| 1 | Package Express |
| 2 | Groups |
| A | Bus |
| B | Truck |
| C | Truck - Rail - Truck |
| D | Applies to deregulated (US ICC) carload rail, other than piggyback |
| E | Rail |
| F | Rail Trailer on Flat Car/Container on Flat Car (TOFC/COFC) Door-to-Door |
| G | Rail Trailer on Flat Car/Container on Flat Car (TOFC/COFC) Plan 3 |
| H | Rail Trailer on Flat Car/Container on Flat Car (TOFC/COFC) Plan 4 |
| I | Applies to regulated intermodal traffic |
| J | Air Freight |
| K | Air Freight Forwarder |
| L | Air Taxi |
| M | Multimodal |
| N | Surface Freight Forwarder |
| O | Water |
| P | Applied To Deregulated (US ICC) Piggyback |
| Q | Shipper Agent |
| R | Applies to regulated carload rail other than piggyback. |
| S | Driveaway Service |
| T | Towaway Service |
| U | Driveaway and Towaway Service |
| V | Water/Pipeline Intermodal Movements |
| W | Shipper Agent (Truck/Rail/Truck) |
| Y | Pipeline |
| Z | Shipper Association |