Key Points About Waymo Accidents & Liability:
• Autonomous vehicle accidents don’t automatically change Colorado accident law
• Liability is determined by applicable state law, federal law, or common law
• The presence of self-driving technology changes evidence but not automatic liability
• A thorough investigation is essential to determine who actually caused the accident
A recent Denver Waymo accident near Denver Health presents a question Colorado drivers are likely to encounter more frequently: What happens when an autonomous or driverless vehicle is involved in a car accident?
The answer is not that ordinary Colorado accident law suddenly disappears.
Colorado has specifically authorized automated driving systems under certain conditions. More importantly for an injury claim, C.R.S. 42-4-242 expressly provides that liability for a crash involving an automated driving system operating a motor vehicle without human control is determined under applicable state law, federal law, or common law.
That means the presence of a self-driving vehicle may substantially change the evidence that needs to be investigated, but it does not create an automatic rule that the autonomous vehicle company is liable whenever its vehicle is involved in a crash.
The August 27 Denver collision illustrates that distinction particularly well.
Denver Police Investigate Three-Vehicle Crash Involving Waymo
According to CBS Colorado, the August 27, 2026 collision occurred at approximately 2:36 p.m. near West 8th Avenue and Delaware Street, close to Denver Health.
Denver police said a driver traveling westbound on 8th Avenue struck another vehicle. That impact pushed the second vehicle into the rear of an unoccupied Waymo that was stopped in the travel lane.
Police described the impact involving the Waymo as a secondary collision. One driver was cited for following too closely.
The two human drivers were evaluated at the scene, and no serious injuries were initially reported.
The reporting also noted that drivers at the scene questioned why the Waymo was stopped in the travel lane.
That question may be relevant to understanding the circumstances, but it does not establish civil liability. Police characterized the Waymo contact as secondary, and the presently available information does not establish that the Waymo caused the initial collision.
Original reporting: CBS Colorado, “Denver drivers question Waymo behavior after chain-reaction crash.”
Colorado Already Has a Law Governing Automated Driving Systems
Colorado did not wait for driverless vehicles to become commonplace before addressing them.
C.R.S. 42-4-242 governs automated driving systems.
The statute permits an automated driving system to drive or control a motor vehicle if the system is capable of complying with the applicable state and federal laws governing the function it is operating.
Colorado law also recognizes higher levels of automation in which the automated driving system performs the driving task without human supervision.
The Colorado Department of Transportation explains that Level 4 and Level 5 automated driving systems may operate in Colorado, with or without a human driver, when they can comply with applicable state and federal laws.
That makes Colorado an important emerging market for autonomous vehicles.
What Does Colorado Law Say About Liability for a Driverless Car Accident?
One provision of C.R.S. 42-4-242 is especially important for personal injury claims.
Subsection (5) provides that liability for a crash involving an automated driving system driving a vehicle that is not under human control is determined according to applicable state law, federal law, or common law.
In practical terms, Colorado did not create a separate rule automatically making the technology company liable for every autonomous vehicle crash.
Nor did the statute immunize an autonomous vehicle operator, owner, manufacturer, or other responsible entity from ordinary liability principles.
The actual cause of the collision still matters.
A civil investigation may therefore involve ordinary negligence principles, Colorado traffic laws, product liability principles where supported by the evidence, agency or ownership issues, insurance coverage, and other applicable law.
Is a Waymo Automatically Liable Because It Stopped in a Travel Lane?
No.
The fact that a Waymo was stopped in a travel lane may reasonably raise questions about why it stopped and what information its automated driving system was processing at the time.
Those questions deserve investigation.
But they should not be converted into assumptions about liability.
According to Denver police, the August 27 collision began when one human-operated vehicle struck another vehicle. The second vehicle was then pushed into the Waymo.
That makes the Waymo collision a secondary impact based on the currently reported facts.
Whether the Waymo’s position contributed in any legally significant way would require considerably more evidence.
