CTA Red, Green line trains

A CTA northbound Green Line "L" train, top, and a southbound Red Line "L" train, bottom, pass each other at the Dan Ryan Expressway near the CTA Red Line 63rd Street station in Chicago on Tuesday, May 14, 2013. With the $425 million Red Line reconstruction project, many commuters will be rerouted via buses to the Green Line.
Jose M. Osorio / Chicago Tribune
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