内水氾濫に起因する道路交通障害予測に関する研究

抄録

This study treats the degree and characteristics of traffic difficulties caused by urban inundation by heavy rainfall. The studied area is Kyoto City, Japan. First, in the normal condition, time-of-day user equilibrium traffic assignment is performed and traffic condition on network is computed. Next, assuming heavy rainfall, inundation flow analysis is executed to obtain the water depth distribution. The similar traffic analysis is performed in the inundation condition, by changing run speed and traffic capacity based on the computed water depth of each link. Then, degree of congestion and travel time between major ODs are compared and discussed for the normal condition and the inundation one. As a result, it is found that inundation at underpass link of JR line has huge effect on the traffic network all over the city.