Ключевые слова: alert, black, caution, closeup, color, construction, danger, digging, dirt, grunge, icon, industrial, industry, isolated, men, metal, old, red, road, roadsign, rotten, rusty, safety, scratched, security, sign, signal, signs, silhouette, site, stop, street, symbol, traffic, triangle, under, urban, used, warning, weathered, white, work, worker, working, yellow,