Autonomous means independent or self-governing. In the automotive industry, an autonomous vehicle is capable of safe operation under standard rules of travel without human intervention. See also, SAE J3016, Level 1 Autonomous, Level 2 Autonomous, Level 3 Autonomous, Level 4 Autonomous, and Level 5 Autonomous.
Autonomous driving technology is still developing. Before purchasing an autonomous vehicle, you should compare insurance coverages and costs to those of conventional automobiles.