ALAB
| Alabama Railroad | 1 |
AOK
| Arkansas-Oklahoma Railroad | 11 |
BNSF
| BNSF Railway | 21 |
CAGY
| Columbus & Greenville Railway | 6 |
KCS
| Kansas City Southern | 2 |
MNNR
| Minnesota Commercial | 3 |
NS
| Norfolk Southern | 2 |
NW
| Norfolk & Western | 3 |
SOU
| Southern | 8 |
SP
| Southern Pacific | 25 |
UP
| Union Pacific Railroad Company | 3 |
WRWK
| Providence & Worchester Railroad | 10 |