Self-driving vehicles are legal in Missouri under Senate Bill 811, which created a framework for autonomous vehicle operation on public roads.
The law requires human drivers to remain alert and ready to take control in current “self-driving” cars, while setting safety standards for future fully autonomous vehicles.
Missouri’s autonomous vehicle laws distinguish between different levels of automation, from driver-assistance features to fully driverless operation. Current vehicles with features like Tesla Autopilot still require a licensed human driver who must stay engaged and monitor the road under distracted driving laws.
If you’re involved in an accident with a self-driving car in Missouri, determining liability can be complex and may involve the human driver, vehicle owner, manufacturer, or software company.
What Is a Self-Driving Car Under Missouri Law?
A self-driving vehicle is any car equipped with autonomous technology that can perform driving tasks without human input. This means the car’s computer systems can steer, brake, accelerate, and monitor the road environment on their own.
Most vehicles on Missouri roads today are not truly self-driving. Your Tesla’s Autopilot or your car’s lane-keeping assist are driver-assistance features, not full automation. Understanding this difference is crucial if you’re ever in an accident involving these technologies.
Missouri law defines autonomous technology as hardware and software capable of performing the entire dynamic driving task. The vehicle must be able to operate without any input from a human driver. This legal definition helps determine liability when crashes occur.
SAE Levels at a Glance
The Society of Automotive Engineers created six levels to classify vehicle automation. These levels help you understand what your car can do and what responsibilities you still have as a driver.
- Level 0 (No Automation): You control everything – steering, braking, and accelerating.
- Level 1 (Driver Assistance): The car helps with either steering or speed control, but not both.
- Level 2 (Partial Automation): The car can control steering and speed together, but you must stay alert and ready to take over. Tesla Autopilot and GM Super Cruise fall into this category.
- Level 3 (Conditional Automation): The car handles most driving tasks, but you must be ready to take control when asked.
- Level 4 (High Automation): The car can drive itself in specific areas without human help.
- Level 5 (Full Automation): The car needs no human driver under any conditions.
Most “self-driving” cars you see today are Level 2. You’re still the driver and responsible for safety.
Self-Driving vs. Driverless vs Driver Assist
These terms sound similar but have important legal differences. Driver assist refers to features like adaptive cruise control that help you drive but don’t take over completely.
Self-driving usually describes Level 2 vehicles where the system handles many tasks but still requires human attention. Driverless refers to Level 4 or 5 vehicles that can operate without anyone in the driver’s seat. Knowing these distinctions matters because they affect who’s responsible if an accident happens.
Are Self-Driving Cars Legal in Missouri?
Yes, self-driving cars are legal on Missouri roads. The state passed Senate Bill 811 to create rules for vehicles with automated driving systems.
This law prepares Missouri for future transportation technology while ensuring public safety. However, different rules apply depending on the level of automation your vehicle has.
When Is a Human Driver Required?
For Level 2 vehicles like most Teslas, Missouri law requires a licensed human driver in the driver’s seat at all times. You must stay alert and be ready to take control immediately if the system fails or encounters something it can’t handle.
For future Level 4 or 5 vehicles, Missouri law would allow operation without a human driver present. These vehicles would need to meet strict safety requirements before being approved for driverless operation.
If you’re using any current “self-driving” feature, remember that you’re still legally the driver. Taking your hands off the wheel or not paying attention could make you liable for any accidents.
Insurance and Financial Responsibility
Every autonomous vehicle in Missouri must have proof of financial responsibility. This can be a regular auto insurance policy or a surety bond that meets state minimum requirements.
For fully driverless vehicles, the owner must file a statement accepting liability for damages the vehicle might cause. This shifts responsibility from an absent driver to the vehicle’s owner or operating company.
Your insurance company needs to know if you’re using self-driving features. Some policies might not cover accidents that occur while these systems are active.
Local Restrictions and Preemption
Missouri law prevents cities and counties from creating their own rules about self-driving vehicles. This means St. Louis, Kansas City, or any other municipality can’t ban autonomous vehicles that follow state law.
This statewide approach ensures consistent rules across Missouri. Local governments also can’t impose special taxes or fees on self-driving vehicles beyond what they charge regular cars.
What Rules Apply to Driverless Operation
Missouri law sets different requirements based on your vehicle’s automation level.
