ATSF
| Atchison Topeka & Santa Fe | 3 |
GMO
| Gulf Mobile & Ohio | 1 |
IC
| Illinois Central | 3 |
ICG
| Illinois Central Gulf | 4 |
KCS
| Kansas City Southern | 4 |
LNW
| Louisiana & Northwestern | 2 |
MP
| Missouri Pacific | 10 |
SP
| Southern Pacific | 4 |
SSW
| St Louis Southwestern (Cotton Belt) | 2 |
UP
| Union Pacific Railroad Company | 3 |
WP
| Western Pacific | 1 |