https://www.cnet.com/roadshow/news/self-driving-car-autonomous-explanation/

SAE International (aka the Society of Automotive Engineers), a professional association that often sets industry guidelines, stepped in to provide a helpful level-by-level guide. First published in 2014, these J3016 guidelines have become the industry standard, having been adopted by both the US Department of Transportation and the United Nations.

On the road to self-driving, autonomous cars, there are six levels of automation, according to the SAE, and each level has a specific set of requirements that a vehicle must meet before it can be considered to operate at that level.