AMTK
| Amtrak | 14 |
BN
| Burlington Northern | 7 |
CBQ
| Chicago Burlington & Quincy | 1 |
CGW
| Chicago Great Western | 30 |
CIM
| Chicago And Illinois Midland | 10 |
CNW
| Chicago & Northwestern | 117 |
CP
| Canadian Pacific Railway | 2 |
CTA
| Chicago Transit Authority | 7 |
CWEX
| Midwest Generation LLC | 25 |
CWI
| Chicago and Western Indiana | 26 |
EJE
| Elgin Joliet and Eastern | 8 |
IC
| Illinois Central | 20 |
IERM
| IERM | 2 |
IHB
| Indiana Harbor Belt | 2 |
IRMX
| III TRANSPORTATION | 1 |
IRYM
| Illinois Railway Museum | 15 |
KCS
| Kansas City Southern | 3 |
METX
| METRA | 21 |
MILW
| Milwaukee Road | 39 |
MP
| Missouri Pacific | 2 |
NICD
| Northern-Indiana Commuter Transportation | 6 |
NW
| Norfolk & Western | 1 |
SSW
| St Louis Southwestern (Cotton Belt) | 1 |
UP
| Union Pacific Railroad Company | 6 |
WEPX
| Wisconsin Electric Power Company | 1 |