The author quotes that their predictions are for Level 4 autonomy:

The definition, or common understanding, of what self driving cars really means has changed since my post on predictions eight years ago. At that time self driving cars meant that the cars would drive themselves to wherever they were told to go with no further human control inputs. It was implicit that it meant level 4 driving. Note that there is also a higher level of autonomy, level 5, that is defined.