Unlike many technical markets, such as the lidar and laser scanning industry there is good news when it comes to a standard for describing levels of driving automation. The consumer markets have learned that developing and agreeing on standards, especially in emerging industries will benefit all parties and lead to increased productivity.
The standard in question is SAE J3016 (https://www.sae.org/misc/pdfs/automated_driving.pdf). SAE International is an automotive organization that promulgates standards for the automotive industry and more. You may have seen it when purchasing automotive oil.
The J3016 standard creates a taxonomy and definitions for terms related to on-road motor Vehicle Automated Driving Systems.
The levels are:
Level 0 – No Automation
Level 1 – Driver Assistance
Level 2 – Partial Automation
Level 3 – Conditional Automation
Level 4 – High Automation
Level 5 – Full Automation
In the first three levels a human has primary responsibility. In the last three the computer is in charge. Can you imagine this industry without standards?