Ключевые слова: abstract, alert, background, ban, car, caution, circle, cross, danger, design, do, element, entering, entrance, entry, european, forbidden, graphic, grunge, highway, icon, illustration, isolated, metal, no, not, object, old, prohibited, red, restricted, road, roadsign, round, safety, sign, signal, sketch, stop, street, symbol, traffic, transport, transportation, vintage, warning, way, white, wrong,