chicago elevated 'el' train at rush hour on wacker & lasalle street corner in downtown loop.

bridge busy chicago commuters downtown elevated home hour intersection lights loop rush rushing street tracks train wacker america architecture beam built car city cityscape classic commute commuter dreary el gloomy illinois iron lake landmark metal mirrored moving outdoors outside overhead platform post reflection skyscraper spring states steel stoplight structure system tourism tourist transit transportation travel united urban drive speed lasalle