Around 1950, Chicago & Eastern Illinois changed from named districts to named subdivisions. Missouri Pacific had adopted named subdivisions earlier. In 1967, Missouri Pacific acquired Chicago & Eastern Illinois. As a condition of the merger, in 1969 the main line south to Danville and Evansville was sold to Louisville & Nashville. In 1982 Missouri Pacific became part of Union Pacific, which continues to use named subdivisions.
Villa Grove Subdivision (Chicago-Dolton)
Villa Grove Subdivision (Dolton-Woodland Jct.)
Villa Grove Subdivision (Woodland Jct.-Villa Grove)
Pana Subdivision (Villa Grove-Lenox)
Salem Subdivision (Findlay Jct.-Salem)
Mt. Vernon Subdivision (Salem-Benton Jct.)
Marion Subdivision/Joppa Subdivision (Benton Jct.-Vienna Jct.-Bridge Jct./Joppa)
Cissna Park Subdivision (Cissna Jct.-Goodwine-Cissna Park)
Abandoned Lines
C&EI Westville Subdivision (Danville-Villa Grove)
Chester Subdivision (Valley Jct.-Illmo)
Mt. Vernon Subdivision (Benton Jct.-Gorham)
Pinckneyville Subdivision (Chester-Mt. Vernon)
Sparta Subdivision (Salem-Hoyleton-Kellogg)
Abandoned Lines
Cairo Subdivision/Marion Subdivision