This paper aims at suggesting strategy for supporting various activities, which are rescue, fire fighting, and transportation of relief commodities and others after earthquake occurs by utilizing road network model. These activities must be considered time pass from emergency .response to recovery after earthquake occurs. It means that the road network model for supporting these activities must consider the physical changes from the damage to the restoration. Firstly, we researched the case of the Great Hanshin-Awaji Earthquake regarding to physical damage and restoration of road. Secondly, we built road network model by using node expansion model and examined the way of description considered physical and chorological changes of road after earthquake occurs. In order to reflect some changes of road, we assigned the priority cost to nodes. Finally, we developed prototype to search shortest path by using priority node cost and Dijkstra in city of Yokohama.
