How motorcycle crashes happen
- Left-turning drivers who misjudge or fail to see an oncoming motorcycle, the classic "I didn't see him" crash
- Lane changes into a rider in a blind spot
- Rear-end collisions at lights and in slowing traffic
- Doors opened into a rider's path
- Road hazards such as potholes, debris and uneven pavement that a car would absorb but can throw a rider
Lane splitting and lane filtering: California vs. Arizona
California
California defines lane splitting as riding a two-wheeled motorcycle between rows of stopped or moving vehicles in the same lane, and authorizes the CHP to develop safety guidelines for it. Cal. Veh. Code § 21658.1 Lane splitting is not prohibited, but whether a rider did it safely, for example at speed relative to traffic, can still be argued as comparative fault.
Arizona
Arizona generally prohibits riding between lanes, but since 2022 allows a two-wheeled motorcycle to filter between lanes of stopped traffic when it is safe, on roads with at least two lanes in the same direction, a speed limit of 45 mph or less, and with the motorcycle going 15 mph or less. A.R.S. § 28-903(F) Filtering outside those limits can be raised against a rider.
Helmets and fault
California requires riders and passengers to wear a compliant helmet. Cal. Veh. Code § 27803 Arizona's helmet requirement applies to riders under 18. A.R.S. § 28-964 Insurers often argue that a missing or non-compliant helmet made injuries worse. That argument goes, at most, to head injuries the helmet would have prevented, not to who caused the crash. It does not justify blaming a rider for a driver's failure to yield.
In both states, comparative fault reduces but does not bar recovery. Li v. Yellow Cab Co. (1975) 13 Cal.3d 804; A.R.S. § 12-2505
Common motorcycle injuries
Road rash and skin grafts, fractures of the legs, pelvis, wrists and collarbone, traumatic brain injury, spinal cord injury, amputation and severe internal injuries. These often require long recovery and future care.
Insurance issues for riders
Many at-fault drivers carry only state minimums ($30,000/$60,000/$15,000 in California for policies issued or renewed since 2025; $25,000/$50,000/$15,000 in Arizona). Serious motorcycle injuries routinely exceed those limits. Your motorcycle policy's uninsured and underinsured motorist coverage may be the most important coverage in the case, along with any umbrella policy and the at-fault driver's employer's coverage.
Evidence to preserve
Photos of the scene, the bike and your gear (keep the helmet and gear, don't throw them away), the other vehicle's position, skid and scrape marks, witness names, nearby camera locations and the police report number. A reconstruction based on physical evidence is often what overcomes the "he came out of nowhere" defense.
How Eli handles motorcycle cases
Eli builds the case around the facts, not stereotypes: where the bike was, its speed, sight lines and what the driver should have seen. He documents the full extent of your injuries and future needs, and identifies every available insurance policy.
Motorcycle accident FAQ
Was lane splitting legal where I crashed?
California does not prohibit lane splitting. Arizona allows lane filtering only between stopped vehicles under specific conditions. Even legal riding can be argued as unsafe, so the facts of your ride matter.
I wasn't wearing a helmet. Can I still recover?
Usually yes. Helmet use may affect damages for head injuries, but it does not excuse the driver who caused the crash.
The driver says they didn't see me. Does that help them?
No. Drivers have a duty to look for and yield to motorcycles. "I didn't see him" is often an admission of not looking.
This page explains general rules of California and Arizona law. It is not legal advice, laws change, and every case depends on its own facts. Reading it or contacting the firm does not create an attorney-client relationship.
