VULNERABILITY ASSESSMENT OF URBAN RAILWAY NETWORKS IN CONSIDERATION OF THE DISRUPTION OF MULTIPLE LINKS

Abstract

The object of this study is to develop the method to assess the vulnerability of urban railway networks in consideration of disruption of multiple links assuming the occurrence of an earthquake directly under the capital city. Vulnerability assessment index that total value of generalized cost weighed OD trip volume and percentage of inaccessible OD trip volume by disruption of the links were calculated in the Tokyo metropolitan area. As a result, it was shown that the index value is high not only in the central area but also in the suburbs as the epicenter, and the proportion of the OD trip volume which became impossible to move to the destination due to the disruption of many links is high in the zone including the disrupted link but the proportion decreases if there is an alternative route.