Ключевые слова: abstract, ahead, alert, attention, background, black, blank, blue, border, careful, caution, closeup, cloudy, concept, danger, delta, detailed, driving, frame, gray, icon, idea, information, isolated, mark, note, point, post, rear, red, regulation, risk, road, safety, seen, sign, sky, space, street, symbol, traffic, transportation, triangle, triangular, vertical, walk, warning, way, weaving, white,