Ключевые слова: alert, asphalt, attention, background, barricade, barrier, black, boundary, building, caution, construction, danger, forbidden, hazard, icon, illustration, industrial, industry, isolated, obstacle, reconstruction, red, repair, road, roadsign, roadwork, safety, security, sign, signs, site, stop, street, symbol, traffic, transport, transportation, urban, warning, white, work, worker,