AKMD
| Arkansas Midland Railroad Company | 26 |
AOK
| Arkansas-Oklahoma Railroad | 40 |
ATW
| Atlantic and Western | 30 |
BCIT
| Canadian National Railways | 2 |
BCOL
| Canadian National Railways | 39 |
BN
| Burlington Northern | 1 |
BNSF
| BNSF Railway | 25 |
CAGY
| Columbus & Greenville Railway | 3 |
CBRY
| Copper Basin Railway | 2 |
CHTT
| Chicago Heights Terminal Transfer | 2 |
CLC
| Columbia and Cowlitz Railway Company | 3 |
CN
| Canadian National Railways | 26 |
CORP
| Central Oregon & Pacific | 2 |
CP
| Canadian Pacific Railway | 1 |
CRLE
| Coe Rail Incorporated | 15 |
DWC
| Canadian National Railways | 16 |
EEC
| East Erie Commercial Railroad | 1 |
GAEX
| General American Marks Company | 1 |
GNRR
| Georgia Northeastern | 2 |
GTW
| Grand Trunk Western | 4 |
HLSC
| Hampton Railway Incorporated | 2 |
IC
| Illinois Central | 5 |
LMIC
| Lake Michigan & Indiana Railroad | 2 |
LW
| Louisville and Wadley Railway Company | 5 |
MMA
| Montreal, Maine & Atlantic | 1 |
MSRC
| Kansas City Southern | 2 |
NOKL
| Northwestern Oklahoma | 18 |
NS
| Norfolk Southern | 11 |
SERA
| Sierra Northern Railway | 1 |
SFLC
| BNSF Railway | 1 |
SGLR
| Seminole Gulf | 2 |
SOO
| Soo Line | 22 |
SRY
| Southern Railway of British Columbia Lim | 2 |
TNER
| Texas Northeastern Division Mid-Michigan | 1 |
TR
| Tomahawk Railway L.P. | 12 |
TSE
| Texas South-Eastern Railroad Company | 1 |
TTZX
| TTX Company-Centerbeam Flats | 24 |
UP
| Union Pacific Railroad Company | 30 |
WC
| Wisconsin Central | 13 |
WCTR
| WCTU Company White City Terminal Railway | 1 |
WPRR
| Willamette and Pacific | 1 |
WRWK
| Providence & Worchester Railroad | 1 |