Title: Road network vulnerability assessment based on fragile factor interdependencies in spatial-functional perspectives
Authors: Hsieh, Cheng-Hsien
Feng, Cheng-Min
運輸與物流管理系 註:原交通所+運管所
Department of Transportation and Logistics Management
Keywords: road network vulnerability;interdependency;geographic information system (GIS);fuzzy cognitive maps (FCMs)
Issue Date: 1-Jan-2014
Abstract: Road networks are instrumental in resource allocation and preevacuation, and profoundly affect disaster response and recovery, particularly emergent-disaster logistics and island rescues. Disruptions to road networks impair daily operations, irrespective of whether they are damaged by external forces or failures in interacting elements. However, functional interdependency is absent from transportation vulnerability assessments. This study thus constructed a framework to assess the interdependent vulnerability of road network failures. Based on eleven fragile factors developed in the literature and an empirical case study in the Taipei metropolitan area, road network vulnerability is determined by fuzzy cognitive maps and geographic information systems for functional and spatial interactions, respectively. The analytical results indicate that road network vulnerability is underestimated if the interdependency is neglected. Delay time on the shortest substitution, level of service on adjacent links, and inaccessibility to hospital emergency centers significantly affect vulnerability. Whereas certain socioeconomic resilience is performed in the short term, spatial-functional interdependency dilutes those effects in the long term. The framework developed facilitates decision makers in understanding interdependent vulnerabilities and adopting appropriate strategies to improve vulnerability.
URI: http://dx.doi.org/10.1068/a4664
ISSN: 0308-518X
DOI: 10.1068/a4664
Volume: 46
Begin Page: 700
End Page: 714
Appears in Collections:Articles