Ключевые слова: access, advertising, advice, alone, arrow, attention, ban, block, caution, come in, danger, dangers, design, direction, entrance, error, exclamation marc, hazards, icon, illustration, information, introduction, isolated, mark, message, no, not allowed, not safe, palm, prohibited sign, red, risk, road, safety, security, set, sign, silhouettes, stop, street, symbol, traffic, transport, trespassing, triangles, warning, web site, white, yellow,