moving elevated el train, part of chicago`s iconic transit system, passing over chicago river where water taxi transports commuter

along area beams bolts brick bridge bridgehouse buildings bulb busy chicago chicagos city cityscape classic commute concrete crossing downtown during elevated fixture from gloomy hour iconic iron lake light lights looking loop march moving nuts outdoors outside over overhead part passing path pedestrian pier platform post quick quickly railing river riverwalk rush seen spring stairs steel street structure system tracks train transit transportation tree urban used water wells which windows taxi boat yellow transport