ACL
| Atlantic Coast Line | 1 |
AMTK
| Amtrak | 54 |
ATSF
| Atchison Topeka & Santa Fe | 14 |
BA
| Baltimore & Annapolis | 1 |
BO
| Baltimore & Ohio | 13 |
CA
| Chesapeake & Albemarle | 1 |
CBQ
| Chicago Burlington & Quincy | 21 |
CEI
| Chicago & Eastern Illinois | 2 |
CN
| Canadian National Railways | 4 |
CNW
| Chicago & Northwestern | 7 |
CO
| Chesapeake & Ohio | 5 |
CP
| Canadian Pacific Railway | 1 |
CRIP
| Chicago Rock Island & Pacific | 2 |
CS
| Colorado & Southern | 3 |
CV
| Central Vermont | 1 |
DH
| Delaware & Hudson | 3 |
DLW
| Delaware Lackawanna & Western | 1 |
DMIR
| Duluth Missabe & Iron Range | 1 |
DRGW
| Denver & Rio Grande Western | 2 |
DSSA
| Duluth, South Shore & Atlantic | 1 |
ERIE
| Erie Railroad | 2 |
FEC
| Florida East Coast | 1 |
GMO
| Gulf Mobile & Ohio | 1 |
GN
| Great Northern | 5 |
GTW
| Grand Trunk Western | 4 |
IC
| Illinois Central | 1 |
ITC
| Illinois Terminal Railroad | 1 |
LN
| Louisville & Nashville | 16 |
MILW
| Milwaukee Road | 11 |
MKT
| Missouri-Kansas-Texas | 4 |
MNCR
| Metro North Commuter Railway | 1 |
MON
| Monon Route | 2 |
MP
| Missouri Pacific | 6 |
MSTL
| Minneapolis & St Louis | 1 |
NH
| New Haven | 7 |
NKP
| Nickel Plate | 3 |
NP
| Northern Pacific | 11 |
NW
| Norfolk & Western | 1 |
NYC
| New York Central | 16 |
ONT
| Ontario Northland Railway | 1 |
PC
| Penn Central | 4 |
PE
| Peoria & Eastern | 1 |
PLE
| Pittsburgh & Lake Erie | 1 |
PRR
| Pennsylvania Railroad | 17 |
SLSF
| Saint Louis-San Francisco | 5 |
SOO
| Soo Line | 3 |
SOU
| Southern | 10 |
SP
| Southern Pacific | 20 |
SPS
| Spokane Portland & Seattle | 1 |
UP
| Union Pacific Railroad Company | 10 |
VT
| Virginia & Truckee | 1 |
WAB
| Wabash | 3 |
WP
| Western Pacific | 2 |