AA
| Ann Arbor | 1 |
ATSF
| Atchison Topeka & Santa Fe | 2 |
BGFX
| Barnabus Group Foundation | 1 |
BLE
| Bessemer & Lake Erie | 2 |
BN
| Burlington Northern | 2 |
BRC
| Belt Railway of Chicago | 1 |
CBQ
| Chicago Burlington & Quincy | 2 |
CIL
| Chicago Indianapolis & Louisville (Monon | 8 |
CNW
| Chicago & Northwestern | 1 |
CO
| Chesapeake & Ohio | 2 |
CR
| Conrail | 7 |
CRIP
| Chicago Rock Island & Pacific | 1 |
CSL
| Chicago Short Line Railway Company | 6 |
CSS
| Chicago South Shore And South Bend | 12 |
CSX
| CSX Railroad | 3 |
DRGW
| Denver & Rio Grande Western | 1 |
EJE
| Elgin Joliet and Eastern | 7 |
EL
| Erie Lackawanna | 7 |
GMO
| Gulf Mobile & Ohio | 1 |
GTW
| Grand Trunk Western | 3 |
IAIS
| Iowa Interstate | 7 |
IC
| Illinois Central | 6 |
ICG
| Illinois Central Gulf | 1 |
IHB
| Indiana Harbor Belt | 33 |
ITC
| Illinois Terminal Railroad | 2 |
JJRR
| J and J Railroad | 1 |
LMIX
| Loram Maintenance of Way Inc. | 1 |
MILW
| Milwaukee Road | 3 |
MON
| Monon Route | 9 |
NKP
| Nickel Plate | 16 |
NP
| Northern Pacific | 1 |
NW
| Norfolk & Western | 4 |
NYC
| New York Central | 3 |
PM
| Pere Marquette | 1 |
SCIH
| South Chicago & Indiana Harbor Railway C | 3 |
SOO
| Soo Line | 5 |
WAB
| Wabash | 4 |