PRIORITY RANK ESTIMATION OF DISASTER PREVENTION BASE FOR ROAD NETWORK RELIABILITY

Abstract

As ‘network reliability’, road networks are required to connect important bases even in large-scale disasters for life-saving and quick recovery. Many studies proposed the methodologies for evaluating the network reliability, however only a few studies answered “Which base should be used for evaluation as important one?” In this paper, the problems of the current disaster prevention base are organized, and the priority ranks of disaster prevention base are estimated. At first, from the viewpoint of road network reliability, the current state of disaster prevention base designation in the regional disaster prevention plan across the country was arranged. As a results, we presented that there is no criterion for disaster prevention bases designation and the type of designated bases are different between prefectures. Based on that, we estimated the simple priority ranks of disaster prevention bases which stably obtained with many areas / assumptions. By clarifying this estimated ranks as the national unity standard, we will be able to improve the network reliability efficiently.