Ключевые слова: access, admission, alert, allowed, anti, attention, background, caution, closed, concept, danger, dangerous, denied, design, entrance, entry, forbid, forbidden, human, illegal, keep, label, law, man, no entry, notice, permission, person, private, prohibit, prohibited, prohibition, protection, red, restriction, road, round, safety, screw, security, sign, signal, silhouette, site, stop, symbol, travel, warn, warning, white,