Setareh Law
July 3, 2026
When you’re injured in a car accident caused by a driver who was breaking the law, you may have stronger legal leverage than you realize. California law recognizes a doctrine called negligence per se, which can significantly simplify the process of proving fault in your personal injury claim. Understanding how this legal principle works can make a big difference in the outcome of your case.
If you’ve been hurt in a crash involving a driver who ran a red light, was speeding, or was texting behind the wheel, Setareh Law can help you explore every legal avenue available to maximize your recovery. With over $250 million recovered for injured Californians and more than 60 years of combined experience, our attorneys approach every California car accident claim with the skill and determination it deserves. Knowing whether negligence per se applies to your situation can be the difference between a complicated legal fight and a far more direct path to compensation.
What Is Negligence Per Se?
In a standard negligence claim, your attorney must demonstrate that the at-fault party failed to act as a reasonably careful person would under the same circumstances. This often involves debating what a reasonable standard of behavior looks like, which can be both time-consuming and difficult to prove. Negligence per se removes much of that debate.
Under California Evidence Code Section 669, a person is presumed negligent when they violate a statute, ordinance, or regulation designed to prevent a specific type of harm, and that violation causes injury to someone the law was meant to protect. In practical terms, breaking a traffic law that leads directly to a crash establishes a presumption of negligence. You no longer need to argue that the driver behaved unreasonably because the violation itself does that work for you.
How Negligence Per Se Applies to Car Accidents
Car accidents are the most common setting for negligence per se claims, and for good reason. According to the California Office of Traffic Safety, there were 4,061 traffic fatalities in California in 2023 alone, with many crashes linked to traffic law violations. When a driver runs a red light, speeds in a school zone, or engages in distracted driving, they are violating statutes that exist specifically to prevent those exact types of crashes and injuries.
Since California’s Vehicle Code was created to protect all road users, any crash resulting from a violation of that code can trigger the negligence per se doctrine. If the law a driver broke was designed to prevent the kind of harm you suffered, the presumption of negligence applies, making it considerably easier to build a strong personal injury claim.
Four Elements Required for Negligence Per Se to Apply
Even when negligence per se applies, you can’t just point to a traffic violation and collect compensation. You must still establish four key elements for the doctrine to apply in your favor:
- The defendant violated a statute, ordinance, or regulation
- The violation caused the type of accident or injury the law was designed to prevent
- You belonged to the class of people the law was intended to protect
- The violation was a proximate cause of your injuries and resulting damages
Establishing all four elements is far more achievable with an experienced attorney on your side, particularly in serious cases that may involve catastrophic injuries or wrongful death.
Can the At-Fault Driver Challenge a Negligence Per Se Claim?
Yes, a presumption of negligence under California law is rebuttable, meaning that the at-fault driver has the opportunity to present evidence challenging it. They may argue that violating the law was reasonable under the specific circumstances, or that they made every effort to comply with the statute. However, overcoming a well-documented negligence per se claim is difficult, especially when police reports, traffic camera footage, and witness statements all support your version of events.
This is why working with an experienced attorney from the very beginning of your case is so important. Thoroughly documenting the violation and linking it directly to your injuries creates a record that is difficult for the defense to overcome.
Contact Setareh Law After a California Car Accident
Setareh Law is a California personal injury firm with over $250 million recovered for accident victims, more than 60 years of combined experience, and over 400 five-star Google reviews. Our attorneys understand how to build the strongest possible case for every client, including when negligence per se gives you a compelling legal advantage.
If you were injured in a crash caused by a driver who broke the law, don’t wait to seek legal guidance. Contact us today for a free consultation. We speak Spanish, have eight office locations to serve you, provide home visits when you can’t get to us, and you pay nothing unless we win your case.
