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If you ride in Phoenix and you’ve been hit while moving between lanes, the first thing to know is that most of the legal information online about lane splitting in Arizona is outdated. The law changed in September 2022. A lot of competitor pages still tell riders that any movement between lanes is illegal. That’s wrong, and if you accept that framing from an insurance adjuster, you can lose tens of thousands of dollars in settlement value before you understand what happened.
This article walks through what A.R.S. § 28-903 actually allows, what it doesn’t, how adjusters use the statute to push fault onto riders, and what a rider can recover even when the insurer claims partial fault. For broader context on rider claims, our overview of the common causes of motorcycle accidents covers the wider pattern.
This distinction matters more than almost anything else on this page.
Lane splitting is what most people picture: a rider moving between rows of traffic that are still flowing, often at speed, often on a freeway. That is illegal in Arizona. It has always been illegal in Arizona.
Lane filtering is narrower. It’s a rider moving slowly between stopped vehicles at an intersection. As of September 2022, this is legal in Arizona under specific conditions. The 2022 amendment to A.R.S. § 28-903 created a carve-out, not a free pass.
If the adjuster handling the claim is using “lane splitting” and “lane filtering” interchangeably, that’s either a mistake or a tactic. Either way, riders need to be clear on the distinction before responding to anything an insurer puts in writing.
The statute legalizes lane filtering at intersections, but only when four specific conditions are all met at the same time. If even one is missing, the rider is operating outside the statute, and the conduct reverts to the pre-2022 prohibition.
For lane filtering to be legal in Arizona, all four must be true:
Miss any one of those, and the legal protection disappears.
This is the cleaner scenario. The rider is between two stopped lanes at a red light, traveling under 15 mph on a 40 mph road, and a driver in one of the stopped lanes suddenly turns the wheel or opens a door without checking a mirror. The motorcycle goes down.
In a fact pattern like that, the driver who moved or opened the door bears most or all of the fault. They had a duty to look before changing position. The rider was doing something the legislature has affirmatively legalized. Fault sits with the driver, and the claim proceeds like a standard motorcycle injury matter.
That doesn’t mean the insurer will concede liability quickly. They almost never do on motorcycle claims. But the legal posture is strong.
Now flip the facts. The rider was moving at 25 mph between cars that were rolling, not stopped, on a 50 mph stretch of Camelback Road. Same collision, same injuries, very different legal landscape.
In that scenario, the rider was violating A.R.S. § 28-903. The other driver’s insurer will argue the rider was the proximate cause of the crash because they were doing something illegal at the moment of impact. That argument is not automatically a winner for the insurer, but it gives them leverage they wouldn’t otherwise have.
Here’s the critical point most riders miss: a statutory violation does not automatically bar recovery in Arizona. It opens the door to a comparative fault argument. That’s a very different thing, and it’s where Arizona’s pure comparative negligence rule changes the entire calculation.
The pattern in lane-filtering claims is predictable. The adjuster reads the police report, sees “motorcycle between lanes,” and immediately starts building a fault narrative against the rider. They’ll do some or all of the following:
The goal is to push the rider’s assigned fault percentage as high as possible. Every percentage point they tack on comes directly out of recovery.
This is the most important paragraph on this page.
Arizona is one of only twelve states with pure comparative negligence under A.R.S. § 12-2505. That means a plaintiff can recover damages even if found 99% at fault. They recover 1% of their damages, but they recover. There is no fault threshold that wipes out the claim entirely. Most states have a 50% or 51% bar that cuts the plaintiff off completely. Arizona doesn’t. For a full breakdown, see how comparative negligence works in Arizona.
Here’s how that plays out in a lane-filtering claim:
For a broader overview of how Arizona’s fault and damages rules apply across injury claims, the Arizona Personal Injury Law Guide covers the statutory framework in detail.
Suppose total damages are $100,000 (medical bills, lost wages, pain and suffering). The other driver’s insurer convinces the jury the rider was 30% at fault because they weren’t sure traffic was fully stopped when the rider started filtering. Recovery is $70,000. Not zero. Not blocked. Reduced.
Now imagine a worse scenario. The jury finds the rider 60% at fault because they were doing 20 mph instead of 15. In a 50%-bar state, recovery is zero. In Arizona, recovery is $40,000. That’s a real number for a real rider with real medical bills.
This is why riders shouldn’t assume the claim is dead just because an adjuster said they were “clearly violating the statute.” Even if that’s true, recovery is still on the table.
Adjusters frequently inflate the plaintiff’s fault percentage in their internal reserve calculations to justify a low offer. If they value the claim at $100,000 and assign 50% fault, they reserve $50,000. If they assign 70%, they reserve $30,000. The counter is evidence that pushes the percentage down: traffic camera footage, dashcam from other vehicles, witness statements, accident reconstruction, and police body cam.
Motorcyclists are roughly 28 times more likely than car occupants to die in a crash per vehicle mile traveled, according to NHTSA data. Even non-fatal crashes produce severe injuries because there’s no metal shell around the rider. In filtering and splitting cases specifically, common injuries include:
A note on rear-end impacts in filtering scenarios. When a rider is filtering and a vehicle from behind suddenly rolls forward into the rider, that’s effectively a rear-end collision. Arizona generally presumes the following driver at fault in a rear-end crash, applied through the pure comparative negligence framework. National crash data attributes the bulk of rear-end collisions to following too closely (roughly 61%), distracted driving (around 28%), and unjustified sudden stops (around 11%). Two exceptions cut the other way: when the lead vehicle makes an unjustified sudden stop, comparative fault can shift back to the lead driver, and when the lead vehicle has non-functioning brake lights, the lead vehicle can bear partial fault. Both exceptions come up in motorcycle-versus-car rear-end claims more than people expect.
