Injury Guides

Blamed for a California motorcycle accident? What to preserve when fault is disputed

The Masjedian Law Firm · October 30, 2026

Being blamed does not settle the question of fault. Focus on evidence showing how the collision happened: vehicle movements, lane positions, visibility, available video, and witness observations. Lane splitting is legal in California, but that alone does not determine who caused a particular crash.

Lane splitting is not automatic fault—or automatic protection

The California Highway Patrol confirms that motorcycle lane splitting is legal. Its safety guidance also emphasizes the surrounding conditions and warns that risk increases with overall speed and the speed difference between vehicles. Riding on the shoulder is not lane splitting. See the CHP's motorcycle safety guidance.

In a disputed collision, an attorney may need to examine whether a driver changed lanes, whether the rider had space to react, and what each person could reasonably see. Avoid reducing the dispute to a single label such as “lane splitting” or “the driver didn't see me.” Those descriptions leave important factual questions unanswered.

What if both people contributed to the crash?

California's comparative-fault framework can reduce a plaintiff's damages by the percentage of responsibility assigned to that plaintiff. Judicial Council instruction CACI 405, reproduced by Justia, requires proof that the plaintiff was negligent and that this negligence substantially contributed to the harm. An accusation alone does not establish that percentage.

For a simple illustration, if damages were $100,000 and the rider were found 20% responsible, a comparative-fault reduction would leave $80,000 before other applicable limits, fees, costs, or deductions. This is arithmetic, not a case valuation or promised result.

Drivers also have a duty to use reasonable care, including maintaining a lookout and controlling their vehicles. See Judicial Council instruction CACI 700, reproduced by Justia. How that standard applies depends on the evidence and circumstances.

Preserve evidence that answers the disputed questions

• Vehicle movement: Save original helmet-camera or dash-camera files, including footage before and after impact. Do not keep only an edited clip. Note nearby businesses or vehicles that may have cameras; do not assume a camera recorded or retained the collision.
• Lane position and visibility: Preserve photographs of lane markings, intersections, obstructions, road conditions, and vehicle damage. Do not return to an unsafe location to take pictures.
• Witness observations: Keep names and contact information. Record what a witness actually said rather than adding your interpretation. Do not coach anyone's account.
• The motorcycle and gear: Photograph and retain the motorcycle, helmet, and damaged protective clothing where practical. Discuss inspection and preservation before authorizing disposal or repairs that could alter evidence; address towing and storage charges promptly as well.
• Reports and correspondence: Save the police report number, insurer letters, diagrams, and messages. If a report contains a specific factual error, identify the error and supporting evidence for your attorney.
• Injuries and losses: Keep treatment records, bills, and work-loss documentation. Describe symptoms accurately and follow up with your healthcare provider about care.

When an insurer says you were at fault

Ask for the explanation in writing and identify what facts the insurer relied on. Keep the response with your claim records. Write a separate timeline distinguishing what you remember from what you learned later, and mark uncertain details instead of guessing.

Before giving a detailed recorded account, identify which insurer is asking and the purpose of the request. Do not ignore your own insurer's cooperation requirements. Our recorded-statement guide explains questions to ask before responding.

Bring the dispute and the documents to a consultation

You do not need a complete investigation before asking for help. Bring the insurer's fault explanation, policy information, photographs, report number, and any video you have. Explain what evidence may exist elsewhere so its preservation can be considered promptly.

Learn about the firm's motorcycle accident representation. If the other driver may lack coverage, see the uninsured-driver guide.

General information, not legal advice. Fault, coverage, deadlines, and recoverable damages depend on the facts. Contacting the firm does not create an attorney-client relationship or extend a deadline.