Measuring urban road network vulnerability using graph theory : the case of Montpellier's road network

Measuring urban road network vulnerability using graph theory : the case of Montpellier's road network

[SHS:GEO] Humanities and Social Sciences/Geography

accessibility

graph modelling

Montpellier

risk

urban road network

vulnerability

congestion

disruption

strategic links

The urban road network provides spatial access to the city through an overlapping hierarchy, ranging from highways to local access streets. This pattern of network organisation has led to an increased propensity to vulnerability, exposing parts of the city to sharp decreases in accessibility when traffic blockages occur on the main links or at junctions. Our aim is to define road network vulnerability and to measure the road network's exposure to risk. We postulate that the network morphology, structure and level of congestion can be influencing factors. Two vulnerability indices which pinpoint accessibility loss in the city by removing links and vertices one by one, have been developed to assess the network's vulnerability.

Appert, Manuel

Laurent, Chapelon

La mise en carte des risques naturels

2007

ENG

preprint

http://halshs.archives-ouvertes.fr/halshs-00841520

http://halshs.archives-ouvertes.fr/docs/00/84/15/20/PDF/Vulnerability_Appert_Chapelon.pdf