Elsdon Subdivision (Chicago-Munster)
South Bend Subdivision (Munster-South Bend)
South Bend Subdivision (South Bend-Battle Creek)
Flint Subdivision (Battle Creek-Port Huron)
Holly Subdivision (Detroit-Durand)
Grand Rapids Subdivision (Durand-Grand Haven)
Mount Clemens Subdivision (West Detroit-Port Huron)
Saginaw Subdivision (Durand-Saginaw-Bay City)
Greenville Subdivision (Ashley-Greenville-Muskegon)
Cass City Subdivision/Romeo Subdivision/Jackson Subdivision
Main Line (Detroit-Michigan State Line)
Main Line (Ohio State Line-Ironton)
Dearborn Branch (DT&I Jct.-Rouge Yard)
Tecumseh Branch (Malinta-Ohio State Line)
Tecumseh Branch (Michigan State Line-Tecumseh)