chicago`s iconic transit system, the elevated el train, speeds over wells street spanning the chicago river

cars classic crossing during gloomy historic houses iconic iron lake lights loop moves moving outdoor outside passing platform reflection river seen spring stairs steel steps stone street system through train architecture bridge bridgehouse building caution chicago city cityscape cold commute commuter commuters concrete downtown drive el elevated exterior hour illinois pedestrians restricted road rush sign sky snow staircase tower tracks traffic transit transportation travel urban wacker water winter speed