How to Read an Accident Police Report for a Personal Injury Claim

The police report is often the first document an insurance adjuster reviews when evaluating a personal injury claim. Understanding what each section of the report says — and what it does not say — allows you to identify favorable facts, anticipate the adjuster's arguments, and prepare to challenge incorrect notations before they harden into a settlement position.

Why the Police Report Matters

A police report is not legally binding on an insurer's fault determination, and a jury is not required to follow the officer's conclusions. But in practice, the police report sets the early narrative of the accident. An adjuster who opens a claim file and sees a police report attributing fault to the claimant will begin negotiating from that position. Challenging a police report's findings after a settlement has been made is significantly harder than challenging them before a settlement is even proposed.

Police reports also contain specific coded notations that directly translate into insurance industry fault models. Understanding the codes — and whether the officer applied them correctly — is essential to evaluating the claim's value before speaking with an adjuster.

Structure of a California Accident Report

California traffic collision reports use the CHP 555 form (used by CHP on state highways) or equivalent forms used by municipal police departments. The sections you need to understand:

• Party information panels: Each party to the collision — each driver, pedestrian, or cyclist — has a separate panel. These record name, address, driver's license, vehicle info, and insurance.
• Primary collision factor (PCF): The officer selects the single most significant cause of the collision. This is the closest thing to an official "fault" determination on the form. Common PCFs include "improper turning," "unsafe speed," "DUI," "failure to yield," and "following too closely."
• Vehicle code violation boxes: For each party, the officer can note specific California Vehicle Code sections violated, if any. The party to whom a violation is attributed will typically have that PCF box checked.
• Other associated factors: Secondary factors contributing to the collision beyond the primary one.
• Pedestrian/bicycle involvement: Specific coded fields for non-motorist involvement.
• Diagram: A rough overhead sketch of the collision showing vehicle positions, direction of travel, and point of impact.

Fault Notations and Violation Codes

The Primary Collision Factor is the single most important box in the report from an insurance claims perspective. If the PCF is attributed to a party, that party's insurer will treat it as a baseline fault indicator. Common PCF notations to look for in California accident reports:

• 21703 CVC: Following too closely (tailgating);
• 22350 CVC: Unsafe speed for conditions;
• 21658 CVC: Unsafe lane change;
• 21801 CVC: Failure to yield on left turn;
• 21802 CVC: Failure to yield at stop sign;
• 21950 CVC: Failure to yield to pedestrian in crosswalk;
• 22107 CVC: Unsafe turn signal (or lack thereof);
• 23152 CVC: DUI.

If a violation is attributed to the other driver and not to you, this is a strong starting position for your claim. If a violation is attributed to you — even incorrectly — the adjuster will use it to argue comparative fault and reduce the settlement offer. Challenging an incorrect Vehicle Code notation requires objective evidence contradicting the officer's finding.

The Narrative Section

The narrative is the officer's written description of the collision in their own words, typically one to several paragraphs. Key things to look for:

• Which witness statements are summarized and whether they are attributed to specific parties or to independent bystanders. Bystander witness statements carry more weight than party statements.
• What physical evidence is described — skid marks, debris, gouge marks, final rest positions — and whether the descriptions match the diagram.
• Any observations about party demeanor — odor of alcohol, slurred speech, confused behavior — that may have triggered DUI investigation or that simply document the other driver's condition at the scene.
• Errors or omissions in the officer's account of the sequence of events. Officers sometimes arrive after the fact and reconstruct the sequence from party statements — getting the wrong party's account as the basis for the narrative is not uncommon.

The narrative is the officer's opinion and interpretation, not objective fact. Witness statements, photographs, and physical evidence can contradict the narrative if the officer got the sequence wrong.

Challenging Errors in the Report

A police report can be supplemented or corrected through several mechanisms. The most direct is a written request to the investigating officer's supervisor with supporting evidence explaining the error. For traffic collision reports, the officer may amend the report or add a supplemental report if presented with evidence of factual error.

In litigation, the police report is often introduced as a business record, but the officer's opinions and conclusions within the report are subject to objection and cross-examination. If a case proceeds to trial, an accident reconstruction expert can contradict the officer's PCF determination based on physical evidence analysis independent of party statements.

In the claims phase, the most effective challenge to an unfavorable police report is objective third-party evidence: surveillance or dashcam footage, independent witness statements, and physical evidence photographs that support your account over the officer's narrative.