Network-based Accessibility Measures for Vulnerability Analysis of Degradable Transportation Networks

Chen, Anthony; Yang, Chao; Kongsomsaksakul, Sirisak; Liu, Ming

doi:10.1007/s11067-006-9012-5

Cited by 253 publications

(126 citation statements)

References 12 publications

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“…This means that during PT disturbances fewer locations and activities can be reached by public transport within a certain travel time, resulting in a decreased accessibility. This relation between network vulnerability and accessibility is among others addressed by Chen et al (2007), Liao and Van Wee (2017) and Taylor (2017). Therefore, reducing the passenger impact of disturbances is important in order to limit the negative accessibility effects.…”

Section: Introductionmentioning

confidence: 82%

Identification and quantification of link vulnerability in multi-level public transport networks: a passenger perspective

et al. 2018

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Robust public transport networks are important, since disruptions decrease the public transport accessibility of areas. Despite this importance, the full passenger impacts of public transport network vulnerability have not yet been considered in science and practice. We have developed a methodology to identify the most vulnerable links in the total, multi-level public transport network and to quantify the societal costs of link vulnerability for these identified links. Contrary to traditional single-level network approaches, we consider the integrated, total multi-level PT network in the identification and quantification of link vulnerability, including PT services on other network levels which remain available once a disturbance occurs. We also incorporate both exposure to large, non-recurrent disturbances and the impacts of these disturbances explicitly when identifying and quantifying link vulnerability. This results in complete and realistic insights into the negative accessibility impacts of disturbances. Our methodology is applied to a case study in the Netherlands, using a dataset containing 2.5 years of disturbance information. Our results show that especially crowded links of the light rail/metro network are vulnerable, due to the combination of relatively high disruption exposure and relatively high passenger flows. The proposed methodology allows quantification of robustness benefits of measures, in addition to the costs of these measures. Showing the value of robustness, our work can support and rationalize the decision-making process of public transport operators and authorities regarding the implementation of robustness measures.

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Section: Introductionmentioning

confidence: 82%

Identification and quantification of link vulnerability in multi-level public transport networks: a passenger perspective

et al. 2018

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“…A number of studies have already looked at the vulnerability and resilience of transport networks from various perspectives (Caschili et al 2015). For example, Chen et al (2007) examines the vulnerability of transport networks when a certain link fails by considering the impacts on individuals' choice of trip, mode, and route and then calculating the new accessibility of the overall network. Cats and Jenelius (2014) models the vulnerability of public transport networks to service disruptions and the degree to which real-time information can improve resilience.…”

Section: Vulnerability As a Way To Model Disparities In Accessibilitymentioning

confidence: 99%

The TUM Accessibility Atlas: Visualizing Spatial and Socioeconomic Disparities in Accessibility to Support Regional Land-Use and Transport Planning

Büttner

Kinigadner

et al. 2018

Netw Spat Econ

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In recent years, the city of Munich has become more crowded due to its strong job market and its popularity as a tourist destination, resulting in a shortage of affordable housing and a strained transport network. It became evident that the city of Munich could not solve these problems alone, and would need close cooperation with neighboring municipalities that considered the various stakeholders. In 2007, this resulted in the formation of the Metropolitan Region of Munich, home to nearly six million people from 27 counties and 6 large cities, and includes 158 participating institutions. In 2009, the TUM Accessibility Atlas was developed for this newly formed region after numerous discussions with a variety of regional stakeholders who described their needs in assessing land-use and transport measures. The major task of this tool was to meet these needs and support this diverse region find a common regional identity.Keywords Accessibility . Accessibility instruments . PSS . Governance . Decisionmaking . Accessibility planning The TUM Accessibility Atlas brings together various scientific measures of accessibility that have been developed over time and applies them to relevant issues in the field of integrated land use and transport planning. The primary usability issue addressed by this tool is the need for more trust and a shared language between stakeholders. The main planning issue is determining how the region can improve multimodal accessibility, becoming more environmentally sustainable while also identifying spatial and socioeconomic disparities to address. Given these purposes, the TUM Accessibility Atlas was set up as a GIS toolbox, capable of producing maps for specific case studies and their thematic issues. The two major datasets are a multi-modal transport network and the structural land-use layers. The public transport network is based on a VISUM transport model imported into a GIS based accessibility instrument. Initially, the street network was initially provided by the Bavarian State Office for Statistics and Data Processing, but later substituted by OpenStreetMap (OSM), due to the flexibility of the open source data and the greater detail available for non-motorized transport modes. The structural component was provided by numerous sources (e.g. gaining suitable data by web survey) which included geo-referenced data on activities and their respective densities. These datasets have been constantly updated and upgraded in line with the current issues of different areas. Over the course of various research projects, new scales and suitable add-on tools have been added. To help visualize spatial and socioeconomic disparities, the TUM Accessibility Atlas has explored the relative accessibility of the region by public vs private transport, mismatches between the population density and public transport service quality, and the vulnerability of the region to future increases in mobility costs. Different methods and scales have been integrated: from micro-scale accessibility within neighborhood...

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“…The vulnerability level of an element depends on the role it plays in the network structure. It is necessary to identify the weak points in the network for the sake of mitigating vulnerability [56]. In a particular case, such as catastrophic event, priority must be given to some critical nodes or edges over others to rebuild and recover the whole system [35].…”

Section: Proposed Frameworkmentioning

confidence: 99%

Complexity and Vulnerability Analysis of Critical Infrastructures: A Methodological Approach

Deng

Song

Zhou

et al. 2017

Mathematical Problems in Engineering

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Vulnerability analysis of network models has been widely adopted to explore the potential impacts of random disturbances, deliberate attacks, and natural disasters. However, almost all these models are based on a fixed topological structure, in which the physical properties of infrastructure components and their interrelationships are not well captured. In this paper, a new research framework is put forward to quantitatively explore and assess the complexity and vulnerability of critical infrastructure systems. Then, a case study is presented to prove the feasibility and validity of the proposed framework. After constructing metro physical network (MPN), Pajek is employed to analyze its corresponding topological properties, including degree, betweenness, average path length, network diameter, and clustering coefficient. With a comprehensive understanding of the complexity of MPN, it would be beneficial for metro system to restrain original near-miss or accidents and support decision-making in emergency situations. Moreover, through the analysis of two simulation protocols for system component failure, it is found that the MPN turned to be vulnerable under the condition that the high-degree nodes or high-betweenness edges are attacked. These findings will be conductive to offer recommendations and proposals for robust design, risk-based decision-making, and prioritization of risk reduction investment.

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Network-based Accessibility Measures for Vulnerability Analysis of Degradable Transportation Networks

Cited by 253 publications

References 12 publications

Identification and quantification of link vulnerability in multi-level public transport networks: a passenger perspective

Identification and quantification of link vulnerability in multi-level public transport networks: a passenger perspective

The TUM Accessibility Atlas: Visualizing Spatial and Socioeconomic Disparities in Accessibility to Support Regional Land-Use and Transport Planning

Complexity and Vulnerability Analysis of Critical Infrastructures: A Methodological Approach

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