AGR
| Alabama and Gulf Coast | 1 |
AR
| Aberdeen and Rockfish | 1 |
BCLR
| Bay Colony | 1 |
BM
| Boston & Maine | 1 |
CIRR
| Chattahoochee Industrial Railroad | 5 |
CR
| Conrail | 1 |
CSX
| CSX Railroad | 8 |
DWC
| Canadian National Railways | 1 |
FBOX
| TTX Company | 2 |
GMRC
| Green Mountain RR | 1 |
GNWR
| Genesee and Wyoming Railroad Company | 1 |
GTW
| Grand Trunk Western | 1 |
HPTD
| High Point Thomasville and Denton Railroad | 4 |
IFRX
| Infinity Rail LLC | 2 |
LRS
| Laurinburg and Southern | 1 |
MEC
| Maine Central | 2 |
MRS
| Manufacturers Railway | 1 |
MSDR
| Knoxville & Holston River Railroad | 2 |
NKCR
| Nebraska, Kansas & Colorado RailNet, Inc | 1 |
NS
| Norfolk Southern | 9 |
NW
| Norfolk & Western | 3 |
RBOX
| Railbox Company | 3 |
RFP
| Richmond Fredericksburg & Potomac | 1 |
SAL
| Seaboard Air Line | 2 |
SOU
| Southern | 17 |
SRY
| Southern Railway of British Columbia Lim | 1 |
WC
| Wisconsin Central | 2 |
WGCR
| Wiregrass Central Railroad. Incorporated | 1 |
WIIX
| Williamette Industries Incorporated | 1 |
YVRR
| Yadkin Valley | 1 |