Simulation-based passenger evacuation optimization in metro stations considering multi-objectives

Evacuation is critical for safety management due to the highly overcrowded passengers in the metro stations. A simulation-based approach integrating Random Forest (RF) and Non-dominated Sorting Genetic Algorithm III (NSGA-III) is proposed to perform the evacuation evaluation and optimization at metr...

Full description

Saved in:
Bibliographic Details
Main Authors: Guo, Kai, Zhang, Limao
Other Authors: School of Civil and Environmental Engineering
Format: Article
Language:English
Published: 2022
Subjects:
Online Access:https://hdl.handle.net/10356/160750
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Nanyang Technological University
Language: English
id sg-ntu-dr.10356-160750
record_format dspace
spelling sg-ntu-dr.10356-1607502022-08-02T04:29:38Z Simulation-based passenger evacuation optimization in metro stations considering multi-objectives Guo, Kai Zhang, Limao School of Civil and Environmental Engineering Engineering::Civil engineering Emergency Evacuation Metro Stations Evacuation is critical for safety management due to the highly overcrowded passengers in the metro stations. A simulation-based approach integrating Random Forest (RF) and Non-dominated Sorting Genetic Algorithm III (NSGA-III) is proposed to perform the evacuation evaluation and optimization at metro stations. A 3D model of the metro station is built to simulate the dynamic process of passenger evacuation in metro stations. A framework consisting of 9 influential factors and 3 objectives is developed to model the input-output relationship in passenger evacuation. An RF-based meta-model is used to construct the relationship between influential factors and objectives. At last, NSGA-III is applied to seeking the optimal solutions for the station renovation in order to achieve a safe evacuation. A station model simulating a real metro station in Singapore is constructed to test the effectiveness and applicability of the proposed approach. It is found that (1) A safe evacuation could be achieved for the station, but along with the increasing passenger volume and panic level, the requirement of evacuation objectives, the evacuation time and density, may not be met. Especially under the high passenger volume conditions, the passenger density could reach up to 6.2 unit/m2 (extremely dangerous); (2) An average improvement degree, 7.5%, can be achieved for the optimization of 20 test cases, and a maximum improvement degree, 22.5%, can be achieved for the evacuation optimization at metro stations; (3) It could be difficult to keep both of the evacuation time and density within the standards if one major exit is closed, even after the optimization. But a larger average improvement degree, 10.8%, can be achieved by the proposed optimization approach, which indicates the optimal solutions still could reduce the risk to a great extent. The novelty of this research lies in that (a) An RF algorithm is incorporated to build the meta-model that can properly represent the relationship between influential factors and objectives, despite the complexity and even conflicting between them; (b) Optimal measures for the evacuation improvement are provided from the MOO perspective by integrating NSGA-III. This hybrid approach can be used as a decision tool to assist regulatory authorities in developing effective emergency evacuation evaluation and optimization plans with adequate consideration of the complexity and multi-objective nature under evacuation events. Ministry of Education (MOE) Nanyang Technological University The authors declare no conflict of interest. The Ministry of Education Tier 1 Grant, Singapore (No. 04MNP002126C120, No. 04MNP000279C120) and the Start-Up Grant at Nanyang Technological University, Singapore (No. 04INS000423C120) are acknowledged for their financial support of this research. The 1st author is grateful to Nanyang Technological University, Singapore for his Ph.D. research scholarship. 2022-08-02T04:29:37Z 2022-08-02T04:29:37Z 2022 Journal Article Guo, K. & Zhang, L. (2022). Simulation-based passenger evacuation optimization in metro stations considering multi-objectives. Automation in Construction, 133, 104010-. https://dx.doi.org/10.1016/j.autcon.2021.104010 0926-5805 https://hdl.handle.net/10356/160750 10.1016/j.autcon.2021.104010 2-s2.0-85118480722 133 104010 en 04MNP002126C120 04MNP000279C120 04INS000423C120 Automation in Construction © 2021 Elsevier B.V. All rights reserved.
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Civil engineering
Emergency Evacuation
Metro Stations
spellingShingle Engineering::Civil engineering
Emergency Evacuation
Metro Stations
Guo, Kai
Zhang, Limao
Simulation-based passenger evacuation optimization in metro stations considering multi-objectives
description Evacuation is critical for safety management due to the highly overcrowded passengers in the metro stations. A simulation-based approach integrating Random Forest (RF) and Non-dominated Sorting Genetic Algorithm III (NSGA-III) is proposed to perform the evacuation evaluation and optimization at metro stations. A 3D model of the metro station is built to simulate the dynamic process of passenger evacuation in metro stations. A framework consisting of 9 influential factors and 3 objectives is developed to model the input-output relationship in passenger evacuation. An RF-based meta-model is used to construct the relationship between influential factors and objectives. At last, NSGA-III is applied to seeking the optimal solutions for the station renovation in order to achieve a safe evacuation. A station model simulating a real metro station in Singapore is constructed to test the effectiveness and applicability of the proposed approach. It is found that (1) A safe evacuation could be achieved for the station, but along with the increasing passenger volume and panic level, the requirement of evacuation objectives, the evacuation time and density, may not be met. Especially under the high passenger volume conditions, the passenger density could reach up to 6.2 unit/m2 (extremely dangerous); (2) An average improvement degree, 7.5%, can be achieved for the optimization of 20 test cases, and a maximum improvement degree, 22.5%, can be achieved for the evacuation optimization at metro stations; (3) It could be difficult to keep both of the evacuation time and density within the standards if one major exit is closed, even after the optimization. But a larger average improvement degree, 10.8%, can be achieved by the proposed optimization approach, which indicates the optimal solutions still could reduce the risk to a great extent. The novelty of this research lies in that (a) An RF algorithm is incorporated to build the meta-model that can properly represent the relationship between influential factors and objectives, despite the complexity and even conflicting between them; (b) Optimal measures for the evacuation improvement are provided from the MOO perspective by integrating NSGA-III. This hybrid approach can be used as a decision tool to assist regulatory authorities in developing effective emergency evacuation evaluation and optimization plans with adequate consideration of the complexity and multi-objective nature under evacuation events.
author2 School of Civil and Environmental Engineering
author_facet School of Civil and Environmental Engineering
Guo, Kai
Zhang, Limao
format Article
author Guo, Kai
Zhang, Limao
author_sort Guo, Kai
title Simulation-based passenger evacuation optimization in metro stations considering multi-objectives
title_short Simulation-based passenger evacuation optimization in metro stations considering multi-objectives
title_full Simulation-based passenger evacuation optimization in metro stations considering multi-objectives
title_fullStr Simulation-based passenger evacuation optimization in metro stations considering multi-objectives
title_full_unstemmed Simulation-based passenger evacuation optimization in metro stations considering multi-objectives
title_sort simulation-based passenger evacuation optimization in metro stations considering multi-objectives
publishDate 2022
url https://hdl.handle.net/10356/160750
_version_ 1743119604531593216