ATS
| ATS | 2 |
BRP
| BRP | 1 |
CSX
| CSX Railroad | 1 |
HLMX
| Helm Financial Corporation | 1 |
MP
| Missouri Pacific | 10 |
RGAX
| RGAX | 9 |
SDAG
| SDAG | 4 |
SP
| Southern Pacific | 3 |
SPAX
| Southeastern Pennsylvania Transportation (SEPTA) | 2 |
SPMW
| Southern Pacific Maintenance of Way | 12 |
UP
| Union Pacific Railroad Company | 44 |