When two drivers are involved in a crash, figuring out who was at fault is not always straightforward. Each person may have a different version of what happened, and both may believe the other driver caused the collision. In these situations, the outcome often depends on the evidence available, including police reports, witness statements, photos, traffic laws, vehicle damage, and other details from the scene.
The consequences can be serious. Data from the NSC shows that 4.9 million people required medical attention after vehicle crashes in 2024, accumulating an estimated $559.3 billion in total injury costs. These costs cover everything from wage and productivity losses to medical expenses, property damage, administrative fees, and employer costs.
When both drivers blame each other, understanding how fault is determined can help make sense of what happens next. Looking at the available evidence and the circumstances leading up to the crash can help establish which driver’s actions contributed to the accident.
The Role of the Police Report
When officers arrive at a crash scene, they document key details such as driver statements, road conditions, weather, and vehicle damage in an official report. Physical evidence gathered at the scene, such as skid marks and vehicle positions, can help create a more objective account based on evidence rather than conflicting recollections.
Although a police report does not make the final legal determination of fault, insurance companies may consider it when investigating a claim. A traffic citation or finding that a driver ran a red light can also significantly influence how an insurer assesses responsibility.
If you need a copy of the report, the process can vary by location. For example, in California, eligible parties, including drivers, passengers, and insurance representatives, can request a CHP crash report online through the Crash Portal. Eligible parties can also request a copy in person or by mail by submitting a completed CHP 190 form to the appropriate CHP Area office.
Evidence That Speaks for Itself
When two drivers give conflicting accounts, evidence beyond the police report can help clarify what happened. Dashcam footage, traffic cameras, and videos from nearby businesses may show the moments before the crash. Vehicle damage can also reveal the direction and force of impact, while event data recorders may capture speed, braking, and steering inputs just before a collision.
Investigators may also examine phone-related evidence when distracted driving is suspected. According to Loewy Law Firm, this can include carrier records that match calls or messages to the time of impact, as well as app activity and screen-time logs. It can also include infotainment system data showing device pairing or screen interaction and event data recorder downloads.
Laws for distracted driving vary by state and may prohibit texting or handheld phone use. If evidence shows that a driver was distracted, it can significantly affect how fault is assessed, even when the drivers give different accounts of the crash.
Witness Statements and Independent Accounts
Eyewitnesses who saw the crash unfold, but who have no personal stake in the outcome, are often considered more credible than the drivers themselves. Pedestrians, passengers, or people in nearby vehicles can offer details that corroborate or contradict either driver’s version of events.
Insurance investigators may contact witnesses to obtain statements and compare their accounts with other evidence, such as the police report, photographs, or video footage. A single witness statement can be helpful, but consistent accounts from several independent witnesses may carry more weight.
However, witness accounts are not automatically considered conclusive. Investigators may also consider the person’s location, visibility, distance from the crash, and ability to accurately observe what happened when assessing the reliability of their statement.
Comparative and Contributory Negligence
Not every accident has a single driver who is completely responsible. Most states use some form of comparative negligence, which allows fault to be divided based on each driver’s actions. Under pure comparative negligence, used in states such as California and New York, you can recover damages even if you are 99% responsible. However, your recovery is reduced by your percentage of fault.
Conversely, a few jurisdictions follow contributory negligence. According to Justia, this strict “all-or-nothing” rule can bar you from recovering damages if you are even 1% at fault. For example, if you are 10% responsible for $200,000 in damages, you could recover nothing. This system remains in Alabama, Maryland, North Carolina, Virginia, and Washington, D.C.
The “last clear chance” doctrine can sometimes provide an exception if the defendant had the final opportunity to avoid the crash.
The Insurance Company’s Investigation
Ultimately, insurance companies make an initial assessment of fault after a crash. Claims adjusters review the available evidence to determine how responsibility may be divided between the drivers.
According to Penny Gusner, a U.S.-based insurance analyst, insurers want details about the accident, including whether a police report was filed and whether there were witnesses. They may also consider other information relevant to the crash.
If the two insurance providers disagree about liability, they may negotiate directly with each other. Unresolved disputes can sometimes escalate to formal arbitration or a lawsuit. Providing photos, a written account, and witness contact information can support your version of events and help adjusters evaluate your claim.
FAQs
How do insurance companies determine who is at fault in a car accident?
Insurance adjusters review the available evidence, including police reports, photographs, vehicle damage, witness statements, traffic citations, and camera footage. They may also consider information about distracted driving or other traffic violations. If both drivers share some responsibility, the applicable negligence rules may determine how fault and compensation are divided.
What happens when both drivers are found partially at fault?
The outcome depends on the negligence laws in the state where the accident occurred. Under comparative negligence, a driver’s compensation may be reduced based on their share of fault. In states that follow contributory negligence, even a small degree of fault may prevent an injured person from recovering damages.
What evidence can help prove who was at fault in a car accident?
Useful evidence can include police reports, photographs of the scene and vehicle damage, dashcam or traffic-camera footage, witness statements, traffic citations, and vehicle data. When distracted driving is suspected, phone records, app activity, and infotainment-system data may also help establish what a driver was doing before the crash.
Key Statistics at a Glance
| Medically consulted motor-vehicle injuries in 2024 | 4.9 million |
| Total motor-vehicle injury costs in 2024 | $559.3 billion |
| Fault that can potentially bar recovery under contributory negligence | 1% |
| Fault under pure comparative negligence that can still allow recovery | 99% |
| States/jurisdictions still using contributory negligence | 5 |
When both drivers blame each other after a crash, determining fault often requires looking at the full picture. Police reports, physical evidence, witness statements, camera footage, and applicable traffic laws, including laws addressing distracted driving, can help establish what happened.
If you are involved in a disputed accident, gather photos, witness information, and other evidence at the scene when it is safe to do so. Keep copies of relevant documents and cooperate with the claims process. If the dispute becomes complicated or involves significant injuries or damages, speaking with an experienced attorney can help you understand your options and protect your interests.
