AMTK
| Amtrak | 2 |
ATSF
| Atchison Topeka & Santa Fe | 4 |
CRIP
| Chicago Rock Island & Pacific | 6 |
CS
| Colorado & Southern | 2 |
CV
| Central Vermont | 2 |
DOTX
| USDOT/Federal Railroad Administration | 1 |
DRGW
| Denver & Rio Grande Western | 5 |
FWD
| Fort Worth & Denver | 2 |
KCS
| Kansas City Southern | 3 |
MKT
| Missouri-Kansas-Texas | 4 |
PPL
| PPL | 1 |
SLSF
| Saint Louis-San Francisco | 2 |
SP
| Southern Pacific | 2 |
TSSX
| U.S. Dept. of Energy Albuquerque Operations Office | 8 |