In rear-end cases generally, the most common injury pattern is whiplash (medically defined as cervical acceleration-deceleration injury, soft tissue trauma to the neck and upper back), along with herniated discs, broader soft tissue damage, traumatic brain injury, and facial trauma from airbag deployment. Phoenix-area settlement ranges vary widely with severity: minor whiplash claims tend to land in the $5,000 to $25,000 range, moderate whiplash with sustained chiropractic care in the $15,000 to $40,000 range, and herniated discs requiring surgery from $100,000 well into the high six figures. Those are illustrative ranges, not predictions; every case turns on its own medical records, liability picture, and policy limits.
Damages in motorcycle cases fall into two categories:
Economic damages are the quantifiable financial losses: emergency room and hospital bills, surgery, physical therapy, future medical costs, lost wages, lost earning capacity, and motorcycle property damage.
Non-economic damages cover pain, suffering, disfigurement, loss of enjoyment of life, and emotional distress. Arizona has no cap on non-economic damages. The Arizona Constitution, Article 2, Section 31, explicitly prohibits legislative caps on damages for death or personal injury. A jury can award what the evidence supports. This matters a lot in motorcycle cases because the non-economic component is often larger than the economic component when injuries are catastrophic.
If you can move and you’re not being loaded into an ambulance, these steps protect the claim:
This is critical for riders. A rider is not legally required to give a recorded statement to the other driver’s insurance company. Ever. They will call, they will be polite, they will say it’s “just standard procedure” or that they “can’t process the claim without it.” None of that is true.
What they’re actually doing is fishing for statements about speed, lane position, and whether traffic was stopped. Every word becomes evidence the defense can use to reduce a settlement or push fault onto the rider.
Riders are especially vulnerable here because the questions are designed to extract a concession. “About how fast were you going?” Any answer above 15 mph kills the statutory protection. “Were the cars completely stopped or just slowing down?” The word “slowing” puts the rider outside the statute. A rider can answer those questions honestly without knowing it, because they don’t know what the statute requires.
Talk to an attorney before talking to the other side. Your own insurance carrier is a different conversation (the policy usually obligates cooperation), but even there, counsel can be present.
Two practical points that come up in nearly every motorcycle case.
Arizona gives an injured person two years from the date of the crash to file a personal injury lawsuit, under A.R.S. § 12-542. That same two-year deadline applies in rear-end cases, filtering cases, and standard intersection crashes alike. It’s a hard deadline. Miss it and the claim is gone, regardless of how strong the facts. For more detail on how the clock runs and the limited exceptions, see Arizona’s two-year statute of limitations.
Two years feels like a long time when you’re three weeks out from the crash. It isn’t. Investigation, medical treatment, and pre-suit negotiation routinely eat 12 to 18 months. Claims filed in the final 60 days of the limitations period are uphill battles.
Arizona’s minimum liability insurance is 25/50/15: $25,000 bodily injury per person, $50,000 bodily injury per accident, and $15,000 property damage. For a motorcycle rider with a broken femur and a brain injury, that minimum policy is gone in the first 48 hours of hospital care.
This is where the rider’s own uninsured/underinsured motorist (UM/UIM) coverage matters. Under A.R.S. § 20-259.01, Arizona insurers are required to offer UM and UIM coverage. A consumer can reject it in writing, but they have to actively reject it. UM/UIM minimums mirror the liability minimums (25/50). Most riders carry at least some UM/UIM. If you don’t remember whether you do, dig out the declarations page and look.
UM/UIM is often the practical recovery source in motorcycle cases because the at-fault driver carries minimum limits and has no real assets. One note: Arizona prohibits “stacking” of UM coverage across multiple policies, so don’t assume limits from an auto and a motorcycle policy can be combined.
Lane-filtering crashes share a lot of fault-dispute DNA with left-turn crashes involving motorcycles, where the oncoming car turns across the rider’s path and the driver claims they “didn’t see” the bike. Both involve a driver who failed to look, both involve aggressive defense narratives, and both turn heavily on independent witness evidence. If a crash involved either pattern, the playbook is similar.
Yes, but only under the four conditions in A.R.S. § 28-903: posted limit of 45 mph or less, two or more same-direction lanes, motorcycle going 15 mph or less, and the other traffic stopped. Miss any one and the conduct falls outside the statute.
They were technically outside the statute, which lets the adjuster argue comparative fault. Recovery is still available under Arizona’s pure comparative negligence rule, but the assigned fault percentage will be higher and the settlement reduced accordingly. The claim is not dead.
No. Freeway speed limits are well above 45 mph, and freeway traffic that’s “stopped” usually isn’t truly stopped for long enough to satisfy the statute. Filtering on a Phoenix freeway is illegal even after the 2022 amendment.
Don’t argue on the phone. Don’t give a recorded statement. Get the police report, any traffic camera footage, witness contact info, and talk to a motorcycle accident attorney before responding in writing.
Arizona only requires helmets for riders under 18. Adjusters sometimes try to use helmet non-use as a comparative fault argument, but Arizona courts have generally rejected that for adult riders. It can come up if injuries are head-specific, but it’s not the case-killer adjusters want riders to think it is.
Two years from the date of the crash under A.R.S. § 12-542. Don’t wait. Investigation and treatment timelines burn through that window faster than expected.
Lane-filtering crashes are a new enough category in Arizona that most general practitioners haven’t worked through how the 2022 statute interacts with comparative negligence. The adjuster across the table almost certainly has. Before signing anything, giving a statement, or accepting an offer, get a clear answer about what a claim like yours is actually worth.
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By Jared J. Pehrson | Impact Legal Car Accident Attorneys
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