AERC
| Albany and Eastern Railroad Company | 1 |
AOK
| Arkansas-Oklahoma Railroad | 1 |
BCOL
| Canadian National Railways | 1 |
BN
| Burlington Northern | 1 |
BNSF
| BNSF Railway | 1 |
CBQ
| Chicago Burlington & Quincy | 1 |
CIC
| Cedar Rapids & Iowa City | 2 |
CNW
| Chicago & Northwestern | 1 |
CR
| Conrail | 1 |
CSX
| CSX Railroad | 1 |
FBOX
| TTX Company | 1 |
FXE
| Ferromex | 1 |
GMO
| Gulf Mobile & Ohio | 1 |
GN
| Great Northern | 1 |
GVSR
| Galveston Railroad L.P. | 1 |
HATX
| Helm Financial Corporation | 3 |
HLMX
| Helm Financial Corporation | 2 |
IATR
| Iowa Traction Railroad Company | 1 |
IBT
| International Bridge and Terminal Company | 1 |
ICG
| Illinois Central Gulf | 2 |
MDW
| Minnesota Dakota and Western Railway Com | 1 |
MEC
| Maine Central | 3 |
MILW
| Milwaukee Road | 1 |
MP
| Missouri Pacific | 3 |
SLSF
| Saint Louis-San Francisco | 2 |
SRN
| Sabine River & Northern | 2 |
STE
| Stockton Terminal and Eastern RR | 1 |
SVRY
| SVRY | 1 |
TBOX
| TTX Company | 2 |
UP
| Union Pacific Railroad Company | 9 |
WAB
| Wabash | 1 |
WP
| Western Pacific | 2 |
WSOR
| Wisconsin & Southern | 1 |