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A Feeder-Bus Dispatch Planning Model for Emergency Evacuation in Urban Rail Transit Corridors
The mobility of modern metropolises strongly relies on urban rail transit (URT) systems, and such a heavy dependence causes that even minor service interruptions would make the URT systems unsustainable. This study aims at optimally dispatching the ground feeder-bus to coordinate with the urban rail...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5038952/ https://www.ncbi.nlm.nih.gov/pubmed/27676179 http://dx.doi.org/10.1371/journal.pone.0161644 |
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author | Wang, Yun Yan, Xuedong Zhou, Yu Zhang, Wenyi |
author_facet | Wang, Yun Yan, Xuedong Zhou, Yu Zhang, Wenyi |
author_sort | Wang, Yun |
collection | PubMed |
description | The mobility of modern metropolises strongly relies on urban rail transit (URT) systems, and such a heavy dependence causes that even minor service interruptions would make the URT systems unsustainable. This study aims at optimally dispatching the ground feeder-bus to coordinate with the urban rails’ operation for eliminating the effect of unexpected service interruptions in URT corridors. A feeder-bus dispatch planning model was proposed for the collaborative optimization of URT and feeder-bus cooperation under emergency situations and minimizing the total evacuation cost of the feeder-buses. To solve the model, a concept of dummy feeder-bus system is proposed to transform the non-linear model into traditional linear programming (ILP) model, i.e., traditional transportation problem. The case study of Line #2 of Nanjing URT in China was adopted to illustrate the model application and sensitivity analyses of the key variables. The modeling results show that as the evacuation time window increases, the total evacuation cost as well as the number of dispatched feeder-buses decrease, and the dispatched feeder-buses need operate for more times along the feeder-bus line. The number of dispatched feeder-buses does not show an obvious change with the increase of parking spot capacity and time window, indicating that simply increasing the parking spot capacity would cause huge waste for the emergent bus utilization. When the unbalanced evacuation demand exists between stations, the more feeder-buses are needed. The method of this study will contribute to improving transportation emergency management and resource allocation for URT systems. |
format | Online Article Text |
id | pubmed-5038952 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-50389522016-10-27 A Feeder-Bus Dispatch Planning Model for Emergency Evacuation in Urban Rail Transit Corridors Wang, Yun Yan, Xuedong Zhou, Yu Zhang, Wenyi PLoS One Research Article The mobility of modern metropolises strongly relies on urban rail transit (URT) systems, and such a heavy dependence causes that even minor service interruptions would make the URT systems unsustainable. This study aims at optimally dispatching the ground feeder-bus to coordinate with the urban rails’ operation for eliminating the effect of unexpected service interruptions in URT corridors. A feeder-bus dispatch planning model was proposed for the collaborative optimization of URT and feeder-bus cooperation under emergency situations and minimizing the total evacuation cost of the feeder-buses. To solve the model, a concept of dummy feeder-bus system is proposed to transform the non-linear model into traditional linear programming (ILP) model, i.e., traditional transportation problem. The case study of Line #2 of Nanjing URT in China was adopted to illustrate the model application and sensitivity analyses of the key variables. The modeling results show that as the evacuation time window increases, the total evacuation cost as well as the number of dispatched feeder-buses decrease, and the dispatched feeder-buses need operate for more times along the feeder-bus line. The number of dispatched feeder-buses does not show an obvious change with the increase of parking spot capacity and time window, indicating that simply increasing the parking spot capacity would cause huge waste for the emergent bus utilization. When the unbalanced evacuation demand exists between stations, the more feeder-buses are needed. The method of this study will contribute to improving transportation emergency management and resource allocation for URT systems. Public Library of Science 2016-09-27 /pmc/articles/PMC5038952/ /pubmed/27676179 http://dx.doi.org/10.1371/journal.pone.0161644 Text en © 2016 Wang et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
spellingShingle | Research Article Wang, Yun Yan, Xuedong Zhou, Yu Zhang, Wenyi A Feeder-Bus Dispatch Planning Model for Emergency Evacuation in Urban Rail Transit Corridors |
title | A Feeder-Bus Dispatch Planning Model for Emergency Evacuation in Urban Rail Transit Corridors |
title_full | A Feeder-Bus Dispatch Planning Model for Emergency Evacuation in Urban Rail Transit Corridors |
title_fullStr | A Feeder-Bus Dispatch Planning Model for Emergency Evacuation in Urban Rail Transit Corridors |
title_full_unstemmed | A Feeder-Bus Dispatch Planning Model for Emergency Evacuation in Urban Rail Transit Corridors |
title_short | A Feeder-Bus Dispatch Planning Model for Emergency Evacuation in Urban Rail Transit Corridors |
title_sort | feeder-bus dispatch planning model for emergency evacuation in urban rail transit corridors |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5038952/ https://www.ncbi.nlm.nih.gov/pubmed/27676179 http://dx.doi.org/10.1371/journal.pone.0161644 |
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