Mathematical Analysis of Road Blocking for Improving Evacuation Time from Tsunami

Abstract

On March 11th, 2011, the big earthquake occurred in the waters off Miyagi, Japan and huge tsunami came to Sanriku seacoast. After this disaster, government asks people to escape from tsunami not using car, but walking. However, many people used car to escape to hill in the cause of big earthquake and many traffic jam were to be found. From this background, we suggest to block several road links and making people using car in the case of emergency inconvenience. People can walk through blocked road, but car is not allowed. In the result of this suggestion, we can expect that people will tend not to use the car in the case of emergency and the number of links which cause traffic jam will be decreased. In this research, we will call into account of the choice of how to escape, and we set a goal of minimization of total time of evacuation thinking all evacuees.