An attorney should want to know why the vehicle stopped, how long it had been stopped, what traffic conditions existed, whether its warning systems were activated, whether preceding drivers had adequate notice, and what the automated system detected immediately before the collision.
Those facts cannot be determined merely by looking at photographs after the crash.
Colorado’s Following Too Closely Law Still Matters
Denver police reportedly cited one driver for following too closely.
C.R.S. 42-4-1008 provides that a driver may not follow another vehicle more closely than is reasonable and prudent, taking into account vehicle speed, traffic, and highway conditions.
A rear-end impact can therefore involve questions concerning following distance, speed, perception and reaction time, distraction, braking, and traffic conditions.
However, the issuance of a citation is not itself a final determination of civil liability.
A personal injury investigation should independently evaluate the evidence rather than simply relying on the traffic citation or police narrative.
What Makes an Autonomous Vehicle Accident Different?
The basic negligence questions may be familiar, but the evidence can be dramatically different.
In an ordinary Denver car accident, we may investigate:
- Police reports.
- Witness statements.
- Photographs.
- Surveillance footage.
- Vehicle damage.
- Event data recorder information.
- Cellphone use.
- Roadway evidence.
- Medical records.
- Insurance policies.
With an autonomous vehicle, the potential electronic evidence can be considerably broader.
Depending upon the system and what information exists, relevant evidence could potentially include:
- Onboard camera footage.
- Sensor information.
- Automated driving system logs.
- Vehicle location and movement data.
- Perception data showing what the vehicle detected.
- System status immediately before the crash.
- Software version information.
- Remote-assistance communications.
- Telematics.
- Braking and acceleration information.
- Steering inputs.
- Vehicle speed.
- Warnings or system messages.
- Data showing why the vehicle stopped.
- Maintenance information.
- Prior system faults or alerts.
The availability and discoverability of particular information depends upon the case. The important point is that a conventional crash investigation may not be enough.
Why Preservation of Electronic Evidence Matters
Autonomous vehicle cases can become evidence-intensive very quickly.
A vehicle equipped with cameras, lidar, radar, mapping technology, telematics, and automated decision-making software may contain or generate information that could help reconstruct what happened second by second.
That evidence should be identified early.
Depending upon the circumstances, an attorney may consider preservation requests directed to the vehicle owner, autonomous-driving company, involved drivers, insurers, towing companies, governmental agencies, nearby businesses, and other entities possessing potentially relevant information.
Preservation becomes particularly important when the vehicle may return to service, receive software updates, undergo repairs, or have stored information overwritten pursuant to ordinary retention practices.
A serious injury claim involving autonomous technology should therefore be treated as an electronic evidence case from the beginning.
Who Could Potentially Be Liable in a Colorado Autonomous Vehicle Accident?
There is no single answer.
Potential liability depends on what actually caused the crash.
A case might involve one or more of the following:
- A human driver who negligently caused the collision.
- The owner of another involved vehicle.
- An employer responsible for a driver acting within the course and scope of employment.
- The owner or operator of an autonomous vehicle.
- An automated-driving-system developer.
- A vehicle manufacturer.
- A component manufacturer.
- A maintenance provider.
- Another company involved in operating or maintaining the autonomous fleet.
- A governmental or roadway entity under appropriate circumstances.
That does not mean each of those parties should be sued whenever an automated vehicle is involved.
The evidence must support the claim.
A responsible investigation begins by identifying the cause of the collision rather than selecting a defendant simply because autonomous technology was present.
Could Product Liability Apply to a Self-Driving Vehicle?
Potentially, depending upon the evidence.
If an automated driving system or vehicle component actually malfunctioned and that defect caused an injury, product liability principles could become relevant.
Possible issues might include the design of the system, manufacturing defects, warnings, software performance, sensor performance, maintenance, or other technological failures.
But a product defect should not be assumed merely because a driverless vehicle behaved unexpectedly.
There may be a legitimate reason the system stopped or took a particular action.
The system data and technical evidence would need to be evaluated.
