2014 Volume 70 Issue 5 Pages I_85-I_92
It is reported that many residents in the local coastal plain area used a private vehicle to evacuate from the tsunami at the earthquake disaster on the east of Japan. Therefore it caused serious traffic congestion and the number of victims by tsunami had increased. In this study, the traffic demand of vehicle for evacuation is estimated at every 5 minute for the day in the target area with the database of the person trip survey. On the other hand, the traffic demand of commercial vehicle for evacuation is estimated with the database of the road traffic census survey. As the result of these estimations, the maximum of the evacuation demand by vehicle can be found in the target area. Moreover, the traffic congestion on the road network of the target area is estimated with the traffic simulator with the maximum evacuation demand by vehicle. The limited number of vehicles for evacuation according to the residential block can be calculated based on the traffic capacity of bottleneck of network. Finally, it can be concluded that the traffic demand by vehicles for evacuation should be restricted appropriately.
