AERC
| Albany and Eastern Railroad Company | 7 |
AOK
| Arkansas-Oklahoma Railroad | 9 |
ATW
| Atlantic and Western | 2 |
BCOL
| Canadian National Railways | 8 |
BN
| Burlington Northern | 3 |
BNSF
| BNSF Railway | 8 |
BR
| Buffalo and Pittsburgh | 1 |
CBRY
| Copper Basin Railway | 5 |
CHTT
| Chicago Heights Terminal Transfer | 1 |
CLC
| Columbia and Cowlitz Railway Company | 3 |
CN
| Canadian National Railways | 10 |
CNA
| Canadian National Railways | 1 |
CP
| Canadian Pacific Railway | 2 |
CRLE
| Coe Rail Incorporated | 1 |
CSX
| CSX Railroad | 1 |
DWC
| Canadian National Railways | 6 |
FURX
| First Union Rail | 1 |
GNRR
| Georgia Northeastern | 2 |
GTW
| Grand Trunk Western | 4 |
HLSC
| Hampton Railway Incorporated | 9 |
IANR
| Iowa Northern Ry | 2 |
IBT
| International Bridge and Terminal Company | 2 |
IC
| Illinois Central | 1 |
KLRX
| KOCH RAIL LLC | 3 |
LRS
| Laurinburg and Southern | 1 |
LW
| Louisville and Wadley Railway Company | 1 |
MMA
| Montreal, Maine & Atlantic | 2 |
MSRC
| Kansas City Southern | 3 |
MSV
| Mississippi and Skuna Valley Railroad Co | 1 |
NDYX
| First Union Rail | 1 |
NOKL
| Northwestern Oklahoma | 12 |
NS
| Norfolk Southern | 22 |
SOO
| Soo Line | 8 |
SRY
| Southern Railway of British Columbia Lim | 1 |
TR
| Tomahawk Railway L.P. | 3 |
TTZX
| TTX Company-Centerbeam Flats | 40 |
UP
| Union Pacific Railroad Company | 10 |
WC
| Wisconsin Central | 1 |
WCRC
| Washington Central | 3 |
WPRR
| Willamette and Pacific | 1 |