Ключевые слова: accident, attention, background, barricade, barrier, border, boundary, caution, cordon, crime, danger, dangerous, fence, forbidden, forest, grass, green, landscape, line, nature, outdoor, outdoors, police, protect, protection, red, restricted, restriction, ribbon, safety, security, sign, signal, site, stop, striped, symbol, tape, tree, warning, white, wood, zone,