Definitions An autonomous drive/automated vehicle is a vehicle that drives itself. This is a very simple definition, and there are grades of autonomy. Here are the five autonomous drive levels, according to the Society for Automotive Engineers (SAE) definition. (Note that Level 0 is not autonomous at all.) Level 0 : No autonomous vehicle controls, all control by humans Level 1 : Human drivers control the critical driving tasks, may get minor technological assistance. This a