In a complex case, that can require automotive engineers, accident reconstructionists, software specialists, human-factors experts, or other technical experts.
What If Another Driver Causes the Crash?
The presence of an autonomous vehicle does not eliminate ordinary negligence claims against a human driver.
Consider a straightforward example.
A human driver follows another vehicle too closely and causes a rear-end collision. That vehicle is then pushed into a Waymo.
If the evidence establishes that the human driver’s negligence caused the entire sequence, the claim may remain primarily an ordinary motor vehicle negligence case even though a driverless vehicle happened to be one of the vehicles involved.
The technology should not distract from the basic causation analysis.
This appears particularly important in the August 27 crash because Denver police described the collision with the Waymo as secondary.
What If the Autonomous Vehicle Contributed to the Collision?
That presents a different investigation.
Suppose an autonomous vehicle unexpectedly stopped, changed lanes, accelerated, failed to yield, or otherwise performed a driving maneuver that contributed to a collision.
The investigation would then need to determine why.
Relevant questions could include:
- Was the maneuver appropriate under the circumstances?
- What did the automated system detect?
- Were there pedestrians, vehicles, construction, emergency equipment, roadway markings, or other conditions that caused the response?
- Was the system operating normally?
- Did a human or remote operator intervene?
- Was there a system fault?
- Did another driver’s conduct trigger the response?
- Could the other driver reasonably have avoided the collision?
These questions demonstrate why autonomous vehicle cases should not be reduced to statements such as “the robot caused it” or “the human driver caused it.”
Causation still requires evidence.
Colorado Generally Applies the Same Driving Standards to Automated Systems
Colorado has adopted a statewide approach to automated driving.
C.R.S. 42-4-110 addresses standards applicable to automated driving systems and limits inconsistent local regulation.
CDOT similarly explains that automated systems operating in Colorado generally must comply with applicable state and federal laws.
This provides an important principle for accident claims.
A driverless vehicle may use extraordinarily sophisticated technology, but when performing the physical driving task, it is still operating on the same roads and interacting with the same traffic rules as other vehicles.
Waymo Is Preparing to Expand Fully Autonomous Operations in Denver
The Denver crash is particularly timely because Waymo is preparing for broader autonomous operations in the city.
Waymo has identified Denver as an upcoming market and has announced plans to move toward fully autonomous operation without a human specialist before broader public service begins.
You can review Waymo’s current information regarding its expansion plans on the Waymo blog.
That means Denver drivers, pedestrians, bicyclists, insurers, police officers, lawyers, and courts will increasingly encounter accidents and traffic incidents involving automated vehicles.
Most will probably be resolved through familiar principles of negligence and insurance law.
Some will present genuinely new technological questions.
What Insurance Covers a Driverless Vehicle Accident?
Insurance coverage must be investigated separately from liability.
If a human driver negligently causes an accident involving an autonomous vehicle, the driver’s automobile liability insurance may apply in the ordinary manner.
If the autonomous vehicle itself caused or contributed to the collision, different commercial, corporate, fleet, product, or other insurance coverage may potentially be involved depending upon the circumstances.
An injured person’s own coverage may also matter.
Potential insurance sources can include:
- The negligent driver’s bodily injury liability coverage.
- Commercial automobile insurance.
- Corporate or fleet coverage.
- Umbrella or excess coverage.
- Uninsured motorist coverage.
- Underinsured motorist coverage.
- Medical payments coverage.
- Other applicable household policies.
An attorney should obtain and review the actual policies rather than assuming the vehicle involved tells the entire coverage story.
Could Uninsured or Underinsured Motorist Coverage Still Apply?
Potentially.
If a human driver causes a serious accident and does not have sufficient liability insurance to compensate the injured person fully, underinsured motorist coverage may become important.
The fact that a Waymo or another autonomous vehicle was also involved does not automatically eliminate the injured person’s first-party insurance rights.
Likewise, if an unidentified vehicle contributed to an accident, uninsured motorist issues may arise depending upon the facts and policy.
