| Apply the spring and air brakes together | |
| Apply the spring brakes gradually | |
| Apply the air brakes gradually | |
| Switch between spring and air brakes |
| Can only be air brakes | |
| Are not required | |
| Must be a combination of mechanical and air brakes | |
| Must be mechanical brakes |
| Trailer brakes | |
| Emergency and parking brakes | |
| Air brakes | |
| Cab brakes |