AGR
| Alabama and Gulf Coast | 7 |
ALM
| Arkansas Louisiana and Mississippi Railr | 3 |
AOK
| Arkansas-Oklahoma Railroad | 6 |
ATW
| Atlantic and Western | 6 |
BAEX
| Andersons | 2 |
BAR
| Bangor & Aroostook | 1 |
BM
| Boston & Maine | 2 |
BNSF
| BNSF Railway | 1 |
CCR
| Corinth & Counce | 1 |
CNW
| Chicago & Northwestern | 9 |
CSX
| CSX Railroad | 8 |
EEC
| East Erie Commercial Railroad | 66 |
FCCM
| Compania de Ferrocarriles Chiapas Mayab | 1 |
FRR
| Falls Road Railroad Company Incorporated | 2 |
GNWR
| Genesee and Wyoming Railroad Company | 1 |
GTRA
| Golden Triangle Railroad | 1 |
HS
| H and S Railroad Company | 8 |
KCS
| Kansas City Southern | 24 |
KRR
| Kiamichi | 1 |
LRWN
| Little Rock & Western | 2 |
MEC
| Maine Central | 12 |
MMA
| Montreal, Maine & Atlantic | 4 |
MRL
| Montana Rail Link | 2 |
MSDR
| Knoxville & Holston River Railroad | 1 |
NS
| Norfolk Southern | 3 |
PDRR
| Pee Dee River RR | 1 |
SLC
| San Luis Central Railroad Company | 1 |
SLGG
| Progress Rail Services Corporation | 1 |
SOU
| Southern | 1 |
SP
| Southern Pacific | 2 |
SRN
| Sabine River & Northern | 7 |
SSW
| St Louis Southwestern (Cotton Belt) | 1 |
WC
| Wisconsin Central | 5 |
WCCL
| Wisconsin Central | 3 |
WCOR
| Wellsboro and Corning Railroad Company | 1 |