AKMD
| Arkansas Midland Railroad Company | 3 |
AOK
| Arkansas-Oklahoma Railroad | 15 |
ATW
| Atlantic and Western | 15 |
BCOL
| Canadian National Railways | 10 |
BN
| Burlington Northern | 7 |
BNSF
| BNSF Railway | 15 |
CHTT
| Chicago Heights Terminal Transfer | 2 |
CLC
| Columbia and Cowlitz Railway Company | 5 |
CN
| Canadian National Railways | 17 |
CNA
| Canadian National Railways | 3 |
CRLE
| Coe Rail Incorporated | 4 |
CSX
| CSX Railroad | 5 |
DWC
| Canadian National Railways | 7 |
FURX
| First Union Rail | 2 |
GNRR
| Georgia Northeastern | 1 |
GTW
| Grand Trunk Western | 7 |
HE
| Hollis and Eastern Railroad Company | 1 |
HLSC
| Hampton Railway Incorporated | 11 |
IC
| Illinois Central | 3 |
LMIC
| Lake Michigan & Indiana Railroad | 2 |
LW
| Louisville and Wadley Railway Company | 4 |
MEC
| Maine Central | 1 |
MMA
| Montreal, Maine & Atlantic | 5 |
NOKL
| Northwestern Oklahoma | 20 |
NS
| Norfolk Southern | 10 |
SERA
| Sierra Northern Railway | 1 |
SOO
| Soo Line | 2 |
TR
| Tomahawk Railway L.P. | 12 |
TTZX
| TTX Company-Centerbeam Flats | 47 |
UNK
| UNK | 1 |
UP
| Union Pacific Railroad Company | 2 |
WC
| Wisconsin Central | 6 |
WCRC
| Washington Central | 8 |