on the \(\epsilon\)-constraint method is proposed to find the non-dominated solutions and its computational performance has been tested on a road network of Kathmandu city and randomly generated networks.
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The datasets used and/or analysed during the current study are available from the corresponding author on reasonable request.
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Acknowledgements
The second author (Tanka Nath Dhamala) highly acknowledges the periodic research supports (including June 1 - August 31, 2023 at TU Bergakademie Freiberg) of the Alexander von Humboldt Foundation. We are also thankful to anonymous reviewers for their constructive suggestions to enhance the quality of this work.
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HNN, TND, and SD conceptualized the research problem. HNN carried out the formal analysis, write-up of the manuscript, programming, and data analysis under the supervision of TND and SD. All authors read and approved the final manuscript.
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Nath, H.N., Dhamala, T.N. & Dempe, S. Saving a path minimizing egress time of a dynamic contraflow: a bi-objective programming approach. OPSEARCH 61, 98–120 (2024). https://doi.org/10.1007/s12597-023-00690-9
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DOI: https://doi.org/10.1007/s12597-023-00690-9