ATSF
| Atchison Topeka & Santa Fe | 7 |
BBCX
| ABB Power Generation Incorporated | 1 |
BN
| Burlington Northern | 1 |
BO
| Baltimore & Ohio | 1 |
CR
| Conrail | 1 |
DM
| Detroit & Mackinac | 1 |
ICG
| Illinois Central Gulf | 2 |
KCS
| Kansas City Southern | 1 |
KXHR
| Knoxville & Holston River RR | 1 |
LN
| Louisville & Nashville | 2 |
LNE
| Lehigh and New England Ry | 1 |
MP
| Missouri Pacific | 1 |
NS
| Norfolk Southern | 3 |
NYSW
| New York Susquehanna & Western | 3 |
PAL
| Paducah & Louisville | 1 |
RR
| Raritan River | 1 |
SOU
| Southern | 1 |
UP
| Union Pacific Railroad Company | 4 |