elevated platform of chicago`s iconic transit system, the cta el train

cars classic crossing during gloomy historic houses iconic iron lake lights loop moves moving outdoor outside passing platform seen spring stairs steel stone street system through train architecture bridge bridgehouse building caution chicago city cityscape cold commute commuter concrete downtown drive el elevated exterior hour illinois pedestrians road rush sign sky tower tracks traffic transit transportation travel urban wacker water winter gray wall streetlight stoplight no turn arrow left restricted metra clinton tall transport