In the case of emergency that requires all the occupants to evacuate from a high-rise building, a method of “phased evacuation” is said to be effective for avoiding congestion in the staircase. However, some occupants will feel anxiety because they are requested to stay there until the other occupants in different floors finish evacuating. This study examines how giving information of phased evacuation influence mental state of the occupants. As a result, disseminating the scheme of phased evacuation and giving detailed information to whole the building decrease anxiety while waiting time, and lead to evacuation as planned.
