| Barr Subdivision | 30.1 |
| Boswell Line | 21.3 |
| Brookville Subdivision | 25.9 |
| CED | 145.2 |
| CIND Subdivision | 79.4 |
| Chicago (INRD) | 65.2 |
| Chicago District | 151.1 |
| Chicago Line | 338.3 |
| Crawfordsville Branch | 46.2 |
| Danville Secondary | 41.5 |
| Decatur (CSXT) Subdivision | 84.8 |
| Elsdon Subdivision | 23.2 |
| Evansville Branch | 47.3 |
| Evansville Terminal | 23.4 |
| Fort Wayne Subdivision | 127.3 |
| Fostoria District | 117 |
| Frankfort Branch-District | 113.3 |
| Frankfort Secondary | 37.1 |
| Garrett Subdivision | 174.5 |
| Grand Rapids Subdivision | 130.1 |
| Henderson Subdivision | 145.2 |
| Huntington District | 106.7 |
| IHB Main Line | 41.8 |
| Illinois Subdivision | 73.9 |
| Indiana (CSXT) Subdivision | 168.6 |
| Indiana (TPW) Subdivision | 61.6 |
| Indianapolis (CSXT) Subdivision | 96.9 |
| Indianapolis (INRD) Subdivision | 153.5 |
| Indianapolis Belt | 11.6 |
| Indianapolis Line | 138.9 |
| Indianapolis Terminal | 23.9 |
| Kalamazoo Subdivision | 102.2 |
| Kankakee Branch | 128.6 |
| Kankakee Line | 33.5 |
| Lafayette District | 171.2 |
| Lafayette Line | 52 |
| Lakefront Subdivision | 11.3 |
| Lima (CFE) Subdivision | 126.2 |
| Louisville District (NS) Subdivision | 89.3 |
| Marion Branch | 110.9 |
| Matteson Subdivision | 46.1 |
| Michigan Line | 237.3 |
| Midland (INRD) Subdivision | 5.2 |
| Monon Subdivision | 163.4 |
| New Castle District | 165.2 |
| Petersburg Subdivision | 154 |
| Porter Subdivision | 18.9 |
| Rockport Branch | 12.4 |
| Shelbyville Secondary | 28.2 |
| South Bend Subdivision | 147.9 |
| Southern-East District | 106.2 |
| Southern-West District | 156.7 |
| St. Louis Line | 219 |
| Woodland Subdivision | 46.4 |
