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AN ASSESSMENT OF RESILIENCE OF REGIONAL ROAD NETWORKS AGAINST LARGE SCALE EARTHQUAKES

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  • 大規模震災に対する各地域の道路ネットワークレジリエンス評価

Abstract

Japan faces great risk of natural disasters and it is concerned that there will be other large-scale disasters which may cause fatal damage to important functions for maintaining administration as well as social and economic systems. In order to avoid such kind of situations, recently it is said to be important to make resilient national land. However, assessments of Resilience of infrastructures against the specific risks of future disaster have not been done yet, even though it is quite important to promote National Resilience. Therefore, this study conducted assessments of Resilience of regional road networks against Nankai Trough Giant Earthquake and inland earthquake in Tokyo, based on expected travel time. For the preparation of the data set, we applied probe vehicle data to estimate the probability of shut down of roads and velocity change ratio under various conditions. As a result of that, widespread existence of relatively vulnerable regional road networks against Nankai Trough Giant Earthquake was revealed. At the same time, it was suggested that the reinforcement strategies can greatly mitigate the harmful effect of the disaster.

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