Lines are grouped into historic operating divisions. As passenger service declined during the 1950's, many divisions were consolidated.
Chicago Division (Chicago-New Haven)
Fort Wayne Division (New Haven-Bellevue)
Cleveland Division (Bellevue-Euclid)
Cleveland Division (Euclid-Conneaut)
Clover Leaf District (Toledo-Delphos-Ohio State Line)
Clover Leaf District (Indiana State Line-Frankfort-Indiana State Line)
Clover Leaf District (Illinois State Line-Charleston-East St. Louis)
Peoria Division (Peoria-Illinois State Line)
Peoria Division (Indiana State Line-Lafayette)
Sandusky Division (Lafayette-Frankfort-Indiana State Line)
Sandusky Division (Ohio State Line-Sandusky)
New Castle Division (Fort Wayne-Rushville)
Indianapolis Division (Michigan City-Indianapolis)
District No. 1 (Toledo-Brewster)
District No. 2 (Brewster-Terminal Jct.)
District No. 3 (Cleveland-Harmon)
District No. 4 (Harmon-Zanesville)
Wheeling & Lake Erie (Branch Lines)
Pittsburgh Division (Pittsburgh Jct.-Rook)