Ключевые слова: alerts, arrow, asphalt, background, black, blue, car, caution, curve, danger, dangerous, direction, down, downhill, drive, gear, grade, green, highway, hill, landscape, law, lower, mountain, red, reduce, right, road, roadside, roadsign, safety, sign, slope, speed, steep, street, symbol, traffic, transport, transportation, travel, truck, use, warning, way,