Skip to content 
Motorcycle crashes cluster, and not randomly. They concentrate at a specific kind of intersection, in a specific collision pattern, for reasons that have more to do with road design and human perception than with rider behavior. Understanding that pattern matters legally as well as practically, because when the intersection itself contributes, the deadline to act is far shorter than most riders assume.
Why Do Left-Turn Collisions Dominate?
Because a motorcycle is hard to judge, not hard to see. The single most common serious motorcycle collision in Phoenix is the left cross: an oncoming driver turns left across a rider proceeding straight. A.R.S. § 28-772 places the duty squarely on the turning driver to yield to oncoming traffic close enough to constitute an immediate hazard.
Three things make this pattern so persistent:
Narrow frontal profile. A motorcycle presents a fraction of the visual width of a car. Approaching objects that are physically smaller are consistently judged to be farther away and arriving later than they actually are, so a driver looking at a real gap misreads how much time they have.
Drivers search for a car-shaped hole. A left-turning driver scanning for a gap is pattern-matching against the profile of a vehicle. A single headlight in a wide lane does not trigger the same response, which is why “I looked and never saw the motorcycle” is so common and why it is closer to an admission than an excuse. Failing to perceive a plainly visible motorcycle is a failure to keep a proper lookout.
Permissive left turns. On a flashing yellow arrow or a green ball with no protected phase, the burden of judging the gap sits entirely with the turning driver. Protected-only left phasing removes that judgment; permissive phasing depends on it being made correctly every time.
What Makes a Phoenix Intersection Higher Risk?
Design characteristics, not bad luck. The features that recur are consistent enough to be predictive:
- Wide multi-lane arterials with permissive left turns. Phoenix’s mile-grid arterials Bell Road, Camelback, Indian School, Thomas, McDowell, and the numbered avenues combine 40 to 45 mph posted speeds with long crossing distances and unprotected left phases.
- East-west corridors at sunrise and sunset. Low sun on Camelback, Indian School, or Thomas produces genuine glare blindness at predictable times of day.
- Freeway ramp intersections. Drivers exiting I-10, I-17, the Loop 101, Loop 202, or SR 51 are still carrying freeway speed and scanning for the next turn rather than for a motorcycle.
- The Grand Avenue diagonal. Grand cuts across the grid at an oblique angle with a rail line alongside, creating offset multi-leg intersections, unusual sightlines, and rail crossings taken at shallow angles a distinct hazard for a two-wheeled vehicle.
- Long signal cycles. Where a driver has waited through a full cycle, gap-acceptance decisions get made under pressure.
Our overview of Phoenix’s most dangerous intersections and sidewalks covers the broader picture beyond motorcycle claims.
What Evidence Disappears First?
Almost everything that proves the sequence. A left-cross case turns on how long the rider was visible and whether the driver ever slowed. Neither is established by testimony, and the sources that do establish it have short retention windows.
In rough order of how quickly they vanish:
- Business, doorbell, and parking-lot camera footage, much of which overwrites within days. Note exact addresses at the scene.
- The other vehicle’s event data recorder, capturing pre-impact speed, throttle, braking, and steering. It leaves with the car when it goes to salvage, often the strongest evidence in the file, because a complete absence of braking shows the driver never perceived the hazard.
- Skid and gouge marks, debris fields, and fluid trails, which fix point of impact and direction of travel until the next rain or street sweeper.
- The motorcycle itself. Frame deformation, fork geometry, and wheel damage establish impact angle and speed. Repairing or scrapping it destroys that record, so preserve it unrepaired along with your helmet and gear.
- Signal timing and phasing records, held by the city and obtainable, which establish whether the left turn was protected or permissive at that moment.
The crash report matters too, and freeway collisions on I-10, I-17, the Loop 101, Loop 202, or SR 51 are typically worked by the Arizona Department of Public Safety rather than Phoenix PD so requesting it from the right agency is the first step rather than an afterthought.
Acting quickly with a Phoenix motorcycle accident lawyer helps preserve the dashcam footage and skid-mark evidence that often disappears within days.
What If the Intersection Itself Was the Problem?
