Jackknife Truck Accident Causes and Liability in California: Complete Guide

Jackknife Truck Accident Causes and Liability in California

A jackknife accident occurs when a large commercial truck’s trailer swings out to one side as the vehicle continues forward, resembling a closing pocket knife in a “V” shape. This is an incredibly dangerous type of accident for several reasons. Primarily, when a truck jackknifes, it is incredibly difficult for the truck driver to regain control over the vehicle. Additionally, the trailer could collide with multiple other vehicles.

A truck may jackknife if the truck driver suddenly brakes. The momentum of the trailer causes it to continue forward, swinging out to one side. A truck driver could jackknife if they are negligent in managing their speed or if they suddenly brake at the last moment when they notice a hazard in the road. If you are injured in this type of accident, you will need to prove the cause of the accident before you can claim any compensation for your damages.

According to the National Safety Council, there were 5,218 large trucks involved in fatal crashes nationwide in 2024. That same year, 120,724 large trucks were involved in injury crashes. Whenever a large commercial truck crashes into a smaller passenger vehicle, the occupants of that smaller vehicle face a very high risk of catastrophic or fatal injuries.

Recovering Compensation for a Jackknife Truck Accident

In California, all vehicle accidents are resolved on a fault basis when multiple parties are involved. If you were hurt in a jackknife accident, you will need to prove the cause of the accident, identify the party or parties responsible, and then prove the damages you suffered from the accident. Liability could fall to the driver of the truck, but their employer could be vicariously liable for the accident under certain conditions.

A California jackknife accident attorney can gather the evidence needed to establish fault for the accident, and they can determine whether vicarious liability applies and whether the truck driver’s employer bears fault for their driver’s actions. For example, if the company did not follow vehicle maintenance regulations and this contributed to the jackknife accident, but the driver was negligent in their handling of the truck, vicarious liability is likely to apply to the employer.

Once you establish fault, your attorney can help you claim compensation for the damages you suffered. In most vehicle accident cases, injured victims are eligible to claim compensation for their economic and non-economic damages, which may include vehicle repair costs, medical expenses, lost wages, and the pain and suffering they experienced. These accidents can be tremendously damaging, so you may have grounds to claim substantial compensation.

Whether a recent jackknife accident resulted from truck driver negligence or some type of regulatory noncompliance, you need to hire a jackknife accident lawyer you can trust to help you with your case. Bentley & More LLP has assisted many truck accident victims in California with difficult cases, and we’ll apply this experience to your case. Reach out to our firm as soon as possible after your accident to learn how we can help.

FAQs

How Do You Prove Fault for a Jackknife Accident?

Proving fault for a jackknife accident could require physical and digital evidence that an experienced California jackknife accident attorney will know how to obtain. You may need the truck’s black-box data, witness statements, trucking company records, and other evidence that you will not know how to obtain on your own. Hire a jackknife accident lawyer as soon as possible after the accident so they can start gathering this evidence right away.

When Is Jackknifing Most Likely to Occur?

Jackknifing is most likely to occur when road conditions are poor and when the truck driver does not exercise reasonable care. Some of the most commonly cited contributing factors for these accidents include slippery road surfaces, excessive speed, taking turns too fast, and overloaded trailers. Your California jackknife accident attorney can gather the evidence you need to prove what caused your recent jackknife accident.

How Much Compensation Can I Claim in a Jackknife Truck Accident Case?

The amount of compensation you can claim in a jackknife truck accident case depends on several factors, such as the severity of your injuries and whether liability for the accident is contested in any way. An experienced California jackknife accident attorney can help you prove liability for the accident and calculate claimable damages, such as vehicle repair costs, medical bills, lost wages, and the pain and suffering you experienced.

Is a Trucking Company Liable for Its Driver’s Negligence?

A trucking company could be liable for its driver’s negligence under certain conditions. Vicarious liability can come into play in these cases when the facts show that the company contributed to causing the accident in question somehow. For example, if the company neglected to enforce trucking industry regulations and this noncompliance contributed to the accident, vicarious liability is likely to apply, and the company will share fault for the resulting damages.

Why Should I Hire a Jackknife Accident Lawyer?

You should hire a jackknife accident lawyer because these cases often entail significant damages and raise difficult questions of liability. You should hire an attorney who has experience handling these cases and who understands the specific California laws that apply to your situation. You are more likely to achieve a favorable outcome in your case with an attorney representing you.

Speak to Our Truck Accident Lawyer

The personal injury attorney at Bentley & More LLP is ready to assist you with every step of your legal proceedings after a jackknife accident in California. We have an extensive record of successful representation in many difficult truck accident claims, and we’re confident we can guide you to a positive outcome in your case. Contact us today to schedule a free consultation with a California jackknife accident attorney you can trust.

About the author: Greg Bentley

Co-Founder & Trial Lawyer at Bentley & More LLP

Greg Bentley is Co-Founder of Bentley & More LLP in Newport Beach, California. With 36 years of experience, he represents plaintiffs in personal injury, wrongful death, product liability, insurance bad faith, dangerous road and property conditions, and construction-site failure cases. Admitted to the State Bar of California, Greg earned his J.D. from Western State University College of Law in 1990. He is a member of several invitation-only trial organizations, including the American College of Trial Lawyers and the International Academy of Trial Lawyers, and is active in multiple statewide and regional trial lawyer associations.

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