Autonomy Levels

L0 · L2 · L3 · L4 · L5

Almost everything sold as self-driving is Level 2. At Level 3 the manufacturer, not the driver, is responsible.

Who drives at each level: at L0 to L1 and L2 the human drives; at L3 the system drives but the human must take over on request; at L4 the system drives with no human inside its operating domain; at L5 it drives anywhere, and no L5 system exists. Liability shifts from the driver to the manufacturer between L2 and L3. WHO DRIVES AT EACH LEVEL L0-L1 Human drivesone assist L2 Human drivessteer + speed L3 System driveshuman backup L4 System drivesin its domain L5 System drivesanywhere liability shifts to the maker
Consumer systems
Mostly L2
L3 approvals
Narrow ODDs
Robotaxis
L4
L5 systems
None
Hub
Autonomy

Finding

The line that matters is between Level 2 and Level 3, where responsibility moves from the driver to the manufacturer

Under the SAE J3016 levels, a Level 2 system steers and controls speed but the driver remains responsible at every moment. At Level 3 the system is responsible while it is engaged, and the driver only has to take over when asked. Almost every system sold to consumers, including Tesla FSD (Supervised), GM Super Cruise and China's urban navigate-on-autopilot systems, is Level 2, however capable it feels.

Level 3 exists only in narrow conditions. Mercedes-Benz DRIVE PILOT was first certified in Germany in 2021 and in Nevada and California in 2023, on mapped highways, in daylight and below set speeds. China's Ministry of Industry and Information Technology (MIIT) gave the first Level 3 product approvals to Changan and BAIC models in December 2025, limited to specific roads, and said in October 2026 that a second batch is in progress. Level 4 is where robotaxis and driverless trucks operate: no human driver, but only inside a defined operational design domain (ODD) - the roads, speeds, weather and hours the system is approved for. No Level 5 system exists.

Levels

The six levels

Driving automation levels
LevelNameWho is responsibleWhat it doesExamples
L0No automationHumanWarnings onlyBlind-spot warning
L1Driver assistanceHumanSteering or speed, not bothAdaptive cruise control
L2Partial automationHuman, always responsibleSteering and speed togetherTesla FSD (Supervised), GM Super Cruise, Ford BlueCruise, Chinese urban NOA
L3Conditional automationSystem while engaged; human on requestEyes off in a narrow ODDMercedes DRIVE PILOT; Changan and BAIC (China, Dec 2025)
L4High automationSystem, inside its ODDNo driver needed in the ODDWaymo, Zoox, Baidu Apollo Go, Pony.ai, Aurora trucks, mine haul trucks
L5Full automationSystem, everywhereNo ODD limitsNone

Sources

Sources and scope

Scope
SAE J3016 driving automation levels and current approvals
Sources
SAE J3016; Mercedes-Benz; MIIT via Gasgoo and CnEVPost (December 2025, October 2026); company disclosures
Updated
October 2026