Self-driving cars are legal in much of the United States, but whether a specific vehicle can operate in a specific place depends on two things: how automated the car actually is, and which state it’s driving in. At least 29 states and Washington, D.C. have passed laws addressing autonomous vehicles, and commercial robotaxis carry paying passengers in several major cities. There is no comprehensive federal law that ties this all together, so a car that drives itself legally in one state may be restricted or outright prohibited across the border.1NCSL. Autonomous Vehicles – Self-Driving Vehicles Enacted Legislation
Automation Level Decides What’s Legal
Every legal framework in this space runs on the SAE International classification system, which sorts driving automation into six levels from 0 (none) to 5 (full). The label matters because responsibility changes with the level.
Levels 1 and 2 are officially called “Driver Support Systems.” Adaptive cruise control is a Level 1 feature. Tesla Autopilot and GM’s Super Cruise are Level 2. However capable those systems feel, the human is legally the driver and must stay engaged. Level 2 vehicles are legal to buy and drive everywhere in the country.
The legal shift starts at Level 3, where the vehicle handles all driving under specific conditions and the driver no longer has to watch the road constantly, though the system can demand a takeover. Level 4 vehicles drive themselves within a defined area or set of conditions and can pull over safely on their own if something fails, without any human in the loop. Level 5 would match a human driver in any situation and could theoretically ship without a steering wheel or pedals. No Level 5 vehicle is commercially available.
The higher you go, the more legal responsibility moves from the person in the seat to the company that built or deployed the vehicle. That shift is where most of the complexity lives.
State Laws Vary Widely
State legislation is what actually determines whether a self-driving vehicle can operate on a given road. Governors in roughly a dozen additional states have issued executive orders creating testing or deployment frameworks on top of the 29 states plus D.C. that have passed statutes.1NCSL. Autonomous Vehicles – Self-Driving Vehicles Enacted Legislation
What those laws allow falls into rough categories:
- Some states permit both testing and commercial operation of highly automated vehicles, with reporting requirements for manufacturers. Several allow Level 4 and Level 5 vehicles to operate with no licensed human in the vehicle, provided the vehicle can follow traffic laws and safely stop itself if the system fails.
- Others permit autonomous vehicles only for testing, and often require a human safety operator behind the wheel and limit where and when testing can occur.
- A number of states have no autonomous vehicle statutes at all, leaving operators to work within existing motor vehicle codes that never contemplated a car without a driver.
A robotaxi legally picking up passengers on one side of a state line may be barred from even testing on the other side. No state requires a special driver’s license endorsement to operate an autonomous vehicle, though a few legislatures have proposed creating one.
Where You Can Actually Ride in One
The practical question for most people isn’t the statutory landscape but whether a self-driving car will show up when they open an app. As of late 2025, Waymo operates commercial robotaxi services in Phoenix, San Francisco, Los Angeles, Austin, and Atlanta, with announced expansions into Miami, Dallas, Houston, San Antonio, and Orlando.2Waymo. Safe, Routine, Ready: Autonomous Driving in Five New Cities These are Level 4 vehicles operating within defined geographic boundaries, with no human safety driver on board. Other companies test autonomous vehicles in various cities, but Waymo’s service is currently the largest commercial operation open to the public.
Reaching that point in each city took years: state legislation authorizing deployment, municipal permits, insurance filings, and ongoing data reporting to regulators. The legal infrastructure takes as long to build as the technology.
Can You Own a Self-Driving Car?
Nearly every self-driving vehicle on public roads today belongs to a commercial fleet rather than an individual owner, but the legal question is more open than many people assume. In most states that authorize Level 4 and Level 5 deployment, the laws don’t restrict ownership to commercial operators. A handful of states draw sharper lines, limiting the no-driver-required exception to commercial motor vehicles and effectively preventing individuals from running fully driverless personal vehicles. Others set different insurance thresholds depending on whether the vehicle is privately or commercially owned.
For now the point is academic. No manufacturer sells a Level 4 or Level 5 vehicle to individual consumers. What you can buy is a Level 2 car with advanced driver-assistance features, and those are legal everywhere. The commercial-versus-private distinction will matter more once genuine self-driving cars go on sale to the public rather than being deployed in managed fleets.
