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Ralph Johnson, of the Chicago-based firm Perkins & Will was commissioned by the Chicago Architecture Foundation to participate in their exhibit Invisible City, where Johnson and two other Chicago architects (Brad Lynch of Brininstool + Lynch and Joe Valerio of Valerio Dewalt Train) created designs in response to three different city master plans. Johnson chose the Central Area Plan and responded with the Kennedy Expressway Green Corridor.

Kennedy Expressway Green Corridor.Chicago, Illinois