Utah Self-Driving Vehicle Accident Claims: 2026 Rules for Level 4 and 5 Systems
General information, not legal advice. Read the full disclaimer.
Short answer: In 2026 Utah amended its Product Liability Act to add special rules for crashes involving Level 4 and Level 5 automated driving systems (ADS). For a claim that the automated driving system's operation was defective, the plaintiff must prove by a preponderance of the evidence that (a) a reasonable and feasible alternative design existed when the system was designed and manufactured, and (b) use of the system, "at scale and in the aggregate," causes more injuries than humans performing a similar task without it. And there's a rebuttable presumption of no defect if the system conforms to applicable U.S. federal motor vehicle safety, bumper, and theft prevention standards in effect on the vehicle's manufacture date and was authorized for use or operation in Utah (Utah Code § 78B-6-703(3)–(4)).
Who this guide is for
People injured in a crash involving a driverless or highly automated vehicle — a robotaxi, an automated shuttle, or a vehicle operating in a high-level automated mode — who want to understand how Utah's product-liability rules treat these claims.
What the 2026 law covers
The amended definitions describe an "ADS-equipped vehicle" and an "automated driving system" by reference to Utah's automated-vehicle statute (§ 41-26-102.1). The special standard in § 78B-6-703(3) applies to a claim that a Level 4 or Level 5 ADS — one that performs the entire driving task within its design domain (Level 4) or everywhere (Level 5) — had a defect in its operation, or that an ADS-dedicated vehicle had such a defect.
It's different from the standard rule for other products, under which you must show a defect that made the product unreasonably dangerous when sold, with a rebuttable presumption of no defect if the design and manufacturing methods conformed to government standards.
What a plaintiff must prove for an ADS-operation defect
By a preponderance of the evidence:
- A reasonable and feasible alternative design existed at the time the Level 4 or 5 ADS was designed and manufactured; and
- Aggregate safety comparison: the use of the ADS, at scale and in the aggregate, causes more injuries to persons than would be caused by humans performing a similar task, at scale and in the aggregate, without an ADS.
Both are required. The second element is unusual: it's a population-level comparison, not just proof about your crash.
The presumption that protects manufacturers
A Level 4 or 5 ADS is presumed free from any defect if it:
- conforms to all applicable U.S. federal motor vehicle safety, bumper, and theft prevention standards in effect on the vehicle's manufacture date; and
- was authorized for use or operation in the state.
The presumption is rebuttable, but it makes an ADS claim harder than an ordinary product claim.
What this means in practice
- Evidence is technical. Event data, sensor logs, software versions, and company safety reports can be central. Send preservation requests early.
- Other parties may still be responsible. A human driver or fleet operator, a maintenance provider, a road authority, or another driver may share fault; Utah allocates fault by percentage and each defendant pays its share. See Utah's Several-Liability Rule.
- Ordinary negligence claims against a human who was supposed to supervise a lower-level system (Level 2 or 3 driver-assist) aren't governed by the ADS provision. Distracted or inattentive drivers remain responsible; see Utah Distracted Driving Accident Claims.
- Insurance still applies. PIP, UM/UIM, and liability coverage rules work the same way for the vehicle's owner and operator. See Utah's No-Fault Tort Threshold.
Rideshare and automated vehicles
Utah's rideshare statute now treats a Level 4 or 5 automated driving system operating the vehicle for compensation as a "transportation network driver," and defines a transportation network company to include certain automated-vehicle operations. If you were a passenger in an automated rideshare vehicle, see Utah Rideshare Accident Claims.
Deadlines
The Product Liability Act's deadline is two years from discovery of both the harm and its cause. Other claims (negligence, wrongful death) have their own periods. See Utah Product Liability Act Explained and Utah Personal Injury Statute of Limitations.
Frequently asked questions
Do driver-assist features like adaptive cruise control or lane-keeping count?
The special standard applies to Level 4 and Level 5 automated driving systems. Most consumer driver-assist features are lower levels and aren't covered by the ADS provision; the vehicle's actual capability and the statute's definitions control.
Do I have to prove the system causes more injuries than human drivers?
For a claim that a Level 4 or 5 ADS's operation was defective, the statute requires proof of both a feasible alternative design and the aggregate-injury comparison.
Is there a presumption in favor of the manufacturer?
Yes — if the system meets applicable federal standards and was authorized for use in Utah, it's presumed free from defect.
Who else can be liable?
Operators, owners, maintenance providers, other drivers, and governmental entities may share fault depending on the facts.