A southbound Green line train approaches the busiest junction in Chicago, Tower 18 on the NW corner of the famed Loop 'L'.
A Green line train roars out of the Tube on the IIT Campus as it heads toward the next station, 35th Bronzeville IIT.
A NB Red line train carefully approaches the portal to the State Street subway.
A rerouted Red line train rolls through the curve at 40th St and S. Wabash Ave.
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