Ключевые слова: advise, arrow, background, black, business, caution, city, close, closeup, commuter, direct, direction, door, electric, electricity, empty, entrance, exit, fast, floor, gate, green, guide, indoor, line, metro, passenger, platform, railway, reflect, safety, sign, speed, stand, station, subway, suggest, symbol, train, transit, transport, transportation, travel, urban, wait, walk, warning, way, white, yellow,