The term autonomous vehicles describes vehicles that can monitor the road and surroundings and drive for all or part of a trip without human supervision. They also can be called self-driving vehicles. #APStyleChat (1/4)

The term driverless should not be used unless there is no human backup driver. As of now, there are no autonomous vehicles for sale to the public, although many are being tested on public roads. #APStyleChat (2/4)

Some vehicles have driver-assist systems that can perform tasks such as changing lanes, driving at low speeds, or keeping a safe distance from vehicles ahead of them, but they still need human supervision. These should be referred to as partially automated. #APStyleChat (3/4)

Avoid the term semi-autonomous because it implies that these systems can drive themselves. At present, human drivers must be ready to intervene at any time. #APStyleChat (4/4)