You read the term Level 4 autonomy like you are supposed to know what it means. It’s OK if you don’t. Here’s a primer on the levels of autonomous vehicles.
SAE International, formerly the Society of Automotive Engineers, sets engineering standards for numerous industries. It lists six categories of autonomous operation, which the National Highway Traffic Safety Administration supports.
Level 0 – No automation. The driver does everything.
Level 1 – Driver assistance .The vehicle may have some...