Converging AI and Human Roles
Transport & Field

SAE Driving Levels, Explained: What Each Level Leaves to the Human Driver (2026 Edition)

SAE International revised its J3016 driving-automation levels on September 20, 2026, rewording all six. Here is what each level hands to the system, what stays with the human driver, and which deployed system shows it, graded by its evidence.

Checked against SAE J3016_202609 (revised September 20, 2026), quoting only its public abstract

Who was responsible for driving, per NHTSA crash reports
Level 2 ADAS · consumer driver2,143
ADS · no one1,215
ADS · operator in vehicle204
ADS · in-vehicle and remote12
ADS · remote only5
NHTSA Standing General Order 2021-01 incident report files, data release of Sep 15, 2026 (reports received Jun 16, 2025 to Aug 17, 2026); latest version of each report, counted by MetaRoles. Report counts, not crash rates.
Chart: crash reports filed with NHTSA under its Standing General Order, by who the reporting company said was responsible for driving. Level 2 driver-assistance reports and ADS (Level 3–5) reports are separate files; NHTSA says the data are not normalized and one crash can have several reports, so these are not rates.

Role scorecard

Shuttle Drivers and Chauffeurs SOC 53-3053.00

We use O*NET's Shuttle Drivers and Chauffeurs, which covers driving company cars and privately owned vehicles for passengers, as the closest general passenger-driving role with rated core tasks; O*NET's Taxi Drivers profile (53-3054.00) lists its tasks without core ratings.1

  • Core tasks AI does in production3 of 6
  • Most mature evidenceIn production
  • Cost€5,950 Level 3 option on an S-Class (Mercedes price, per heise)2
  • Benefit95% fewer serious-injury crashes than a human benchmark (Waymo-stated)3

As of · Tasks: O*NET 31.01

Core tasks of Shuttle Drivers and Chauffeurs and what driving automation does in each, as of 2026-10-13
Core task (O*NET) What AI or robots do Extent Evidence grade Example case Source
Drive shuttle busses, limousines, company cars, or privately owned vehicles to transport passengers. A Level 4 automated driving system carries public riders with no one in the driver's seat, inside its service areas. Does it In production Waymo ride-hailing, 271.3M rider-only miles through June 2026 (company-stated) 3, 4
Comply with traffic regulations to operate vehicles in a safe and courteous manner. In autonomous mode the system is responsible for its own driving, traffic rules included; Waymo says it does not drive its cars remotely. Does it In production Waymo Driver in rider-only service (at Level 2 the human stays responsible for traffic law) 5
Pick up or meet passengers according to requests, appointments, or schedules. Riders hail a car in an app, 24 hours a day; the car drives itself to the pickup and drop-off. Does it In production Waymo app in 13 US metro areas, plus Austin and Atlanta through Uber 4
Follow relevant safety regulations and state laws governing vehicle operation, and ensure that passengers follow safety regulations. The vehicle won't start a ride until riders buckle up and flags an unbuckled belt mid-ride; company staff then remind the rider and may end the trip. Assists In production Zoox purpose-built robotaxi rider service (Zoox rider manual) 6
Operate vehicles with specialized equipment, such as wheelchair lifts, to transport and secure passengers with special needs. The automated vehicle drives; an onboard human operator deploys the rear ramp, attaches the wheelchair securement straps and helps with seatbelts. Assists In production May Mobility wheelchair-accessible Toyota Sienna service, as described by May Mobility in 2023 7
Check the condition of a vehicle's tires, brakes, windshield wipers, lights, oil, fuel, water, and safety equipment to ensure that everything is in working order. Fleet technicians do these checks; Waymo is hiring to automate depot "maintenance checks" and sensor calibration with robotics. Not yet Vendor claim Waymo depot-automation job listing, July 2026 (a stated goal, not a deployment) 8, 9

Extent and grade follow our evidence grades: "Does it" needs a production case where AI performs the task on its own; "Assists" means AI helps a person do it; "Not yet" means only prototypes, vendor claims or nothing. The three "Does it" rows are true only for Level 4 service inside its operating areas; at Levels 1 to 3 a human remains the driver or the fallback (see the table below). We left out tasks such as fares, dispatcher calls and reports, which are handled by software and staff rather than by the driving system.

