Ключевые слова: ahead, alert, american, asphalt, attention, barricade, barrier, block, car, city, closed, cone, construction, construction site, danger, enclosure, equipment, fence, hazard, highway, industrial, infrastructure, maintenance, obstacle, orange, reconstruction, red, repair, road, road construction, road sign, roadwork, safe, safety, service, sign, signal, site, street, symbol, traffic, traffic sign, transportation, under, usa, vehicle, warning, work, worker,