区間重複を考慮した地方都市部道路網の冗長性指標に関する一考察

抄録

Disruption of highway in a disaster time can be an obstacle for a search and rescue operation, refuge activity and a fire-fighting activity, which can prevent from quick recovery. Therefore, it is important to build road network with a certain level of redundancy for a region resilient against disasters. This study aims at showing an evaluation framework of road network redundancy by employing a concept of centrality from social network analysis. Comparing with existing studies, this approach can deal with overlap section between alternative routes, and a result of calculating the redundancy index shows a big difference whether or not overlap section has been considered.