Utah Rear-End Collisions: Following Distance, Fault, and the Myth of an Automatic Presumption
General information, not legal advice. Read the full disclaimer.
Short answer: Utah's following-distance statute, § 41-6a-711, says a driver may not follow another vehicle more closely than is reasonable and prudent, considering speed, traffic and road conditions, and must follow at a distance so that at least two seconds elapse before reaching the location of the vehicle directly ahead. A violation is an infraction. The two-second rule does not apply in congested traffic with prevailing speeds under 35 mph, in funeral processions, or to non-lead vehicles in a connected platooning system. In practice the rear driver is usually found mostly at fault, but we did not find a Utah statute creating a legal presumption of negligence against the rear driver — some law-firm pages cite § 41-6a-710 for that, but that section deals with marked lanes and lane changes, not following distance.
Who this guide is for
Utah drivers and passengers hurt in a rear-end crash, or accused of causing one.
What the following statute says
Section 41-6a-711 (effective May 8, 2018; confirm current text):
- The operator may not follow more closely than is reasonable and prudent, having regard for the speed of the vehicles, traffic on the highway and the condition of the highway.
- The operator shall follow at a distance so that at least two seconds elapse before reaching the location of the vehicle directly in front.
- The two-second requirement doesn't apply to funeral processions, to congested traffic with prevailing speeds under 35 mph, or to a non-lead vehicle in a connected platooning system.
- A violation is an infraction.
What about the lane statute?
Section 41-6a-710(1) requires a driver on a marked-lane roadway to keep the vehicle as nearly as practical in a single lane and not to move from the lane until the operator has reasonably determined the movement can be made safely. That matters when a lead driver cut in and braked, but it isn't a presumption against the trailing driver.
When the front driver shares fault
Common arguments, which depend on the evidence:
- A sudden, unjustified stop or "brake check."
- Unsafe lane change or merging without space (§ 41-6a-710).
- Inoperative brake lights or stopping in a travel lane with no warning.
- Reversing or backing into the vehicle behind.
- A prior collision that made the lead driver stop — the chain-reaction analysis.
Under Utah's comparative negligence statute (§ 78B-5-818), your fault doesn't alone bar recovery, but you can recover only from defendants whose combined fault exceeds yours. Each defendant pays only its percentage of fault (§ 78B-5-820). See Utah's Comparative Fault Rule and Utah's Several-Liability Rule.
Chain-reaction crashes
In multi-car pileups, who hit whom first, how much space each driver had and what the lead vehicles did all matter. Event data recorders, camera footage and damage patterns are often decisive.
Injury claims after a rear-end crash
- PIP pays first regardless of fault. See Utah's PIP Coverage Explained.
- Whiplash and soft-tissue injuries are common. See Utah Whiplash and Soft-Tissue Injury Claims.
- A general damages claim against the at-fault driver requires meeting the threshold. See Utah's No-Fault Tort Threshold.
- Low-speed crashes don't automatically mean minor injuries, and insurers often argue they do; documentation matters.
- Commercial trucks have extra rules. See Utah Commercial Truck Accident Claims.
What to do
- Call 911 and get medical care.
- Photograph both vehicles, damage and brake lights.
- Get witness information and nearby camera locations.
- Notify your insurer and request the report. See How to Request a Utah Accident Report.
- Avoid recorded statements until you understand your rights. See Should You Give a Recorded Statement to the Adjuster?.
Frequently asked questions
Is the rear driver always at fault in Utah?
Often, but not always. The front driver can share fault, and the statute sets a duty to follow at a reasonable distance rather than a legal presumption.
What is the two-second rule?
Under § 41-6a-711(2)(b), a driver must follow at a distance so that at least two seconds elapse before reaching the vehicle ahead, with listed exceptions.
Does the two-second rule apply in heavy traffic?
Not in congested traffic with prevailing speeds under 35 mph, though the general "reasonable and prudent" duty remains.