Ключевые слова: abstract, background, barricades, black, bright, building, caution, closed, closeup, color, colorful, cones, construction, delay, equipment, flashers, funnel, hard, hat, hazard, highway, light, orange, outdoor, prohibit, pylons, red, repair, road, roadwork, safe, safety, sign, site, street, symbol, traffic, transportation, travel, urban, warning, white, work, zone,