AMTK
| Amtrak | 1 |
ATEX
| Asplundh Tree Expert Co Railroad Division | 1 |
BN
| Burlington Northern | 1 |
BNSF
| BNSF Railway | 1 |
BO
| Baltimore & Ohio | 1 |
CATS
| Charlotte Area Transit System | 1 |
CBL
| Conemaugh and Black Lick Railroad | 1 |
CGW
| Chicago Great Western | 4 |
CNW
| Chicago & Northwestern | 8 |
CP
| Canadian Pacific Railway | 7 |
CR
| Conrail | 12 |
CSX
| CSX Railroad | 3 |
EJE
| Elgin Joliet and Eastern | 1 |
HZGX
| Herzog Contracting Corporation | 2 |
IC
| Illinois Central | 3 |
METX
| METRA | 3 |
MKT
| Missouri-Kansas-Texas | 3 |
MPX
| COLUMBIAN CARBON CO., MAGNETIC PIGMENT DIV. | 1 |
NS
| Norfolk Southern | 5 |
NW
| Norfolk & Western | 3 |
PC
| Penn Central | 1 |
SOO
| Soo Line | 1 |
SOU
| Southern | 3 |
SPSX
| Progress Rail Services Corp | 1 |
SSW
| St Louis Southwestern (Cotton Belt) | 1 |
UP
| Union Pacific Railroad Company | 5 |