Left-turn crashes look chaotic from the outside. Arizona law is unusually direct about who’s responsible, though. Left-turn accident fault in Arizona almost always starts with the turning driver. The exceptions are narrower than most people assume.
The rule: the turning driver yields
Arizona Revised Statutes § 28-772 puts the duty squarely on the driver turning left. They must yield to oncoming traffic that’s within the intersection, or close enough to be an immediate hazard. That duty applies even if the oncoming driver is speeding. It applies even if that driver runs a red light or stop sign. If there’s any real chance of a collision, the left-turning driver isn’t supposed to complete the turn.
Why this creates negligence per se
Arizona treats a clear statutory violation like this as strong evidence of negligence on its own. Lawyers call this negligence per se. A left-turning driver who collides with oncoming traffic often can’t point to much beyond “I thought I had time.” That’s rarely a defense. The statute puts the yielding duty on them specifically, not on the oncoming driver.
Where the exceptions actually live
The turning driver’s duty depends on the oncoming vehicle being close enough to be a real hazard. A car far enough away doesn’t automatically make the turn illegal. Neither does one that appears well after the turn is safely underway. Left-turn accident fault in Arizona can shift, at least partially, if the oncoming driver was speeding dramatically, distracted, or driving in a way that made an otherwise-safe turn impossible to judge. That’s where comparative negligence comes in. Fault can be shared even when one driver carries most of it.
How this plays out at a signal versus a stop sign
An unprotected left turn against oncoming traffic at a green light works differently than a turn governed by a dedicated arrow. It works differently again at an uncontrolled intersection. Signal timing and camera footage matter more at a light-controlled intersection, similar to our guide to T-bone and red-light accidents. Witness accounts of speed and distance carry more weight where there’s no signal at all.
The bottom line
Left-turn accident fault in Arizona sits with the turning driver by default under state law. It takes real evidence, not just a close call, to shift that presumption. If you were the oncoming driver, document speed, distance, and signal timing early. If you were turning, that same evidence is what a fair comparative-fault argument depends on.
Frequently asked questions
The driver turning left is usually presumed at fault, since Arizona law requires them to yield to oncoming traffic that’s within the intersection or close enough to be an immediate hazard.
Yes, if the oncoming vehicle wasn’t actually close enough to be a hazard, or if the oncoming driver was speeding or driving in a way that made the turn impossible to judge safely.
It means a clear violation of the yield statute is treated as strong evidence of negligence on its own, without needing much additional proof of carelessness.
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This article is general information, not legal advice, and reading it does not create an attorney–client relationship. Fault in a disputed left-turn crash depends on the specific facts and evidence in your case — review them with a licensed Arizona attorney before accepting any settlement offer.