Costs and benefits

Drive Pilot (Level 3) option price, Germany€5,950 on the S-Class; €8,842 on the EQS, where it is bundled with a driver-assistance package (Mercedes-Benz prices, reported by heise, December 2024)2
Upgrade from 60 to 95 km/hFree for cars already equipped, by workshop or over-the-air update (Mercedes-Benz, reported by heise)2
Crashes versus a human benchmark95% fewer serious-injury-or-worse crashes and 82% fewer injury-causing crashes than an average human driver over the same distance in its cities (Waymo-stated; Waymo's own analysis of rider-only miles through June 2026)3

Seen at work

A rider-only Waymo trip in San Francisco, with no one in the driver's seat (Level 4). Video: Waymo (operator and developer).
Drive Pilot (Level 3) in use on a German Autobahn. Video: Mercedes-Benz (vendor video).
How a wheelchair user boards a May Mobility automated vehicle, with an onboard operator handling the ramp. Video: May Mobility (operator and developer).

As of · Descriptors: SAE J3016_202609 abstract10

The six SAE J3016 levels of driving automation, who does what at each, and a deployed example, as of 2026-10-13
Level SAE 2026 descriptor (abstract) Who drives Who watches the road Who takes over if it fails Deployed example Evidence grade Source
Level 02021 name: No Driving Automation "No driving automation" Human Human Human None by definition; automatic emergency braking and lane keeping assistance sit outside the taxonomy as momentary interventions Not applicable 10, 11
Level 12021 name: Driver Assistance "Driver support for steering OR speed, with continual driver supervision necessary and driver intervention when needed" Human, with the system on steering or speed Human Human Adaptive cruise control, SAE's own Level 1 example; Cadillac lists it as part of its Super Cruise package In production 10, 12
Level 22021 name: Partial Driving Automation "Driver support for steering AND speed, with continual driver supervision necessary and driver intervention when needed" Human, supervising system steering and speed Human Human Tesla FSD (Supervised), which Tesla characterizes as Level 2; GM's Super Cruise ("hands off the wheel, eyes on the road") In production 13, 12
Level 32021 name: Conditional Driving Automation "Automated driving under defined conditions, with human driving needed following an alert or evident vehicle malfunction" System, within its conditions System, while engaged Human, after an alert Mercedes-Benz Drive Pilot: California permit 2023 (up to 40 mph), German approval to 95 km/h 2024 (earlier S-Class and EQS); not offered on the 2026 S-Class facelift in the US In production 14, 15, 16
Level 42021 name: High Driving Automation "Automated driving under defined conditions, with human driving not needed to mitigate risk" System, within its conditions System System Waymo rider-only ride-hailing; Zoox purpose-built robotaxi in Las Vegas In production 3, 6
Level 52021 name: Full Driving Automation "Automated driving under all conditions in which humans can drive, with human driving not needed" System, everywhere a human could drive System System None found in the regulator and operator sources reviewed for this post Not applicable 10

Descriptors are quoted from the public abstract of SAE J3016_202609; SAE says they "are NOT the definitions of the levels", which sit in Sections 4 and 5 of the paywalled standard and aren't quoted here. The "who" columns are our plain-language reading of those descriptors and of the regulator documents cited. A level describes the feature engaged at a given moment, not the whole vehicle. Evidence grades: how they work.

How it works

What the levels classify

J3016 is a taxonomy, not a safety standard; SAE says it "is not intended to provide guidance for safe vehicle operation".10 It sorts driving automation by who performs the dynamic driving task (the DDT: the real-time steering, braking, accelerating and watching of the road) and who handles the DDT fallback when something goes wrong. It names three actors: the human user, the driving automation system and the rest of the vehicle.10 The level belongs to whichever feature is engaged at that moment, so one car can run at Level 2 on one road and Level 3 on another. Roles are defined by design, not behavior: SAE's own example is that a driver who stops watching the road while a Level 1 adaptive cruise control is on "still has the role of driver".10 Momentary safety systems such as automatic emergency braking and electronic stability control fall outside the taxonomy altogether, because they don't perform the driving task on a sustained basis.10

What changed in the September 2026 edition

SAE's On-Road Automated Driving (ORAD) Committee revised J3016 on September 20, 2026 (J3016_202609, DOI 10.4271/J3016_202609), the fifth edition after those of January 2014, September 2016, June 2018 and April 2021.10 The most visible change is in the short labels. The 2021 abstract listed six names, from "No Driving Automation" through "Partial", "Conditional" and "High" to "Full Driving Automation".11 The 2026 abstract drops those names for sentence-long descriptors that say who does what: Levels 1 and 2 are now "driver support" with "continual driver supervision necessary", and Levels 3 to 5 are "automated driving" that differ in when, if ever, human driving is needed.10 SAE says the descriptors were changed "to improve understanding of the differences among levels" and points to Sections 4 and 5 for the reasons; it also stresses that the descriptors are not the definitions.10 The edition is three weeks old as of this check, so carmakers, regulators and data files still use the 2021 names.

