Ключевые слова: barrier, blocked, blocking, boundary, care, caution, city, city centre, city tunnel, color key, colored, colorkey, construction barrier, construction industry, construction site, construction works, cordon, cordoning off, diversion, equipment, fence, forbidden, improvement, magdeburg, obstacle, obstruction, prohibition, protection, red, road construction, road traffic, roadblock, roadside, safety, shade, shadow, shutoff, sidewalk, site, site fence, street, traffic, warning, working,