Ключевые слова: access, advice, alertness, attention, ban, circle, concentration, danger, direction, do not enter sign, enter, entrance, entry, forbidden, graphic, hazard, highway, icon, illegal, illustration, information, information sign, label, law, mark, no, no trespassing sign, not, placard, prohibited, red, restriction, risk, road, road sign, round, rule, safety, security, sign, simplicity, stop, symbol, traffic, transport, warning, wrong,