Coverage must be analyzed individually.
What Evidence Should an Injured Person Preserve?
After a serious accident involving an autonomous vehicle, traditional evidence remains important.
An injured person should preserve or identify:
- Photographs and video.
- Witness contact information.
- Police information.
- Vehicle damage.
- Medical documentation.
- Dashcam footage.
- Insurance information.
- Receipts and expenses.
- Employment records.
- Information concerning functional limitations.
But an attorney investigating the claim should also immediately consider the autonomous vehicle’s electronic evidence and other third-party data sources.
These cases can require a broader preservation strategy than an ordinary two-car collision.
Can the Waymo’s Cameras Help Prove What Happened?
Potentially.
Autonomous vehicles generally rely on sophisticated sensor systems to perceive their surroundings.
Whether particular video, sensor, or system data exists, is retained, and can legally be obtained depends upon the circumstances.
But the possibility should be investigated.
A driverless vehicle may theoretically possess information showing surrounding traffic movement before the crash, the position of other vehicles, braking, vehicle trajectories, or other circumstances relevant to reconstruction.
Even when the autonomous vehicle did not cause the collision, its data could potentially become an important source of evidence concerning what another driver did.
This is one of the most interesting practical differences presented by autonomous vehicle accidents.
The driverless vehicle may be a defendant, a claimant, a witness, or effectively an electronic observer of the collision, depending upon the circumstances.
Does a Traffic Citation Decide the Personal Injury Claim?
No.
A police officer’s conclusions and traffic citation can be relevant to the investigation, but civil liability is ultimately determined under applicable law and evidence.
An attorney should independently investigate the circumstances of the crash.
Police officers investigate traffic violations and public safety.
A civil attorney additionally needs to investigate insurance coverage, damages, electronic evidence, additional responsible parties, future medical losses, and other matters that may fall outside the scope of the police investigation.
What If Several Vehicles Are Involved?
Chain-reaction accidents can create disputes over causation.
One driver may argue another vehicle stopped unexpectedly.
Another may contend that the rear driver was following too closely.
An insurer may argue that an intermediate vehicle contributed to the sequence.
There may also be separate impacts occurring milliseconds or seconds apart.
Accident reconstruction can therefore become important.
Evidence such as vehicle damage, event data, surveillance footage, automated-driving-system information, witness accounts, roadway markings, and photographs may help determine the sequence.
Why a Denver Autonomous Vehicle Accident Attorney Needs to Look Beyond the Police Report
At Mandelaris Law, a serious motor vehicle claim is not evaluated simply by obtaining the police report and forwarding medical bills to an insurance adjuster.
Depending upon the case, the investigation may include:
- Insurance policies and endorsements.
- Vehicle ownership.
- Event data recorder evidence.
- 911 and dispatch records.
- Surveillance footage.
- Witness interviews.
- Vehicle inspections.
- Medical causation.
- Future medical needs.
- Lost earnings.
- Physical impairment.
- Accident reconstruction.
- Uninsured and underinsured motorist coverage.
- Third-party liability.
With an autonomous vehicle, the investigation potentially expands further into software, sensors, system logs, telematics, remote assistance, and other electronic information.
Technology changes the evidence.
It does not eliminate the need to prove negligence, causation, and damages.
You can review examples of the firm’s work on the Mandelaris Law case results page.
What Denver Drivers Should Know as Driverless Vehicles Become More Common
Autonomous vehicles are likely to become an increasingly ordinary part of Denver traffic.
Drivers should treat them like any other vehicle on the road.
Maintain a reasonable following distance.
Avoid distracted driving.
Do not assume a driverless vehicle will behave exactly as you expect.
If an autonomous vehicle appears stopped or behaves unusually, increase distance rather than attempting to predict what it will do.
After a collision, document the vehicle carefully.
Photograph the autonomous vehicle, its position, visible sensors, vehicle identification information, surrounding roadway conditions, other vehicles, and damage.
