Measuring the vulnerability of public transport networks

Abstract

In the last years, studies on the vulnerability of public transport networks attract a growing attention because of the repercussions that incidents can have on the day-to-day functioning of a city. The aim of this paper is to develop a methodology for measuring public transport network vulnerability taking the Madrid Metro system as an example. The consequences of a disruptions of riding times or the number of missed trips are analysed for each of the network links with a full scan approach implemented in GIS (Geographic Information Systems). Using real trips distribution, each link in the network is measured for criticality, from which the vulnerability of lines and stations can be calculated. The proposed methodology also makes it possible to analyse the role of circular lines in network vulnerability and to obtain a worst-case scenario for the successive disruption of links by simulating a targeted attack on the network. Results show the presence of critical links in the southern part of the network, where line density is low and ridership high. They also highlight the importance of the circular line as an element of network robustness.

A New Systematic Approach to Vulnerability Assessment of Innovation Capability of Construction Enterprises

“…At present, scholars widely use the methodologies of vulnerability research to explore economic domains, such as financial vulnerability and household vulnerability [10,21,[33][34][35]. For example, Dominitz and Manski [17] first discussed the vulnerability of a country's economic system. United Nations Development Programme (UNDP) [35] defined the concept of economic vulnerability as the capability to suffer the damage due to the impact of unanticipated events in the process of economic development.…”

“…Vulnerability research has a wide range of applications, including climate change prediction, natural disaster prevention, food security, and public health improvement [10][11][12][13][14][15][16][17][18][19][20][21]. Generally, innovation vulnerability relates to the risk or uncertainty of a company's innovation capability.…”

“…This research was based on an inverse perspective of the relationship between uncertainty and innovation capability. Furthermore, it studied the vulnerability of CEIC and worked to build a system approach to assess the vulnerability of CEIC [11,13,[15][16][17]20,21,[25][26][27]. This new approach aimed to manage and reduce the vulnerability of CEIC and to support the sustainable improvement of CEIC.…”

“…It identified new areas of economic growth with potential broad impact on multiple Sustainability 2016, 8,17 3 of 25 industries. At an industrial level, the research may help governments, industrial associations, and other organizations implement targeted incentives for innovation planning, to reduce uncertainty and risk, to respond to an innovation-driven service economy, and to promote regional and national innovation.…”

Complexity and Vulnerability Analysis of Critical Infrastructures: A Methodological Approach

“…For example, the 22 June 2009 Washington metro collision, which resulted in the death of 9 people, the injury of 52 people, and economic losses of about 12 million dollars, was triggered by an initial fault in signal system. Moreover, the dramatic events like terrorist attacks have particularly long-lasting and far-reaching effects on the society, such as those that happened in 2004 in Madrid, in 2005 in London, and in 2010 in Moscow [6]. Hence, it can be said that capturing complexity of CIs will provide an important foundation for CIs safety operation.…”