Surrounded by rush hour traffic on the Dan Ryan expressway, a Chicago Transit Authority (CTA) "L" train heads down the Red Line.

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Size: 5100px × 3400px
Location: Chicago, IL
Photo credit: © Nick Suydam / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: auto, car, chicago, city, commute, commuter, complex, efficient, el, electric, energy, evening, green, highway, hour, il, illinois, line, mass, passenger, rail, red, rush, subway, train, transit, transportation, travel, urban