Ключевые слова: abstract, arrow, art, background, banner, billboard, black, blank, board, caution, concept, construction, danger, design, direction, directional, element, empty, frame, graphic, highway, icon, illustration, information, isolated, object, post, road, roadsign, safety, sign, signboard, signpost, site, stop, street, symbol, traffic, transport, transportation, travel, warning, way, web, website, white, work, yellow,