Levels 1 and 2: the human is still the driver

At Level 1 the system handles steering or speed; at Level 2 it handles both. Either way the human supervises continually and steps in when needed.10 The US regulator states the consequence plainly. In opening a preliminary evaluation of Tesla's FSD on October 7, 2025, NHTSA wrote that Tesla characterizes FSD as "an SAE Level 2 partial automation system requiring a fully attentive driver", and that "the driver remains fully responsible at all times for driving the vehicle, including complying with applicable traffic laws".13 That investigation, covering an estimated 2,882,566 vehicles, looks at reports of FSD performing maneuvers that broke traffic laws; it was opened as an inquiry and is not a finding.13 Hands-free systems are still Level 2: Cadillac markets Super Cruise as "hands off the wheel. Eyes on the road" and tells drivers to "always pay attention while driving".12

Level 3: the human becomes the fallback

Level 3 is the first level where the system drives and watches the road, but only "under defined conditions", and a human must take over "following an alert or evident vehicle malfunction".10 Those conditions are its operational design domain (ODD), the conditions a feature is designed to work in, which a manufacturer must identify, along with commonly occurring restricted conditions, to get a California deployment permit.14 California's DMV issued Mercedes-Benz a deployment permit for Drive Pilot on June 8, 2023, limited to designated highways, daylight and speeds up to 40 mph, excluding city streets, construction zones, heavy rain and fog; the DMV noted that at Level 3 "the driver must remain behind the wheel to take over when prompted".14 In Germany, the Federal Motor Transport Authority (KBA) extended Drive Pilot's approval to 95 km/h on highways after tests by TÜV Rheinland, announced in December 2024. Per TÜV, it needs the right-hand lane, a lead vehicle and an outside temperature above 4 °C; if it detects a problem such as roadworks, "an alarm sounds and the driver must take over the wheel immediately", and if the driver doesn't respond the car makes "a safe emergency stop".15 In 2026 Mercedes stepped back: it told WardsAuto that the facelifted 2026 S-Class in the US gets a "Level 2++" system instead of Drive Pilot, while it develops a faster Level 3 system.16 Auto motor und sport reported that the old Drive Pilot hardware had no computing headroom beyond 95 km/h.17

Level 4: no human driving needed inside the ODD

Level 4 keeps the "defined conditions" but removes the human from the fallback: "human driving not needed to mitigate risk".10 This is the robotaxi level. Waymo runs public, rider-only ride-hailing (no one in the driver's seat) around the clock and says it reached 271.3 million rider-only miles through June 2026.43 Humans haven't disappeared from the operation; they have moved off the road. When a Waymo car stops and can't continue, Support staff contact the rider and a Roadside Assistance specialist drives the car to the drop-off; Waymo says it "doesn't operate any of its cars remotely" and that in autonomous mode "the car is responsible for its own driving at all times".5 Zoox goes further on hardware: its purpose-built vehicles have no steering wheel and no pedals. NHTSA granted Zoox an exemption in late July 2026 that Smart Cities Dive called a first for paid rides in purpose-built robotaxis, and Zoox said it would start charging customers in Las Vegas the following month.18

Level 5: defined, not deployed

Level 5 is the only level without an ODD limit: automated driving "under all conditions in which humans can drive".10 Every Level 3 and Level 4 system described above is bounded by roads, areas, speeds or weather, and we found no regulator or operator describing a Level 5 deployment. The level exists in the taxonomy so that the scale has an end point.

