At construction sites, safety signs are very important things to keep workers' safety. However, they have some problems, that is, 1) some materials and tools are necessary to set up or move them, for example, wire and pincers, 2) they cannot be stuck on finished surfaces because they may be worn off. To solve these problems, the new 'STICKER SIGN' was developed. It has adhesive on the reverse side like a seal to be stuck on walls without any tools even if they are finished. Forty sites were observed to find the problems, and forty-four signs were evaluated by one hundred and fifty workers to find the adequate design.
