Ключевые слова: 20, ahead, alert, alley, area, asphalt, attention, bright, building, caution, city, colorful, construction, danger, disadvantaged, dormitory, empty, equipment, highway, industry, infrastructure, nobody, pattern, pavement, problem, repair, road, roadworks, russia, safety, sign, signs, site, slow down, speed, stop, street, symbol, traffic, transport, trees, triangle, urban, vehicle, view, warning, way, work, yellow,