Abstract
Every municipalities designate urgent transportation routes as go on smoothly rescue and transport relief supplies in preparation for disaster. On preparation of life-extending repair plan, the bridges on urgent transportation route evaluated one of the important factors, but it is not examined that the urgent transportation network is active or not in times of disaster.
This study aims to examine the ability to maintain urgent transportation network under the increase of bridge destruction risk associated with bridge deterioration, and furthermore visualize the result. These analytical processes in this study indicate that the disruption risk of network with few damaged bridge is increasing.
