AM
| Arkansas & Missouri | 2 |
AOK
| Arkansas-Oklahoma Railroad | 2 |
ATSF
| Atchison Topeka & Santa Fe | 1 |
BN
| Burlington Northern | 2 |
BO
| Baltimore & Ohio | 1 |
BVRY
| Brandywine Valley Railroad Company | 2 |
CN
| Canadian National Railways | 1 |
CNW
| Chicago & Northwestern | 1 |
CR
| Conrail | 2 |
CTIE
| Kansas City Southern Railway Company | 1 |
CTRN
| Union Pacific Railroad Company | 1 |
DRGW
| Denver & Rio Grande Western | 1 |
GNRR
| Georgia Northeastern | 1 |
GRW
| Gary Railway | 1 |
GTW
| Grand Trunk Western | 1 |
GWWR
| Gateway Western | 2 |
JETX
| Jefferson Transportation LLC | 1 |
NYC
| New York Central | 1 |
RMDX
| American Refrigerator Transit Company | 1 |
SLSF
| Saint Louis-San Francisco | 1 |
SOO
| Soo Line | 1 |
TN
| Texas and Northern Railway Company | 1 |
WC
| Wisconsin Central | 1 |