Lines are grouped into historic operating divisions. As passenger service declined during the 1950's, many divisions were consolidated.
Burlington Route historically named its subdivisions by the end points.
Chicago & Aurora Subdivision
Aurora & Galesburg Subdivision
Aurora & Savanna Subdivision
Rockford & Flag Center Subdivision
Savanna & La Crosse Subdivision (Savanna-East Dubuque)
Savanna & La Crosse Subdivision (East Dubuque-La Crosse)
La Crosse & St. Croix Subdivision
Galesburg & Quincy Subdivision
Galesburg & Savanna Subdivision
Buda & Vermont Subdivision
CB&Q OTTUMWA DIVISION
Galesburg & Ottumwa Subdivision
Beardstown Subdivision (Bushnell-Paducah)
Beardstown & St. Louis Subdivision