Ключевые слова: access, accident, alert, area, attention, background, band, barricade, barrier, black, boundary, caution, construction, crime, danger, dangerous, emergency, equipment, forbidden, hazard, hazardous, illustration, information, isolated, line, object, plastic, police, protection, red, repair, ribbon, risk, safe, safety, security, sign, signal, site, stop, street, strip, striped, symbol, tape, traffic, warning, white, work, yellow,