The Federal Role
The National Highway Traffic Safety Administration is the primary federal agency overseeing vehicle safety. Under federal law, the Secretary of Transportation prescribes Federal Motor Vehicle Safety Standards that every vehicle sold in the United States must meet, and those standards must be “practicable” and “stated in objective terms.”3Office of the Law Revision Counsel. 49 U.S. Code 30111 – Standards Federal jurisdiction covers how vehicles are designed and built. States handle the operational side: licensing, registration, insurance, and traffic enforcement.4National Highway Traffic Safety Administration. Automated Vehicle Safety
The problem is that existing federal safety standards were written for vehicles with human drivers. Requirements for steering wheels, brake pedals, rearview mirrors, and windshield wipers assume someone is behind the wheel. A driverless vehicle may not need any of that, but it also can’t be sold if it doesn’t comply with the standards as written. Manufacturers that want to deploy vehicles without manual controls before the standards are rewritten can apply for a temporary exemption under federal law, which lets the Secretary of Transportation exempt vehicles to help develop or evaluate new safety features providing protection at least equal to the current standard.5Office of the Law Revision Counsel. 49 USC 30113 – General Exemptions
The biggest gap in the framework is that Congress has never enacted a comprehensive federal autonomous vehicle law. The SELF DRIVE Act was reintroduced in the 119th Congress in 2025 to set federal rules for the design and performance of vehicles with automated driving systems.6Congress.gov. H.R.7390 – SELF DRIVE Act of 2025 Earlier versions passed the House in 2017 but stalled in the Senate. NHTSA has said it wants to prevent a “harmful patchwork of state laws,” but until Congress acts, that patchwork is what governs day-to-day operation.7National Highway Traffic Safety Administration. Report to Congress on Research and Rulemaking for Automated Driving Systems
Who Is Liable When a Self-Driving Car Crashes
In a conventional crash, fault usually turns on driver negligence. Autonomous vehicles complicate that because the “driver” may be software built by a corporation.
Product Liability Takes Over at Higher Levels
When an automated system is in control and causes a crash, liability shifts from driver negligence toward product liability. The question becomes whether the vehicle’s design, software, or a sensor component was defective, and the answer can reach the manufacturer, the software developer, or a parts supplier.
In August 2025, a federal jury found Tesla partially liable for a 2019 crash that happened while a vehicle was in Autopilot mode. Neither the driver nor the Autopilot software braked at an intersection with a stop sign, killing one pedestrian and injuring another. The jury awarded $43 million for pain and suffering plus $200 million in punitive damages. Courts, in other words, are willing to hold manufacturers directly responsible when automation fails. The typical legal standard asks whether a safer alternative design was available at the time the vehicle was produced.
Mercedes-Benz has taken a different approach with its Level 3 Drive Pilot system, publicly accepting liability for crashes caused by technological malfunctions while Drive Pilot is engaged. The company acknowledges that when the car is driving at Level 3, it bears legal responsibility rather than the person in the seat.
Drivers Still Own the Risk at Level 2 and Below
At Level 2 and below, the human remains legally in charge. These are driver-support systems, and ignoring the road or falling asleep while they’re engaged does not transfer fault to the manufacturer. A driver who turns on Autopilot and stops paying attention still bears liability for what happens next. NHTSA has opened investigations into Tesla’s Full Self-Driving software covering millions of vehicles over concerns about dangerous maneuvers, including running traffic signals and behaving improperly at railroad crossings, but those investigations look at whether the product is defective, not at whether drivers can disengage from driving.
Insurance Requirements Are Higher for Autonomous Fleets
States set their own insurance rules for autonomous vehicles, and the numbers generally exceed what a conventional car needs. Testing permits in many states require proof of financial responsibility ranging from $1 million to $5 million in liability coverage. For commercially deployed vehicles, some states use tiered minimums that scale with the automation level and with whether the vehicle is privately or commercially owned, and commercial autonomous vehicles commonly face minimums of $1 million or higher.
If you’re buying a personal car with Level 2 features like adaptive cruise control and lane-keeping assist, your standard auto policy covers you. The elevated requirements apply mainly to companies running Level 4 vehicles without a human driver.
How Police Handle a Car With No Driver
Stopping a vehicle with nobody at the wheel is a genuinely new problem, and procedures are still catching up. Departments generally identify the vehicle as autonomous, contact the operating company’s remote operator, and confirm the vehicle won’t move before anyone approaches. Officers typically use loudspeakers to communicate with any passengers.
For traffic violations committed by a Level 4 or Level 5 vehicle operating without a human driver, the citation goes to the company operating the vehicle. If an officer decides continued operation would endanger the public, they can ask the remote operator to take the vehicle out of service. Otherwise the operator is informed of the citation and the vehicle goes on its way. Open questions remain about exactly who to name on a citation and how to serve legal process on a corporation during a roadside encounter, because most state traffic codes were written on the assumption that a human driver would be present to hand over a license.