2020 Volume 76 Issue 2 Pages I_9-I_17
This study proposes a gradual road recovery plan after a large-scale disaster. There are two steps in the plan. First, the plan selects only roads that connect critical facilities and are outside of a catastrophic area as recovered roads based on the improvement of the accessibility. Then, it selects the rest of the roads in the same procedure.
Sukumo city, Kochi prefecture, was selected as the case-study area for this study. The city has a disaster risk of the Nankai Trough Earthquake in the future. The disaster can cause tsunami and ground subsidence, and these events can disrupt roads and cause long-term floods in the central part of the city.
The proposed plan was applied to the city, defining a long-term flooded area as a catastrophic area. As a result, it confirmed that the proposed plan could proceed the second step before the restoration of all the roads at the first step. Furthermore, it clarified that the plan could improve the accessibility between critical facilities than a plan that does not consider gradual recovery.
