Ключевые слова: background, bar, barricade, barrier, boundary, caution, city, closed, construction, construction site, danger, dirt, dirt road, entrance, entry, equipment, exit, fence, gate, grass, industry, lamp, nobody, object, old, outdoors, protection, red, reflector, repair, restricted, road, road work, safety, security, signal, signed, stop, street, symbol, traffic, transportation, urban, warning, work,