For self-driving cars there are different levels of capability. I'll provide a link to two shorter articles first, then quote from the National Highway Traffic Safety Administration (NHTSA), a part of the U.S. Department of Transportation.
The following article describes six levels of autonomy, and also provides some reasons why higher levels of autonomy aren't available in the mainstream yet.
$1The article concludes with a section entitled "So…dude, where’s my autonomous car?"
The following article presents some of the same info:
$1And here's the NHTSA description of the levels of autonomy:
>Level 0: The human driver does all the driving.
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>Level 1: An advanced driver assistance system (ADAS) on the vehicle can sometimes assist the human driver with either steering or braking/accelerating, but not both simultaneously.
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>Level 2: An advanced driver assistance system (ADAS) on the vehicle can itself actually control both steering and braking/accelerating simultaneously under some circumstances. The human driver must continue to pay full attention (“monitor the driving environment”) at all times and perform the rest of the driving task.
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>Level 3: An automated driving system (ADS) on the vehicle can itself perform all aspects of the driving task under some circumstances. In those circumstances, the human driver must be ready to take back control at any time when the ADS requests the human driver to do so. In all other circumstances, the human driver performs the driving task.
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>Level 4: An automated driving system (ADS) on the vehicle can itself perform all driving tasks and monitor the driving environment – essentially, do all the driving – in certain circumstances. The human need not pay attention in those circumstances.
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>Level 5: An automated driving system (ADS) on the vehicle can do all the driving in all circumstances. The human occupants are just passengers and need never be involved in driving.
That long quote is from this article:
$1 For anything less than full automation at Level 5 the driver would have to be qualified to drive.
The few Level 5 fully automated vehicles that I've read about tend to move more slowly and be engaged in tasks that aren't critical to safety, such as transporting goods rather than people.