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The main purpose of this study was to improve the guide to excellence in public relations for evacuation signage to prevent casualties. This research analyzed people’s perception of evacuation signage for natural disasters such as tsunami, earth quake and flood. The quantitative survey of 400 respondents in Thailand (300 Thai and 100 foreigners) was used to find out how they reacted to the evacuation signage. It investigated people’s perception based their personalities which were specified by geometrical psychology. The results revealed that majority of the respondents had a personality of good listener and harmonizer and they preferred yellow circle for the evacuation sign.