Quick Evacuation Method for Evacuation Navigation System in Poor Communication Environment at the Time of Disaster

In the event of a disaster, it is very important to quickly evacuate to evacuation sites in order to minimize the number of victims of the disaster. Municipal governments, etc. only present their citizens with information about the locations of evacuation sites and anticipated damages in the event of disasters such as tsunami and earthquakes. Thus, in the event of a disaster, people present at various places will not be sure about the evacuation routes that they should take individually. Accordingly, there is a need for a system for quickly determining evacuation routes and guiding people in accordance with the status of the traffic network, the locations of evacuation sites, and the number of victims. Various information distribution means for use in poor communication environments, as in the event of a disaster, have been proposed, including information distribution based on store-carry-forward communication. However, delays in information sharing are inevitable with any of the proposed methods, so that it is inevitable to guide people for evacuation based on information that may differ from the actual situation. In view of the above, in this paper, we propose a method of determining an evacuation guidance route in consideration of delays that occur in information sharing, and we evaluates the influence of the delays on evacuation guidance through simulation.