Ключевые слова: ahead, attention, background, banner, blank, caution, circle, collection, concept, crossing, danger, design, direction, do, driving, enter, flat, forbidden, graphic, guard, hand, highway, icon, illustration, information, isolated, isometric, lane, law, message, no, object, octagon, red, road, safety, set, shape, sign, signal, stop, street, symbol, traffic, transport, transportation, warning, way, white,