AOK
| Arkansas-Oklahoma Railroad | 1 |
ATSF
| Atchison Topeka & Santa Fe | 1 |
BN
| Burlington Northern | 5 |
BO
| Baltimore & Ohio | 2 |
CBQ
| Chicago Burlington & Quincy | 1 |
CO
| Chesapeake & Ohio | 3 |
CR
| Conrail | 1 |
CSX
| CSX Railroad | 14 |
DUPX
| Du Pont De Nemours and Company Incorporated | 1 |
GMO
| Gulf Mobile & Ohio | 1 |
GNRR
| Georgia Northeastern | 1 |
IC
| Illinois Central | 1 |
ICG
| Illinois Central Gulf | 1 |
KCS
| Kansas City Southern | 1 |
LA
| Lousiana and Arkansas | 1 |
LDRR
| Louisiana and Delta Railroad Incorporated | 1 |
LN
| Louisville & Nashville | 4 |
MB
| Meridian & Bigbee | 1 |
MESX
| Mears/CPG Incorporated | 1 |
MKT
| Missouri-Kansas-Texas | 2 |
MP
| Missouri Pacific | 2 |
MSRC
| Kansas City Southern | 1 |
NCSL
| Nashville Chattanooga & St Louis | 10 |
NS
| Norfolk Southern | 4 |
NW
| Norfolk & Western | 5 |
OWTX
| Oneida & Western Transportation | 1 |
SAN
| Sandersville | 1 |
SBD
| Seaboard System | 3 |
SCL
| Seaboard Coast Line | 2 |
SOU
| Southern | 21 |
SSW
| St Louis Southwestern (Cotton Belt) | 1 |
TUGX
| Texas Utilities Mining Company | 2 |
TVRM
| Tennessee Valley | 1 |
UP
| Union Pacific Railroad Company | 1 |