Ключевые слова: ahead, alert, arrow, background, black, carefully, caution, color, curve, curvy, danger, dangerous, foot, hazard, icon, journey, line, metal, mountain, nobody, outdoors, pathway, risk, risky, road, roadsign, roadway, sign, sky, slow, speed, square, street, symbol, traffic, transportation, travel, warning, winding, yellow, yield,