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Keywords from Image Description:
HEAVY TRAFFIC ON THE DAN RYAN EXPRESSWAY IN CHICAGO ILLINOIS. IT IS THE BUSIEST IN THE UNITED STATES WITH ... NARA . Scope and content General notes Local identifier DA Environmental Protection Agency NARAAuthor White John Photographer File HEAVYTRAFFICONTHEDANRYANEXPRESSWAYINCHICAGOILLINOIS ITISTHEBUSIESTINTHEUNITEDSTATESWITH