ACL
| Atlantic Coast Line | 4 |
ACWR
| Aberdeen, Carolina & Western | 4 |
AIKR
| AIKR | 3 |
AR
| Aberdeen and Rockfish | 6 |
ARTX
| Artrain | 1 |
BK
| BK | 1 |
BN
| Burlington Northern | 1 |
BO
| Baltimore & Ohio | 2 |
CO
| Chesapeake & Ohio | 11 |
CPRX
| Carolina Power and Light Company | 4 |
CR
| Conrail | 1 |
CRR
| Clinchfield | 2 |
CSX
| CSX Railroad | 21 |
CTR
| Clinton Terminal Railroad Company | 1 |
DODX
| Department Of Defense | 5 |
DQE
| De Queen and Eastern Railroad Incorporat | 1 |
GSMR
| Great Smoky Mountains | 6 |
IC
| Illinois Central | 1 |
ICG
| Illinois Central Gulf | 2 |
KRL
| Kasgro Rail Lines | 3 |
KWUX
| Siemens Power Corporation | 3 |
LN
| Louisville & Nashville | 4 |
NS
| Norfolk Southern | 21 |
NW
| Norfolk & Western | 21 |
RBMN
| Reading Blue Mountain & Northern | 1 |
RFP
| Richmond Fredericksburg & Potomac | 4 |
RNCX
| North Carolina Dept Of Transportation | 2 |
SAL
| Seaboard Air Line | 5 |
SBD
| Seaboard System | 10 |
SCL
| Seaboard Coast Line | 19 |
SOU
| Southern | 36 |
SSW
| St Louis Southwestern (Cotton Belt) | 1 |
UP
| Union Pacific Railroad Company | 1 |