What the crash data can and can't tell you

Under NHTSA's Standing General Order 2021-01, the companies it names report certain crashes. NHTSA publishes Level 2 driver-assistance (ADAS) reports and automated driving system (ADS, Levels 3 to 5) reports in separate files, and the reporting requirements differ between the two.19 One field records who was responsible for driving; its value "None" means "no individual is responsible for any part of the DDT at the time of the incident".19 In the September 15, 2026 release, covering reports received from June 16, 2025 to August 17, 2026, 1,215 of the ADS reports (latest version of each) list no responsible person, 204 an operator in the vehicle, 12 an in-vehicle and a remote operator and 5 a remote operator only; 2,143 of the Level 2 reports list a consumer driver.2021 These counts show who held the driving role, not how safe anyone is: NHTSA warns that the same crash may have several reports, that data may be incomplete or unverified and that "summary incident report data are not normalized".19 Safety comparisons need exposure data, such as miles driven. Waymo publishes its own, reporting 95% fewer serious-injury-or-worse crashes than a human benchmark in its cities; that is the company's analysis of its own fleet, not an independent measurement.3

What stays with the human

Read against O*NET's task list for shuttle drivers and chauffeurs, the levels move one block of work: operating the vehicle within traffic law and getting to the pickup.1 Up to Level 2 that block stays with the driver; at Level 3 the driver can look away but must be ready; only at Level 4, inside a service area, does it leave the vehicle entirely. The tasks around the driving remain largely human. May Mobility's wheelchair-accessible service relies on an onboard operator to deploy the ramp and secure the wheelchair.7 Waymo wrote in 2018 that its fleet technicians run regular maintenance checks on its self-driving systems, which it compared to pre-flight checks on planes.8 These are task descriptions, not employment forecasts: the scorecard above shows which tasks deployed systems perform, not how many driving jobs exist or will exist.

Sources

  1. O*NET OnLine (O*NET 31.0), 53-3053.00 – Shuttle Drivers and Chauffeurs: Tasks, retrieved 2026-10-13; see also 53-3054.00 – Taxi Drivers, retrieved 2026-10-13.
  2. heise autos, Autonomous driving: Mercedes is allowed to drive up to 95 km/h (Level 3), December 17, 2024.
  3. Waymo, Waymo Safety Impact (rider-only miles and human-benchmark comparisons through June 2026), retrieved 2026-10-13.
  4. Waymo, Frequently Asked Questions, retrieved 2026-10-13.
  5. Waymo Help Center, Ride interruptions (Waymo Roadside Assistance), retrieved 2026-10-13.
  6. Zoox, Rider Manual, retrieved 2026-10-13.
  7. May Mobility, How autonomous vehicles give wheelchair users more autonomy, November 30, 2023; and Move with May: Our commitment to easy, accessible transportation, February 14, 2023.
  8. Waymo, Getting ready for more early riders in Phoenix, August 2018.
  9. Built In San Francisco (Waymo job listing), Senior Staff Machine Learning Engineer, Depot Automation, posted July 18, 2026.
  10. SAE International, J3016_202609: Taxonomy and Definitions for Terms Related to Driving Automation Systems for On-Road Motor Vehicles (abstract and revision history), revised September 20, 2026.
  11. SAE International, J3016_202104: Taxonomy and Definitions for Terms Related to Driving Automation Systems for On-Road Motor Vehicles (abstract), revised April 30, 2021.
  12. Cadillac (General Motors), Super Cruise, retrieved 2026-10-13.
  13. NHTSA Office of Defects Investigation, PE25012 open resume: Traffic safety violations while Full Self Driving ("FSD") is engaged, opened October 7, 2025.
  14. California DMV, California DMV Approves Mercedes-Benz Automated Driving System for Certain Highways and Conditions, June 8, 2023.
  15. TÜV Rheinland, Mercedes-Benz receives approval for highly automated driving up to 95 km/h, December 19, 2024.
  16. WardsAuto, Mercedes-Benz shifts autonomous driving tech in 2026 S-Class, February 11, 2026.
  17. auto motor und sport, Keine Level-3-Autonomie mehr: Mercedes-S-Klasse-Facelift mit Technik-Pause (in German), January 21, 2026.
  18. Smart Cities Dive, Zoox purpose-built robotaxis get first-ever nod from NHTSA for paid rides, July 31, 2026.
  19. NHTSA, Standing General Order (SGO) 2021-01 Data Dictionary, September 15, 2026.
  20. NHTSA, SGO 2021-01 Incident Reports, ADS (CSV), data release of September 15, 2026, retrieved 2026-10-13.
  21. NHTSA, SGO 2021-01 Incident Reports, Level 2 ADAS (CSV), data release of September 15, 2026, retrieved 2026-10-13.