Ключевые слова: architecture, blue, bridge, building, chicago, city, citylife, cityscape, commuting, direction, elevated, glass, illinois, industrial, iron, landscape, lines, loop, metal, metro, orange, outdoors, pink, platform, public, purple, rail, railroad, railway, speed, station, steel, structure, subway, the loop, tourism, tournarounds, tracks, traffic, train, transit, transport, transportation, travel, urban, urbanization, usa,