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