Daimler, Waymo, and GM Make Big Gains in Level 4 Self-Driving

The Society for Automotive Engineering (SAE) has identified five levels of self-driving which describe how much a particular vehicle is able to handle its own driving tasks. Level 1 means that the vehicle handles either the speed or the steering, but not both, and it requires supervision. While ordinary cruise control technically falls into this level, most people associate cruise control with adaptive cruise control, which slows down or speeds up with traffic. A Level 2 car can control the speed and the steering but the driver must still maintain full vigilance. At Level 3, the driver need not maintain total vigilance but must still be able to take control upon request.