ACL
| Atlantic Coast Line | 1 |
ACY
| Akron, Canton & Youngstown | 1 |
ATSF
| Atchison Topeka & Santa Fe | 7 |
BAR
| Bangor & Aroostook | 1 |
BCIT
| Canadian National Railways | 1 |
BM
| Boston & Maine | 1 |
BN
| Burlington Northern | 1 |
CAGY
| Columbus & Greenville Railway | 2 |
CBQ
| Chicago Burlington & Quincy | 6 |
CEI
| Chicago & Eastern Illinois | 1 |
CGW
| Chicago Great Western | 2 |
CIM
| Chicago And Illinois Midland | 1 |
CIRR
| Chattahoochee Industrial Railroad | 1 |
CN
| Canadian National Railways | 2 |
CNW
| Chicago & Northwestern | 2 |
CP
| Canadian Pacific Railway | 5 |
CPPX
| Consolidated Papers Incorporated | 1 |
CVC
| Canadian National Railways | 1 |
DJTX
| Joseph Transportation Incorporated | 1 |
EL
| Erie Lackawanna | 1 |
EN
| Esquimalt & Nanaimo | 1 |
FBOX
| TTX Company | 1 |
FEC
| Florida East Coast | 2 |
FWD
| Fort Worth & Denver | 2 |
GN
| Great Northern | 11 |
IATR
| Iowa Traction Railroad Company | 1 |
ITC
| Illinois Terminal Railroad | 1 |
LC
| Lancaster & Chester | 1 |
LN
| Louisville & Nashville | 2 |
MILW
| Milwaukee Road | 1 |
MISS
| Mississippian Railway Cooperative Incorporated | 1 |
MKT
| Missouri-Kansas-Texas | 3 |
MNS
| Minneapolis Northfield & Southern | 1 |
MON
| Monon Route | 1 |
MP
| Missouri Pacific | 3 |
MPA
| Maryland and Pennsylvania Railroad | 1 |
NCOK
| North Central Oklahoma | 1 |
NJII
| New Jersey, Indiana and Illinois | 1 |
NKCR
| Nebraska, Kansas & Colorado RailNet, Inc | 1 |
NOKL
| Northwestern Oklahoma | 1 |
NP
| Northern Pacific | 1 |
PICK
| Pickens Railway | 1 |
PLE
| Pittsburgh & Lake Erie | 1 |
RBBN
| Burlington Northern | 1 |
RFP
| Richmond Fredericksburg & Potomac | 1 |
RI
| RI | 1 |
ROCK
| Rock Island | 1 |
SCL
| Seaboard Coast Line | 1 |
SLC
| San Luis Central Railroad Company | 2 |
SLSF
| Saint Louis-San Francisco | 6 |
SP
| Southern Pacific | 2 |
SSW
| St Louis Southwestern (Cotton Belt) | 2 |
TM
| Texas-Mexican | 1 |
TOC
| Toledo & Ohio Central | 1 |
TP
| Texas & Pacific | 1 |
TPW
| Toledo Peoria & Western | 1 |
UCRY
| Utah Central | 1 |
UP
| Union Pacific Railroad Company | 6 |
VAMD
| Virginia and Maryland | 1 |
WAB
| Wabash | 3 |
WC
| Wisconsin Central | 1 |
WM
| Western Maryland | 1 |
WOV
| Warren & Ouachita Valley | 1 |
WP
| Western Pacific | 2 |
WRA
| Western Railway of Alabama | 1 |