| The vehicle`s engine | |
| The exterior of the vehicle only | |
| Both the exterior and passenger area of the vehicle | |
| The passenger area of the vehicle only |
| Materials that the shipper can send another way | |
| Drugs | |
| Emergency hospital supplies | |
| Small-arms ammunition labeled ORM-D |
| Can be carried on a bus | |
| Require no paperwork to be carried on a bus | |
| Cannot be carried on a bus | |
| Are typically carried on a bus |