Ключевые слова: airport, background, barricade, barrier, barriers, border, boundary, caution, close up, color, construction, danger, design, entrance, entry, equipment, forest, gate, icon, isolated, line, macro, no, object, pattern, pole, protection, protects, red, ribbon, road, roadblock, safety, security, sign, station, stop, stripe, striped, subway, symbol, tape, traffic, train, transparent, transportation, warning, way, white, winter,