South Side Elevated Railroad
CTA - Chicago 'L'
(Cook County, Illinois)Built in stages 1892 to 2021. CTA created October 1, 1947 by combining all previous rapid transit lines.Viaduct and tunnel system across entire City of Chicago on Chicago Transit AuthorityOpen to traffic
CTA Green Line/IC Overpass
(Cook County, Illinois)Opened April 23, 1892; Closed March 4, 1982; Removed 1984Lost Pennsylvania through truss bridge over Illinois Central Railroad on Chicago Transit Authority Green LineRemoved
CTA Stockyards Line/CWI Overpass
(Cook County, Illinois)Built 1907; Removed 1957Lost Through truss bridge over Chicago & Western Indiana Railroad on Chicagoo Transit AuthorityRemoved