Ключевые слова: blue, boundary, closed, color image, construction, construction barrier, construction site, danger, equipment, fence, gray, horizontal, industry, mesh, metal, outdoors, plastic, protection, red, road, road construction, road sign, road signal, road warning sign, safety, security, security barrier, sidewalk, sign, stability, standing, steel, street, striped, sunlight, vibrant color, warning sign, warning symbol, white,