Then a public entity may share responsibility and the deadline collapses to 180 days. This is the legal consequence of the hotspot pattern that almost no one connects.
Where signal timing, phasing, sightline obstruction, signage, pavement condition, or roadway design contributed to a collision, the City of Phoenix, the county, or the State may be a defendant. Under A.R.S. § 12-821.01, a claim against a public entity generally requires a formal notice of claim served within 180 days of accrual, on the official authorized to accept service, stating a specific settlement amount with the facts supporting it. Suit must then be filed within one year under A.R.S. § 12-821 rather than two.
Two practical consequences follow. Signal and maintenance records need to be requested early, because the notice has to state a factual basis. And a defective or misdirected notice can bar the claim entirely while the two-year window against the driver is still wide open. The deadlines that apply to your claim are worth confirming in the first week, not the first year.
How Does Fault Get Divided?
By percentage, and that percentage is negotiable. Arizona applies pure comparative negligence under A.R.S. § 12-2505, so an award drops by the rider’s assigned share with no cutoff; a rider found 30% responsible still recovers 70% of proven damages.
In a left-cross case the insurer’s arguments are predictable: the rider was speeding, was lane-splitting rather than filtering lawfully, or was not visible. Each is answerable with reconstruction and sightline analysis, and how fault gets apportioned is a position rather than a finding. Our page on proving fault in a motorcycle case sets out the mechanics, and Arizona’s rider-specific statutes cover the rest.
Coverage is often the real ceiling. A.R.S. § 28-4009 sets Arizona’s minimums at $25,000 per person and $50,000 per accident, which one orthopedic surgery can exhaust which is why your own underinsured motorist coverage frequently becomes the practical source of recovery. Severe outcomes run toward brain injury claims and, in fatal collisions, a wrongful death action.
Frequently Asked Questions
Why are left-turn crashes the most common motorcycle collision? A motorcycle’s narrow frontal profile makes it harder to judge than to see. Smaller approaching objects are consistently perceived as farther away and arriving later than they are, and a left-turning driver scanning for a gap is pattern-matching against the profile of a car. Under A.R.S. § 28-772 the duty to yield sits with the turning driver.
Does “I never saw the motorcycle” help the driver’s defense? Generally the opposite. Failing to perceive a plainly visible motorcycle is a failure to keep a proper lookout rather than an excuse. Sightline analysis and the other vehicle’s event data recorder can establish how long you were visible and whether the driver braked at all.
Can I sue the city if a bad intersection caused my crash? Potentially, where signal timing, phasing, signage, sightline obstruction, or roadway design contributed. But the timeline is much shorter: a notice of claim is generally required within 180 days under A.R.S. § 12-821.01, followed by one year to file suit, and a defective notice can bar the claim while the deadline against the driver remains open.
What evidence should I preserve after a Phoenix motorcycle crash? Note the exact addresses of nearby business and doorbell cameras, since much of that footage overwrites within days. Preserve the motorcycle unrepaired along with your helmet and gear, because frame and wheel damage establish impact angle and speed. Photograph skid marks, gouge marks, and debris before they are swept or washed away.
Will my recovery be reduced if I was partly at fault? Yes, by your assigned percentage but nothing bars recovery. Arizona is a pure comparative negligence state, so a rider found even 70% responsible may still recover 30% of proven damages. Insurers assign that percentage early and state it as settled; it is a negotiating position.
Talk to a Phoenix Motorcycle Accident Lawyer
The intersection that produced your crash has probably produced others, and the records that show why are held by the city. So is a 180-day clock.
Harris Injury Law, PLLC 1136 E Campbell Ave, Phoenix, AZ 85014 (480) 800-4878
Consultations are free and cases run on a contingency fee, meaning no attorney fee unless compensation is recovered. Request a consultation or meet our attorneys. Every case depends on its own facts; no outcome can be promised or predicted.
This article provides general information about Arizona law and is not legal advice. Reading it creates no attorney-client relationship. Arizona law changes, and outcomes depend on the specific facts of a claim. Consult a licensed Arizona attorney about your situation.
Reviewed by Jason A. Harris, Harris Injury Law, PLLC.
