Abstract
Ensuring the connection of the road network is an urgent needs in Japan where are a lot of disaster such as an earthquake or the guerrilla rainstorm. In addition, nowadays the effectively and deliberate road improvement plan is needed because of the financial difficulties. For this reason, it is necessary to evaluate comprehensively the improvement of the consolidated reliability of the road network and the cost for the infrastructure improvement.
Upon consolidated reliability calculation of the road network, this study is possible to avoid the ambiguity due to the approximate solution by calculating an exact solution, and reduces the calculating cost of the consolidated reliability by using the topology converting.
