Understanding the Six Levels of Autonomous Driving (SAE J3016)

Researchers Predict: By 2025 about 8 million driverless or semi‑driverless cars will be on the road, but they must first pass six autonomous driving levels under specific constraints such as geofencing.

These levels are defined by the Society of Automotive Engineers (SAE) and have been adopted by the U.S. Department of Transportation.

Level 0 (No Automation)

Most vehicles today are level 0, meaning they are fully manually controlled. Driver‑assistance systems like emergency braking exist, but they do not actively drive the vehicle.

Level 1 (Driver Assistance)

At this lowest automation level, the vehicle provides a single assistance function such as steering or acceleration (e.g., adaptive cruise control). The driver must monitor all other aspects of driving.

Level 2 (Partial Automation)

Advanced driver‑assistance systems (ADAS) can control steering and speed simultaneously, but a driver must remain seated and ready to take over. Tesla Autopilot and GM’s Super Cruise are examples.

Level 3 (Conditional Automation)

Vehicles can monitor the environment and make decisions like accelerating in traffic jams, but a human driver must stay alert and intervene when the system requests.

For example, Audi announced the A8L with Traffic Jam Pilot technology, qualifying as a production‑grade level 3 vehicle in Europe, though it is classified as level 2 in the United States.

Level 4 (High Automation)

Level 4 cars can operate without driver input in most situations and can intervene if a failure occurs, but they are typically limited to geofenced areas and lower speeds (≈30 mph). They are mainly used for shared‑mobility services.

NAVYA – French company offering 4‑level electric shuttles in the U.S.

Waymo – Operating driverless taxis in Arizona with no safety driver on board.

Magna’s MAX4 – Provides 4‑level kits for converting conventional cars, partnered with Lyft.

Volvo and Baidu – Jointly developing 4‑level electric vehicles for China’s autonomous‑taxi market.

Level 5 (Full Automation)

Level 5 vehicles require no human attention, lack steering wheels and pedals, and can operate anywhere without geofencing. They are currently being tested in pilot zones worldwide but are not yet commercially available.

Source: Comprehensive Guide to the Six Autonomous Driving Levels