Abstract
This paper discusses evacuation environments of passengers at a tunnel fire accident. The visibility of testees entered in the model tunnel on a fire, are investigated by the questionnaire. As a result, the following was clarified. It is thought that it is possible to evacuate to the first stage of a fire under stratified thermal smoke layer. However, it is thought that testees cannot evacuate when smoke is filled around testees and the density of smoke Cs becomes about 0.25 (1/m). Next, discusses an establishment height of illumination. We change an establishment height of illumination and experimented. As a result, view of testees are kept in long time by making an establishment height low.
