Ключевые слова: alertness, background, blue, closeup, cloud, concept, copy space, country road, countryside, crossroad, danger, day, driving, environment, europe, information medium, information sign, italy, landscape, message, metal, metallic, modern, nature, octagon, outdoors, plant, red, road, road intersection, road sign, roadside, roadsign, rural scene, safety, sign, sky, stop, stop sign, street, sunny, symbol, text, traffic, transportation, tree, warning sign, weather, white,