If the collision involves serious injuries, electronic evidence should be addressed promptly.
Speak With a Denver Car Accident Attorney
A collision involving an autonomous vehicle can present ordinary negligence issues alongside unusually complex electronic evidence and insurance questions.
Mandelaris Law represents people injured in serious motor vehicle accidents in Denver, Aurora, and throughout Colorado.
We investigate liability, insurance coverage, electronic evidence, medical damages, underinsured motorist coverage, and additional responsible parties when appropriate.
You can also review our guide concerning what to do after a Denver car accident.
For a free consultation, call Mandelaris Law at (303) 357-9757.
Frequently Asked Questions About Denver Waymo and Autonomous Vehicle Accidents
Is Waymo legal in Colorado?
Colorado permits automated driving systems under C.R.S. 42-4-242 when the statutory requirements are satisfied. CDOT explains that qualifying automated systems may operate with or without a human driver when they comply with applicable state and federal laws.
Who is liable if a Waymo causes a crash in Denver?
There is no automatic answer. C.R.S. 42-4-242 provides that liability for a crash involving an automated driving system operating without human control is determined according to applicable state law, federal law, or common law.
Is Waymo automatically liable if its vehicle is involved in an accident?
No. Involvement does not establish fault. The cause of the collision must be investigated.
Can a human driver still be liable for hitting a self-driving vehicle?
Yes. Ordinary Colorado negligence and traffic laws continue to apply to human drivers. C.R.S. 42-4-1008, for example, prohibits following another vehicle more closely than is reasonable and prudent under the circumstances.
What if the autonomous vehicle stopped unexpectedly?
The reason for the stop should be investigated. Relevant evidence may include onboard cameras, sensor data, automated-driving-system logs, vehicle data, roadway conditions, traffic conditions, and the actions of surrounding drivers.
Can a Waymo’s electronic data be used as evidence?
Potentially. The existence, retention, discoverability, and admissibility of specific data depend upon the circumstances. Preservation of potentially relevant electronic evidence should be considered early in a serious case.
Can product liability apply to a driverless vehicle accident?
Potentially, if competent evidence establishes that a product defect caused or contributed to the injuries. The mere involvement of autonomous technology does not establish a defect.
Does car insurance still apply when a driverless vehicle is involved?
Yes. The specific policies depend upon who caused the collision and the relationships among the parties. Liability, commercial, fleet, uninsured motorist, underinsured motorist, medical payments, umbrella, and other coverage may require investigation.
Should I wait for Denver police to finish investigating before contacting an attorney?
Not necessarily. A police investigation and civil investigation serve different purposes, and some electronic, video, and vehicle evidence may be time-sensitive.
Legal Disclaimer: This article provides general information about Colorado law and is not legal advice. Reading this article does not create an attorney-client relationship. Nothing in this article is intended to assign fault to Waymo or any person involved in the August 27, 2026 Denver collision. Public reporting describes the Waymo impact as a secondary collision, and the available information does not establish that the Waymo caused the initial crash. Every personal injury claim depends upon its particular facts, evidence, insurance policies, and applicable law. Past results do not guarantee future outcomes.
About the Author: Steven T. Mandelaris, Esq. is a Colorado attorney whose practice includes automobile accidents, catastrophic personal injury, insurance disputes, uninsured and underinsured motorist claims, workers’ compensation, and wrongful death litigation. Mandelaris Law represents plaintiffs and claimants throughout Colorado.
Need Legal Guidance After an Autonomous Vehicle Accident?
If you or a loved one were involved in a crash with a Waymo or other autonomous vehicle in Denver or Colorado, don’t wait. The complexity of self-driving car accidents demands experienced legal representation. Contact Mandelaris Law today for a free consultation.
Our experienced attorneys understand Colorado accident law and how to investigate and determine liability in autonomous vehicle cases. We’ll help you understand your rights and pursue the compensation you deserve.
Call us now or use our online contact form to schedule your free consultation.