Evaluation of the Maximum Cognitive Distance per Exit Sign Lighting Colour

Exit sign lightings shorten evacuation time by informing evacuees of the direction to a safe area . As the information included in the exit sign lighting is easily recognized by evacuees, the time required for route choice and probability of moving in the wrong direction are reduced. In this study, we examined a method to improve cognitive performance using the exit sign lighting color. The maximum cognitive distance was measured for seven colors (red, orange, yellow, green, blue, navy, and purple) in the visible region, from which the exit sign lighting color with the best cognitive performance was derived. The red, blue, navy, and purple have longer maximum cognitive distance than green, which is mainly used in Korea. However, there are no statistically significant differences.