ACL
| Atlantic Coast Line | 12 |
AM
| Arkansas & Missouri | 1 |
APAC
| APAC | 2 |
AR
| Aberdeen and Rockfish | 3 |
ARR
| Alaska Railroad | 1 |
ARTX
| Artrain | 1 |
ASAB
| Bay Line Railroad LLC | 1 |
AT
| Auto Train | 1 |
ATLT
| Austin Todd and Ladd Railroad Company | 1 |
ATSF
| Atchison Topeka & Santa Fe | 82 |
BAP
| Butte Anaconda & Pacific | 2 |
BLA
| BLA | 1 |
BN
| Burlington Northern | 54 |
BO
| Baltimore & Ohio | 42 |
CBQ
| Chicago Burlington & Quincy | 26 |
CBRY
| Copper Basin Railway | 1 |
CCO
| Clinchfield | 1 |
CG
| Central Of Georgia | 3 |
CIM
| Chicago And Illinois Midland | 1 |
CN
| Canadian National Railways | 1 |
CNW
| Chicago & Northwestern | 2 |
CO
| Chesapeake & Ohio | 27 |
CR
| Conrail | 2 |
CRIP
| Chicago Rock Island & Pacific | 20 |
CRR
| Clinchfield | 8 |
CS
| Colorado & Southern | 8 |
CSX
| CSX Railroad | 6 |
CTS
| Cumbres & Toltec Scenic | 1 |
DH
| Delaware & Hudson | 1 |
DRG
| DRG | 1 |
DRGW
| Denver & Rio Grande Western | 23 |
DSL
| Denver & Salt Lake | 1 |
DTI
| Detroit Toledo & Ironton | 1 |
DTSL
| Detroit & Toledo Shore Line | 1 |
EJE
| Elgin Joliet and Eastern | 1 |
FEC
| Florida East Coast | 1 |
FWD
| Fort Worth & Denver | 2 |
GA
| Georgia Railroad | 2 |
GC
| Georgia Central | 1 |
GMO
| Gulf Mobile & Ohio | 5 |
GN
| Great Northern | 14 |
GNA
| Graysonia Nashville & Ashdown | 1 |
GTW
| Grand Trunk Western | 1 |
GWR
| Great Western Railway Company | 1 |
HVRX
| Heber Valley Historic Railroad | 1 |
IC
| Illinois Central | 21 |
ICG
| Illinois Central Gulf | 13 |
ITC
| Illinois Terminal Railroad | 1 |
KCCX
| Kennecott Utah Copper Corporation | 2 |
KCS
| Kansas City Southern | 3 |
KMC
| KMC | 1 |
KSCX
| KAPSTONE CHARLESTON KRAFT, LLC | 1 |
LC
| Lancaster & Chester | 1 |
LI
| Long Island Rail Road Company | 1 |
LN
| Louisville & Nashville | 40 |
LV
| Lehigh Valley | 1 |
MB
| Meridian & Bigbee | 1 |
MILW
| Milwaukee Road | 4 |
MKT
| Missouri-Kansas-Texas | 7 |
MON
| Monon Route | 2 |
MP
| Missouri Pacific | 69 |
MRL
| Montana Rail Link | 3 |
MSRC
| Kansas City Southern | 1 |
NCSL
| Nashville Chattanooga & St Louis | 1 |
NKP
| Nickel Plate | 23 |
NP
| Northern Pacific | 12 |
NS
| Norfolk Southern | 8 |
NSRM
| NSRM | 1 |
NW
| Norfolk & Western | 29 |
ORLC
| ORLC | 1 |
OWTX
| Oneida & Western Transportation | 1 |
PAL
| Paducah & Louisville | 1 |
PC
| Penn Central | 1 |
PE
| Peoria & Eastern | 5 |
PP
| PP | 2 |
PREX
| Pioneer Rail Equipment | 1 |
PWV
| Pittsburgh & West Virginia | 1 |
RESX
| Rescar | 1 |
RFP
| Richmond Fredericksburg & Potomac | 1 |
RGS
| Rio Grande Southern | 2 |
RSMX
| Reserve Mining | 2 |
SA
| Savannah & Atlanta | 1 |
SAL
| Seaboard Air Line | 17 |
SBD
| Seaboard System | 4 |
SC
| SC | 1 |
SCL
| Seaboard Coast Line | 40 |
SJGI
| SJGI | 1 |
SLSF
| Saint Louis-San Francisco | 22 |
SMAR
| SMAR | 1 |
SOO
| Soo Line | 6 |
SOU
| Southern | 64 |
SP
| Southern Pacific | 52 |
SPS
| Spokane Portland & Seattle | 1 |
SSW
| St Louis Southwestern (Cotton Belt) | 6 |
SWKR
| San Pedro and Southwestern Railway Compa | 2 |
TC1
| Tennessee Central | 2 |
TCG
| Tucson Cornelia and Gila Bend Railroad Company | 1 |
TF
| Tallulah Falls Ry. Co | 1 |
TOE
| Texas Oklahoma and Eastern RR Company | 1 |
TTI
| Transkentucky Transportation | 1 |
UP
| Union Pacific Railroad Company | 64 |
UR
| UR | 1 |
USAX
| United States Army | 1 |
VGN
| Virginian Railway | 2 |
WAB
| Wabash | 8 |
WM
| Western Maryland | 3 |
WP
| Western Pacific | 4 |
WRL
| WRL | 1 |
WSL
| WSL | 1 |