Remoteness and accessibility in the vulnerability analysis of regional road networks

Taylor, Michael A.P.; Susilawati,

doi:10.1016/j.tra.2012.02.008

Cited by 109 publications

(76 citation statements)

References 9 publications

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“…(Jenelius, 2009, Jenelius, 2010, Berdica, 2002, Rashed and Weeks, 2003, Taylor and Susilawati, 2012, Brenkert and Malone, 2005, arising from different interpretations of the concept of vulnerability and the scope of analysis. In general there are two main methods; use of a network wide screen (Jenelius et al, 2006) and techniques based on pre-selection of potentially vulnerable links according to a set of of criteria (Knoop et al, 2012).…”

Section: Vulnerability Assessment Methods and Indicatorsmentioning

confidence: 99%

An assessment method for highway network vulnerability

Rashidy

Grant-Muller

2014

Journal of Transport Geography

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This paper introduces a methodology to assess the level of vulnerability of road transport networks. A new technique based on fuzzy logic and exhaustive search optimisation is used to combine vulnerability attributes with different weights into a single vulnerability index for network links, which may be used to measure the impact of disruptive events. The network vulnerability index is then calculated using two different aggregations: an aggregated vulnerability index based on physical characteristics and an aggregated vulnerability index based on operational characteristics. The former uses link physical properties such as its length and the number of lanes, whilst the latter reflects aspects of the network flow. The application of the methodology on a synthetic network (based on Delft city, Netherland) demonstrates the ability of the technique to estimate variation in the level of vulnerability under different scenarios. The method also allows exploration of how variation in demand and supply impact on overall network vulnerability, providing a new tool for decision makers to understand the dynamic nature of vulnerability under various events. The method could also be used as an evaluation tool to gauge the impact of particular policies on the level of vulnerability for the highway network and highlight weaknesses in the network.

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Section: Vulnerability Assessment Methods and Indicatorsmentioning

confidence: 99%

An assessment method for highway network vulnerability

Rashidy

Grant-Muller

2014

Journal of Transport Geography

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“…Although public transport networks are more sensitive when it comes to vulnerability, until a few years ago most research was carried out on road networks, particularly when done from a geographical perspective or for transport planning purposes (see, for example : Berdica, 2002;Berdica and Mattsson, 2007;Chen et al, 2012;Erath et al, 2008;Jenelius, 2009Jenelius, , 2010Jenelius and Mattsson, 2012;Taylor et al, 2006;Taylor and Susilawati, 2012). In these cases, a frequently used indicator was accessibility.…”

Section: Transport Network Vulnerability Assessmentmentioning

confidence: 99%

“…This index is used to measure changes in trip times associated with the reordering of all the traffic when one of the links becomes unusable. On a regional scale, Taylor and Susilawati (2012) set out to identify the most critical locations in a situation of degradation on a road network in south east Australia, using a remoteness indicator (the opposite of accessibility) to assess all the localities in the region. Another element of network vulnerability is increased congestion.…”

Section: Approaches Adoptedmentioning

confidence: 99%

Measuring the vulnerability of public transport networks

Rodríguez-Núñez

Palomares

2014

Journal of Transport Geography

204

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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.

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“…To date, there is no a widely accepted definition of vulnerability (Berdica 2002;Taylor 2003, Knoop et al 2008;Taylor and Susilawati 2012): there are numerous definitions proposed in literature with correspondingly numerous methodologies and indicators that try to describe and quantify the consequences of hazardous events (such as debris-flows, avalanches, rock falls, car-accidents and even natural disasters or terrorist attacks) or, more generally, of disturbances into the functionality of a transport network. These disturbances occur with a certain probability and have as their primary effect a reduction in link capacity and/or a variation in demand (Sumalee and Kurauchi 2006;Snelder et al 2012).…”

Section: Conceptual Frameworkmentioning

confidence: 99%

The Evaluation of Road Network Vulnerability in Mountainous Areas: A Case Study

et al. 2014

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This paper deals with the issue of road network vulnerability, with special reference to a mountainous area case. It describes the implementation of a methodology that ranks links of a network according to their importance in maintaining a proper connectivity between all origin-destination pairs. Such a ranking can be particularly helpful in prioritising maintenance investments to be planned along the links of a road network.Following a conceptual approach observed in transport literature, we consider vulnerability to be connected to importance, i.e. a measure of the consequences of the collapse of a network element. In the present study we introduce a new definition of importance -with respect to a given link -that simultaneously includes two aspects: its level of usage, i.e. how many people typically use the link when travelling in a given time window, and the impact that the closure of that link could have on the general functionality of the network as a whole.The methodology proposed was implemented in order to obtain a ranking of importance for the links of a real-scale network, i.e. the road network of the Province of Bolzano, a highly mountainous area located in the Italian Alps.

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Remoteness and accessibility in the vulnerability analysis of regional road networks

Cited by 109 publications

References 9 publications

An assessment method for highway network vulnerability

An assessment method for highway network vulnerability

Measuring the vulnerability of public transport networks

The Evaluation of Road Network Vulnerability in Mountainous Areas: A Case Study

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