Ключевые слова: ahead, alert, arrow, attention, background, blue, board, business, caution, cloud, concept, copyspace, danger, day, direction, directional, drive, green, guide, highway, icon, information, isolated, message, nature, notice, object, pointer, road, roadside, roadsign, safety, sign, signage, signpost, sky, stop, street, symbol, text, traffic, transportation, travel, warning, way, white, yellow,