| Level 0 | No automation |
| Level 1 | Automated systems can sometimes assist the human in some parts of the driving task |
| Level 2 | Partially automated systems can conduct some driving tasks while human monitors and performs other driving tasks |
| Level 3 | Conditionally automated systems can conduct some driving tasks in some conditions, but the human driver must be ready to take back control |
| Level 4 | Highly automated can conduct all driving tasks in some conditions without human control |
| Level 5 | Fully automated systems can perform all driving tasks, under all conditions in which human could drive |