首页|PREDICTION OF TRAFFIC DIFFICULTIES CAUSED BY INUNDATION DUE TO HEAVY RAINFALL IN KYOTO CITY
PREDICTION OF TRAFFIC DIFFICULTIES CAUSED BY INUNDATION DUE TO HEAVY RAINFALL IN KYOTO CITY
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This study deals with traffic problems in the Kyoto urban area due to inundations caused by heavy rainfall. First, under normal conditions, a "time-of-day" user equilibrium traffic assignment is performed and traffic conditions on the network are computed. Next, assuming a heavy rainfall, an inundation flow analysis by means of unstructured meshes is made to obtain the water depth distribution. A similar traffic analysis is performed under inundation conditions, by changing the travel speed and traffic capacity based on the computed water depth of each link. Then, the degree of congestion and the travel time between major ODs are compared and discussed for normal conditions and when inundations occur. We found that the inundations at the southwest of the studied area including the underpass of JR line has an effect on the traffic network all over the city, and that traffic difficulties change with the beginning of rainfall, namely, the temporal change of inundation.
Shin Fukakusa、Keiichi Toda、Nobuhiro Uno
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CTI Engineering Co. Ltd., Chuo-Ku, Osaka, Japan
Disaster Prevention Research Institute, Kyoto University, Uji, Kyoto, Japan
Engineering, Kyoto University, Nishikyo-ku, Kyoto, Japan
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