Ключевые слова: accident, area, attention, barricade, barrier, border, boundary, caution, concept, construction, crime, criminal, danger, detective, direction, enforcement, flag, forbidden, grass, green, hazard, investigation, justice, line, outdoor, park, police, prevention, protection, red, restricted, ribbon, risk, road, safety, scene, security, sign, stop, striped, summer, symbol, tape, tree, warning, white, zone,