Measurements are conducted on group evacuation of simulated patients aided by working nurses using an actual hospital ward. Three types of auxiliaries for evacuation, stretchers, sheets and wheelchairs, are selected. Influences of the proportion of different types of auxiliaries and ambulatory patients, number of nurse, lighting conditions, and the existence of a corner on the evacuation route are studied. All components of the time to evacuate from bed to temporary refuge area are quantified. The analysis suggests the followings. (1) Existence of a corner has significant influence on the evacuation with stretchers. (2) Evacuation with auxiliaries occupying large area such as stretchers tends to be affected strongly by other evacuees. (3) Moving speed with stretchers and wheelchairs in a group evacuation is reduced by roughly 30-45% and 16-30% respectively from individual evacuation.
