BCOL
| Canadian National Railways | 2 |
COER
| Crab Orchard & Egyptian | 7 |
CR
| Conrail | 20 |
CSX
| CSX Railroad | 10 |
GACX
| General American Marks Company | 3 |
HS
| H and S Railroad Company | 4 |
IBT
| International Bridge and Terminal Company | 1 |
IC
| Illinois Central | 5 |
MP
| Missouri Pacific | 16 |
NKCR
| Nebraska, Kansas & Colorado RailNet, Inc | 2 |
NS
| Norfolk Southern | 2 |
NYC
| New York Central | 22 |
SP
| Southern Pacific | 9 |
SSW
| St Louis Southwestern (Cotton Belt) | 1 |
UP
| Union Pacific Railroad Company | 3 |
WRWK
| Providence & Worchester Railroad | 1 |