[2] The station was also served by the Chicago and Eastern Illinois Railroad from 1904 to 1913, during a period of control by the St. Louis–San Francisco Railway.

At its peak the station serviced 52 of the 100 largest cities in the United States.

[5] Upon the decline of intercity passenger traffic, and PRR and NYC's merger into Penn Central (and that railroad's bankruptcy and reorganization into Conrail), much of the trackage has been removed, and the commuter trains on the Metra Rock Island District no longer stop at the station, which was closed in the late 1970s.

The former tracks of the Pennsylvania are now owned by the Norfolk Southern Railway and still carry freight and intercity Amtrak passengers to Union Station.

[2] The station is currently the site of the Norfolk Southern 63rd Street intermodal transfer terminal.