AKMD
| Arkansas Midland Railroad Company | 26 |
AOK
| Arkansas-Oklahoma Railroad | 39 |
ATW
| Atlantic and Western | 30 |
BCOL
| Canadian National Railways | 27 |
BNSF
| BNSF Railway | 15 |
CAGY
| Columbus & Greenville Railway | 2 |
CBRY
| Copper Basin Railway | 2 |
CHTT
| Chicago Heights Terminal Transfer | 2 |
CLC
| Columbia and Cowlitz Railway Company | 3 |
CN
| Canadian National Railways | 25 |
CORP
| Central Oregon & Pacific | 2 |
CP
| Canadian Pacific Railway | 1 |
CRLE
| Coe Rail Incorporated | 13 |
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 |
IC
| Illinois Central | 5 |
LW
| Louisville and Wadley Railway Company | 5 |
NOKL
| Northwestern Oklahoma | 15 |
NS
| Norfolk Southern | 5 |
SERA
| Sierra Northern Railway | 1 |
SFLC
| BNSF Railway | 1 |
SGLR
| Seminole Gulf | 1 |
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 |
TTZX
| TTX Company-Centerbeam Flats | 19 |
UP
| Union Pacific Railroad Company | 4 |
WC
| Wisconsin Central | 13 |
WCTR
| WCTU Company White City Terminal Railway | 1 |
WPRR
| Willamette and Pacific | 1 |
WRWK
| Providence & Worchester Railroad | 1 |