Ключевые слова: america, american, architecture, background, blue, building, buildings, california, city, danger, day, direction, estate, freeway, highway, house, information, message, metal, navigation, nobody, object, octagon, old, outdoor, pole, red, road, roadside, rural, safety, side, sign, sky, stop, street, symbol, tourism, traffic, transportation, travel, urban, usa, warning, way,