ATSF
| Atchison Topeka & Santa Fe | 10 |
BRC
| Belt Railway of Chicago | 2 |
CBQ
| Chicago Burlington & Quincy | 3 |
CC
| Chicago Central & Pacific | 4 |
CCT
| Central California Traction Company | 1 |
CGW
| Chicago Great Western | 1 |
CNW
| Chicago & Northwestern | 2 |
DRGW
| Denver & Rio Grande Western | 21 |
DSNG
| Durango & Silverton Narrow Gauge Railroa | 2 |
EJE
| Elgin Joliet and Eastern | 1 |
GN
| Great Northern | 3 |
GTW
| Grand Trunk Western | 2 |
HVRX
| Heber Valley Historic Railroad | 3 |
IC
| Illinois Central | 4 |
ICG
| Illinois Central Gulf | 1 |
KCCX
| Kennecott Utah Copper Corporation | 3 |
MILW
| Milwaukee Road | 3 |
NCB
| Nevada Copper Belt | 9 |
NP
| Northern Pacific | 2 |
NWP
| Northwestern Pacific Railroad Company | 2 |
OCSR
| OCSR | 8 |
ORLC
| ORLC | 5 |
PC
| Penn Central | 3 |
PE
| Peoria & Eastern | 4 |
PLC
| PLC | 14 |
RCBT
| RCBT | 2 |
RPRC
| Richmond Pacific Railroad Corporation | 1 |
SN
| Sacramento Northern | 22 |
SOO
| Soo Line | 3 |
SP
| Southern Pacific | 52 |
SPS
| Spokane Portland & Seattle | 3 |
SRYC
| Sierra Railway Company of California | 3 |
SSW
| St Louis Southwestern (Cotton Belt) | 3 |
UP
| Union Pacific Railroad Company | 33 |
VT
| Virginia & Truckee | 1 |
WP
| Western Pacific | 14 |
WRLC
| WRLC | 2 |
WSLC
| WSLC | 3 |