Safety Equipment and Compliance
Fully driverless vehicles must meet several key safety standards before operating in Missouri:
- Minimal Risk Condition Capability: The vehicle must be able to safely pull over and stop if its automated system fails.
- Traffic Law Compliance: The system must follow all Missouri traffic laws and federal motor vehicle safety standards.
- Cybersecurity Protection: The vehicle must have safeguards against hacking and unauthorized access.
- Data Recording Systems: An event data recorder must log the vehicle’s actions before and during any incident.
These requirements help ensure driverless vehicles are as safe as human drivers. The technology must prove it can handle unexpected situations before being approved for public roads.
Pilot and Commercial Use Rules
Missouri allows companies to operate self-driving vehicles for commercial purposes like robotaxis or delivery services. These companies must register with the state and prove they have adequate insurance coverage.
Commercial operators must also provide law enforcement with detailed instructions for interacting with their vehicles. This includes how to stop the vehicle safely and access its data after an accident.
Companies testing autonomous vehicles must notify the state about their operations. They’re also required to report any accidents or system failures that occur during testing.
Who Is Liable after a Self-Driving Car Crash
Someone is always responsible for damages after a car accident in Missouri. Self-driving technology doesn’t eliminate liability, it just makes determining fault more complex.
Depending on the circumstances, liability could fall on one or several parties, including the human driver, vehicle owner, manufacturer, or the company that developed the autonomous software. The specific circumstances of your accident will determine which parties bear responsibility.
Driver and Owner Liability
In Level 2 vehicle accidents, the human driver typically remains liable because they’re required to monitor the vehicle and be ready to take control, and failing to do so may help prove distracted driving caused the crash.
For future fully driverless vehicles, Missouri law shifts liability to the vehicle’s owner or the company operating the automated system. This reflects the absence of a human driver who could otherwise be held accountable.
If you own a self-driving vehicle, your insurance policy and personal assets could be at risk if the vehicle causes an accident. Make sure you understand your coverage limits before using autonomous features.
Manufacturer and Software Claims
Vehicle manufacturers or software companies might be liable if their technology causes an accident. This could happen if a sensor fails, the software makes a critical error, or the system doesn’t perform as advertised.
Proving manufacturer liability requires showing that the technology was defective and directly caused your accident. These cases often need expert testimony about how the system should have worked versus what actually happened.
Product liability claims against manufacturers can be complex and expensive to pursue. You’ll need an experienced attorney who understands both Missouri law and autonomous vehicle technology.
Missouri Comparative Fault
Missouri follows a “pure comparative fault” system under state law Section 537.765. This means you can still recover compensation even if you were partially responsible for an accident. Your compensation gets reduced by your percentage of fault.
If you’re found 30% responsible for a $100,000 accident, you’d receive $70,000. This system applies to self-driving vehicle accidents too. If you were texting while your car’s Autopilot was active and an accident occurred, you might share fault with other parties.
What Steps Should You Take after a Crash with a Self-Driving Vehicle
Take the same immediate safety steps as any car accident, but pay special attention to preserving electronic evidence from the autonomous vehicle. This data could be crucial for proving what really happened.
Act quickly because vehicle data might be automatically deleted or overwritten within days of an accident.
Steps to Protect Your Health and Claim
Your safety comes first after any accident. Follow these steps to protect both your health and your legal rights:
- Check for injuries and call 911 – Get medical help even if you feel fine initially.
- Document the vehicle’s mode – Ask the other driver if their car was in self-driving mode and try to photograph the dashboard display. This information will be important when you report a car accident to police.
- Gather standard accident information – Exchange insurance information, take photos of damage, and get witness contact details.
- Tell police about autonomous features – Make sure the responding officer notes any self-driving technology in their report.
- Avoid discussing fault – Don’t admit responsibility or speculate about what the vehicle’s computer was doing.
Don’t let the other driver or their insurance company pressure you into a quick settlement. Self-driving vehicle accidents often involve complex liability issues that take time to investigate properly.
Preserve Vehicle Data and Video
Self-driving vehicles record massive amounts of data through sensors, cameras, and computer logs. This information shows vehicle speed, braking patterns, steering inputs, and whether the human driver was paying attention.
Many vehicles also have multiple cameras that record what’s happening around the car. This footage can be invaluable evidence but might only be stored for a short time.
