Resilience Analysis of Metro Networks: A Case Study of Shanghai Metro Network

Geo-Risk 2017 ◽  
2017 ◽  
Author(s):  
Fei Du ◽  
Hongwei Huang ◽  
Dongming Zhang ◽  
Fan Zhang
Keyword(s):  
Metro Networks ◽  
Shanghai Metro ◽  
Metro Network

scholarly journals Cascading Failure Analysis on Shanghai Metro Networks: An Improved Coupled Map Lattices Model Based on Graph Attention Networks

2021 ◽  
Vol 19 (1) ◽  
pp. 204
Author(s):  
Haonan Ye ◽  
Xiao Luo
Keyword(s):  
Failure Analysis ◽  
Emergency Management ◽  
Cascading Failure ◽  
Coupled Map Lattices ◽  
Dynamic Behaviors ◽  
Attention Networks ◽  
Model Based ◽  
Metro Networks ◽  
Shanghai Metro ◽  
Metro Network

Analysis of the robustness and vulnerability of metro networks has great implications for public transport planning and emergency management, particularly considering passengers’ dynamic behaviors. This paper presents an improved coupled map lattices (CMLs) model based on graph attention networks (GAT) to study the cascading failure process of metro networks. The proposed model is applied to the Shanghai metro network using the automated fare collection (AFC) data, and the passengers’ dynamic behaviors are simulated by GAT. The quantitative cascading failure analysis shows that Shanghai metro network is robust to random attacks, but fragile to intentional attacks. Moreover, there is an approximately normal distribution between instant cascading failure speed and time step and the perturbation in a station which leads to steady state is approximately a constant. The result shows that a station surrounded by other densely distributed stations can trigger cascading failure faster and the cascading failure triggered by low-level accidents will spread in a short time and disappear quickly. This study provides an effective reference for dynamic safety evaluation and emergency management in metro networks.

scholarly journals Study of the Structural and Robustness Characteristics of Madrid Metro Network

2019 ◽  
Vol 11 (12) ◽  
pp. 3486 ◽  
Author(s):  
Elisa Frutos Bernal ◽  
Angel Martín del Rey
Keyword(s):  
Network Analysis ◽  
Qualitative Analysis ◽  
Smart Cities ◽  
Transport Networks ◽  
Ideal Candidate ◽  
Transportation Service ◽  
Topological Characteristics ◽  
Metro Networks ◽  
The Ideal ◽  
Metro Network

A transportation service must be sustainable, respectful of the environment, and socially and economically responsible. These requirements make metro networks the ideal candidate as the most efficient mean of transport in our society. Now, a correct management of this type of infrastructures entails the analysis of the structure and robustness of these networks. This allows us to detect malfunctions and, above all, to design in the most appropriate way the expansion of subway networks. This is one of the major challenges facing the study of transport networks in sustainable smart cities. In this sense, the complex network analysis provides us with the necessary scientific tools to perform both quantitative and qualitative analysis of metro networks. This work deals with Madrid metro network, which is the largest in Spain. The main structural and topological characteristics, and robustness features of Madrid metro network were studied. The results obtained were analyzed and some conclusions were derived.

Shanghai Metro Flow: Multiple Perspectives into a Subway System

Leonardo ◽  
2017 ◽  
Vol 50 (5) ◽  
pp. 511-512
Author(s):  
Till Nagel ◽  
Benedikt Groß
Keyword(s):  
Urban Mobility ◽  
Multiple Perspectives ◽  
Aesthetic Form ◽  
Subway System ◽  
Shanghai Metro ◽  
The City ◽  
Metro Network

One of the main characteristics of cities is the large amount of people moving around. These flows are reflected in all the subways dashing through the city. With the authors’ work, they strive to give an impression of this pulse of the city. They present Shanghai Metro Flow, consisting of an animated visualization composed of three scenes, each giving another perspective into the metro network, and an accompanying poster showing subway line details. Each visualization combines established techniques with a highly aesthetic form in order to attract people to observe and dwell on different aspects of urban mobility.

Vulnerability Analysis of Link-Weighted Shanghai Metrorail Transit Network

2018 ◽  
Author(s):  
Yanjie Zhang ◽  
Yalda Saadat ◽  
Dongming Zhang ◽  
Bilal M. Ayyub ◽  
Hongwei Huang
Keyword(s):  
Network Topology ◽  
Structural Features ◽  
Network Size ◽  
Global Network ◽  
Interval Length ◽  
Network Efficiency ◽  
Multiple Characteristic ◽  
Shanghai Metro ◽  
Metro System ◽  
Metro Network

With the degradation of metrorail facilities and the increase in network size, it is urgently needed to perform vulnerability assessment to ensure the safe operation of the metro system. In this paper, a link-weighted network model is proposed by considering the physical interval length between neighboring metro stations as link weight factor. Firstly, the metro network was essentially mapped into a bipartite topological diagram that consists of nodes denoting metro stations and links representing metro routes including any tunnels or bridges. After analyzing the network for its complexity level, it was revealed that the metro network topology can be appropriately constructed by using the Space L method. On this basis, multiple characteristic indexes of the network were calculated to characterize network topology structural features. We then tested the state of Shanghai metro network under different failure scenarios by removing a fraction of nodes from the network. Quantitative vulnerability analyses were conducted according to the change in the topological structure of Shanghai metro network and the change in the corresponding global network efficiency due to disruptions. Finally, both the network efficiency of link-weighted and unweighted Shanghai metro network topology were calculated and compared. This study has identified the vulnerable metro stations, which could provide support for the reasonable resource allocation of maintenance work and the decision-making in emergency treatment after failure. In order to increase the adaptability to emergencies and improve the operational efficiency, it was proposed that during the planning, construction, and operation of the metro system, the management and protection of the vulnerable stations should be given increased attention.

scholarly journals Transfer Coordination for Metro Networks during the Start- or End-of-Service Period

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Liqiao Ning ◽  
Peng Zhao ◽  
Wenkai Xu ◽  
Ke Qiao
Keyword(s):  
Integer Programming ◽  
Adverse Effects ◽  
Waiting Time ◽  
Programming Model ◽  
Mixed Integer ◽  
Service Period ◽  
Proposed Model ◽  
Transfer Success ◽  
Metro Networks

When travelling via metro networks during the start- or end-of-service period, transferring passengers may suffer a transfer failure. Accordingly, the synchronization timetabling problem necessitates consideration of transfer waiting time and transfer availability with respect to the first or last train. Hence, transfer train index (TTI) is formulated to identify the transfer train and calculate the transfer waiting time. Furthermore, two types of connection indexes, the last connection train index (LCTI) and the first connection train index (FCTI), are devised to distinguish transfer failure from transfer success, and the penalty constraints are implemented together to reflect the adverse effects of transfer failure. Then, a mixed integer programming model is developed to concurrently reduce transfer waiting time and improve transfer availability, which can be solved by CPLEX. Finally, a case study on Beijing metro network is made to verify the method. Experimental results show that our proposed model can yield synchronization solutions with significant reductions in both the average transfer waiting time and the proportion of transfer failure passengers.

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