<p>Combined route map of the Chicago Central Railroad (red) and Illinois Central Railroad (blue) as they existed in 1996.
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Map by Sean Lamb (<a href="//commons.wikimedia.org/wiki/User:Slambo" title="User:Slambo">User:Slambo</a>), January 14, 2006.  State outlines and water feature names cropped from <a href="//commons.wikimedia.org/wiki/File:US_state_outline_map.png" title="File:US state outline map.png">Image:US_state_outline_map.png</a>, routes, city dots, city and state names added with the GIMP.
No machine-readable author provided. <a href="//commons.wikimedia.org/wiki/User:Slambo" title="User:Slambo">Slambo</a> assumed (based on copyright claims).
No machine-readable source provided. Own work assumed (based on copyright claims).