ABFZ
| Arkansas Best Freight | 3 |
ALLZ
| Alliance Shippers Incorporated | 7 |
BOZ
| Baltimore & Ohio | 2 |
CRZ
| Conrail Trailer | 6 |
CSXZ
| CSX Transportation Incorporated | 1 |
DTCV
| DTCV | 1 |
DTCZ
| DTCZ | 1 |
FEDZ
| Federal Express | 2 |
MECZ
| MECZ | 2 |
MEQZ
| MEQZ | 3 |
PRIZ
| PRIZ | 5 |
RJMZ
| RJMZ | 1 |
TDIZ
| Thoroughbred Direct | 1 |
UPGZ
| UPGZ | 1 |
WARZ
| White Arrow | 3 |
WERZ
| Werner Enterprises Incorporated | 1 |
XTRZ
| XTRA Intermodal | 1 |