ATSF
| Atchison Topeka & Santa Fe | 3 |
CNW
| Chicago & Northwestern | 6 |
CR
| Conrail | 5 |
DTI
| Detroit Toledo & Ironton | 3 |
GTW
| Grand Trunk Western | 1 |
ICG
| Illinois Central Gulf | 1 |
MILW
| Milwaukee Road | 3 |
MP
| Missouri Pacific | 9 |
NS
| Norfolk Southern | 3 |
NYC
| New York Central | 3 |
PLTX
| Potlatch Corporation | 1 |
SOU
| Southern | 2 |
SP
| Southern Pacific | 3 |
SSW
| St Louis Southwestern (Cotton Belt) | 2 |
UP
| Union Pacific Railroad Company | 1 |
WP
| Western Pacific | 1 |