Contact an experienced attorney immediately to send preservation letters to the vehicle owner, manufacturer, and insurance companies. These legal notices require them to save all electronic evidence related to your accident, including phone records that may show whether the human driver was paying attention.
What Compensation Can You Recover in Missouri
Being injured in a self-driving vehicle accident doesn’t limit your right to full compensation. Missouri law allows you to recover damages for all the ways the crash has affected your life.
The key is proving who was responsible and documenting all your losses. Self-driving vehicle cases might involve multiple liable parties, potentially increasing your total recovery.
Economic and Non-Economic Damages
Missouri law divides compensation into two main categories:
Economic Damages cover your financial losses:
- Medical expenses: Hospital bills, surgery costs, rehabilitation, and future medical care
- Lost income: Wages you’ve missed and reduced future earning ability
- Property damage: Repairs or replacement of your vehicle and personal items
Non-Economic Damages compensate for personal suffering:
- Pain and suffering: Physical discomfort and emotional distress from your injuries
- Loss of enjoyment: Activities you can no longer participate in due to your injuries
- Permanent impairment: Lasting disabilities or disfigurement from the accident
Self-driving vehicle accidents can result in significant damages, particularly when a technology failure contributes to a high-speed collision. If multiple parties share liability, your total compensation might be higher than in typical car accidents.
Deadlines to File in Missouri
Missouri gives you five years from your accident date to file a personal injury lawsuit under the statute of limitations. While this seems like plenty of time, self-driving vehicle cases require immediate action to preserve electronic evidence.
Vehicle data might be automatically deleted within days or weeks of an accident. Waiting too long could mean losing crucial evidence that proves the autonomous system malfunctioned.
Some cases involving government entities have much shorter deadlines. If a city’s traffic signal system interacted poorly with a self-driving car, you might have only 90 days to file a claim.
Injured in an Accident With a Driverless Car? Contact Our Missouri Auto Accident Attorneys
Accidents involving self-driving cars can be overwhelming and confusing. Determining fault requires understanding both Missouri traffic laws and complex vehicle technology.
At Beck & Beck Missouri Car Accident Lawyers, we focus exclusively on Missouri auto accident law. We understand how these new technologies affect liability and compensation in injury cases.
For decades, our family firm has helped accident victims across Missouri obtain meaningful compensation. We work with technology experts to analyze vehicle data, investigate system failures, and build strong cases for our clients.
We handle every aspect of your claim while you focus on recovery. Our team knows how to preserve crucial electronic evidence and fight insurance companies that try to blame human drivers for technology failures.
You don’t pay our Missouri auto accident attorneys unless we win your case. We’re available 24/7 to answer your questions and provide the personal attention you deserve during this difficult time.
Frequently Asked Questions
Are Driverless Cars Operating in Missouri Cities?
Not yet for public use. While Missouri law permits fully autonomous vehicles, and companies such as Waymo began manually testing their driverless taxis in St. Louis in December 2025, there are no commercial robotaxi services that have officially launched in Missouri cities. Most self-driving cars you see still require human drivers.
Do Missouri Laws Require a Safety Driver in Some Scenarios?
Yes, all current self-driving vehicles (Level 2 and 3) must have a licensed human driver ready to take control immediately. Only certified Level 4 or 5 vehicles can operate without human drivers, and none are commercially available yet.
Can I Sue Both the Driver and the Manufacturer?
Yes, you can file claims against multiple parties if they each contributed to your accident. The human driver might be liable for not monitoring the vehicle properly while the manufacturer could be responsible for system defects.
How Do We Preserve Logs, Video and EDR Data?
Your attorney must immediately send legal preservation letters to the vehicle owner, manufacturer, and insurance companies. These notices legally require them to save all electronic data, video recordings, and event data recorder information.
Does State Law Preempt City Bans on Self-Driving Cars?
Yes, Missouri Senate Bill 811 prevents local governments from creating special regulations, taxes, or bans on autonomous vehicles that comply with state law. This ensures uniform rules throughout Missouri.
Which Insurance Pays First after an AV Crash?
The at-fault party’s insurance pays first under Missouri’s fault-based system, since Missouri is an at-fault state. This could be the human driver’s policy, the vehicle owner’s coverage, or a commercial operator’s insurance depending on who caused the accident.
