Development an Accessibility Approach to Rank the Transportation Network Components During the Occurrence of Flood Crisis (Golestan Province Case Study)

One of the most paramount problems after occurrence the flood crisis is the prioritization of reconstructing the components of roads network. One of the characteristics which have important role in this matter is accessibility index. It means that the more important role to accessibility to whole of the network, the more significance for reconstructing after flood crisis. At present study, it has been tried that with using of accessibility index the reconstruction of roads network of Golestan province is prioritized. For this reason at first the roads network of Golestan province was modeled by EMME2 software and then the modeled network was loaded based on the daily traffic volume at current statue. According to previous researches, the accessibility index includes two main parameters, parameter of volume traffic and parameter of distance dimension. At present study it has been tried that composed of these two mentioned parameters, were used as an accessibility index. At next step, with supposing that each of the roads network components was disrupted under flood crisis, the accessibility index was calculated before and after disrupting the links for whole of the network. The difference between two accessibility indexes was used as a significance degree of disrupted link for reconstruction after flood crisis. The higher degree of significance for disrupted link, the higher prioritization for reconstructing