ALS
| Alton & Southern Railway | 1 |
AMTK
| Amtrak | 2 |
AN
| Apalachicola Northern | 2 |
APA
| Apache Railway Company | 1 |
ARTX
| Artrain | 2 |
ATSF
| Atchison Topeka & Santa Fe | 35 |
AVL
| Aroostook Valley Railroad Company | 1 |
AWP
| Atlanta & West Point | 1 |
BAR
| Bangor & Aroostook | 2 |
BCH
| Southern Railway of British Columbia Limited | 4 |
BCOL
| Canadian National Railways | 4 |
BLE
| Bessemer & Lake Erie | 1 |
BML
| Belfast & Mooshead Lake | 1 |
BN
| Burlington Northern | 30 |
BO
| Baltimore & Ohio | 1 |
CAGY
| Columbus & Greenville Railway | 2 |
CBQ
| Chicago Burlington & Quincy | 2 |
CCO
| Clinchfield | 2 |
CCT
| Central California Traction Company | 6 |
CLC
| Columbia and Cowlitz Railway Company | 2 |
CLP
| Clarendon and Pittsford | 1 |
CMER
| CMER | 2 |
CN
| Canadian National Railways | 9 |
CNW
| Chicago & Northwestern | 11 |
CO
| Chesapeake & Ohio | 3 |
COP
| City of Prineville Railway | 2 |
CP
| Canadian Pacific Railway | 6 |
CR
| Conrail | 6 |
CRIP
| Chicago Rock Island & Pacific | 5 |
CRR
| Clinchfield | 6 |
CV
| Central Vermont | 6 |
CWR
| CWR Incorporated | 1 |
DH
| Delaware & Hudson | 2 |
DODX
| Department Of Defense | 1 |
DQE
| De Queen and Eastern Railroad Incorporat | 1 |
DRGW
| Denver & Rio Grande Western | 22 |
EUKA
| EUKA | 2 |
FCP
| Ferrocarril Del Pacifico | 10 |
FNM
| Ferrocarriles Nacionales de Mexico | 1 |
GA
| Georgia Railroad | 4 |
GN
| Great Northern | 3 |
GT
| GT | 2 |
GTW
| Grand Trunk Western | 1 |
GWR
| Great Western Railway Company | 1 |
ICG
| Illinois Central Gulf | 1 |
KCS
| Kansas City Southern | 2 |
LINC
| Lewis and Clark Railway Company | 2 |
LMS
| LMS | 1 |
LN
| Louisville & Nashville | 2 |
LNW
| Louisiana & Northwestern | 2 |
LVRC
| Lamoille Valley | 1 |
MAA
| Magma Arizona Railroad Company | 2 |
MB
| Meridian & Bigbee | 1 |
MEC
| Maine Central | 1 |
MILW
| Milwaukee Road | 8 |
MKT
| Missouri-Kansas-Texas | 3 |
MNRR
| Modoc Northern Railroad Company | 1 |
MNS
| Minneapolis Northfield & Southern | 1 |
MP
| Missouri Pacific | 14 |
MRL
| Montana Rail Link | 1 |
NDEM
| NDEM | 4 |
NLG
| Kansas City Southern Railway Company (North Louisiana & Gulf) | 2 |
NW
| Norfolk & Western | 1 |
OCE
| Oregon California & Eastern | 5 |
ONW
| Oregon & Northwestern | 1 |
OTVR
| Otter Tail Valley Railroad Company | 1 |
PGE
| Pacific Great Eastern | 2 |
PLE
| Pittsburgh & Lake Erie | 1 |
PNWR
| Portland and Western Railroad Incorporat | 1 |
PVS
| Pecos Valley Southern Railway Company | 2 |
RI
| RI | 5 |
RSP
| Roscoe Snyder and Pacific Railway | 2 |
SBC
| Ferrocarril Sonora Baja California | 7 |
SCL
| Seaboard Coast Line | 5 |
SERA
| Sierra Northern Railway | 1 |
SJVR
| San Joaquin Valley RR | 2 |
SLSF
| Saint Louis-San Francisco | 6 |
SMA
| San Manuel Arizona Railroad Company | 1 |
SMV
| Santa Maria Valley Railroad Company | 3 |
SN
| Sacramento Northern | 1 |
SOO
| Soo Line | 2 |
SOU
| Southern | 3 |
SP
| Southern Pacific | 14 |
SPS
| Spokane Portland & Seattle | 1 |
SRY
| Southern Railway of British Columbia Lim | 2 |
SSW
| St Louis Southwestern (Cotton Belt) | 3 |
SWKR
| San Pedro and Southwestern Railway Compa | 1 |
TCG
| Tucson Cornelia and Gila Bend Railroad Company | 2 |
TOE
| Texas Oklahoma and Eastern RR Company | 2 |
TPL
| TPL | 1 |
TPLC
| TPLC | 1 |
TRC
| Trona Railway Company | 2 |
TRRA
| Terminal RR of St Louis | 2 |
TS
| Texas Southern | 1 |
UP
| Union Pacific Railroad Company | 10 |
URR
| Union Railroad | 2 |
UTAH
| Utah Railway | 6 |
WA
| Washington & Atlanta Railroad | 2 |
WCRC
| Washington Central | 1 |
WM
| Western Maryland | 2 |
WNFR
| Kanawha Rail Corporation | 1 |
WP
| Western Pacific | 12 |
WPMW
| Union Pacific Railroad Company | 2 |
WPRR
| Willamette and Pacific | 3 |
WTCX
| Weyerhauser | 4 |
WVR
| Willamette Valley | 1 |
WVRC
| WABASH VALLEY RAILROAD CO. | 1 |
YILX
| YILX | 1 |