How is fault determined in an Arizona car accident?

Arizona is a “fault” state — meaning the driver responsible for a crash (and their insurer) is responsible for the resulting damages. Identifying that driver and proving the share of responsibility is where most car accident cases are actually won or lost.

Key concepts

Fault state: the at-fault driver and their insurer pay your damages.
Pure comparative negligence: even if you share blame, you can still recover (your share reduces the total).
A police report is influential but not binding — fault is ultimately decided by the parties or, if litigated, a judge or jury.
Evidence quality controls the outcome more than legal argument does.

What “pure comparative negligence” actually means

Under Arizona law, fault can be split. If a jury (or insurance adjuster) decides you were 20% responsible for the crash, your recovery is reduced by that 20% — but it isn’t eliminated. Even if you were 70% at fault, you could still recover the remaining 30% of your damages. That makes early adjustment-stage statements particularly important: “admitting” 30% in a casual phone call can lock in numbers you’d never agree to in writing.

Evidence that drives the analysis

Police or DPS report

Officer findings, citations issued, witness statements, scene diagram.

Surveillance and dashcam video

Often dispositive — and often gone in days without a preservation letter.

Vehicle event-data recorder downloads

Speed, brake input, steering, seatbelt status in the seconds before impact.

Phone records

Distracted-driving cases are made when call/text logs match the timeline.

Witness statements

Independent witnesses are powerful — and become hard to find weeks later.

Scene photos and physical evidence

Damage patterns, debris field, skid marks, gouge marks — all meaningful for reconstruction.

Reconstruction expert analysis

When fault is genuinely disputed, a qualified expert can model what physically must have happened.

Common ways insurers attack your share of fault

"You were following too closely."

Defensible with photos of road conditions, signal timing, and witness statements.

"You should have seen them."

Sight-line analysis and reconstruction often disprove this.

"You weren't wearing a seatbelt."

Arizona generally limits how this evidence can be used to reduce damages.

"You were on your phone."

Phone records resolve this quickly — in either direction.

"You were going too fast."

EDR data is the cleanest answer when available.

How is fault determined in an Arizona car accident?

What “pure comparative negligence” actually means

Evidence that drives the analysis

Common ways insurers attack your share of fault

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