Who Is Responsible for a Jackknife Truck Accident in Illinois?

 Posted on November 30, 2025 in Truck Accidents

When a semi-truck swings sideways across a highway, it can block several lanes within seconds. This is called a jackknife accident, and they are among the most dangerous collisions on Illinois roads. They often cause pileups, serious injuries, and even deaths. Figuring out who is responsible is not always simple, but our Bloomington, IL truck accident lawyers can help.

What Does It Mean for a Truck To Jackknife?

A truck jackknife happens when the trailer swings out from behind the cab at a sharp angle, creating an "L" or "V" shape. It looks like a folding knife snapping shut. This usually occurs when the truck loses traction or balance. Common causes include sudden braking, turning too fast, or driving too quickly for the weather. Once a heavy trailer begins to skid, it can push the cab sideways, and the driver may lose all control.

Who Can Be Held Liable for a Jackknife Accident in Illinois?

More than one party can be responsible for a jackknife crash. Truck drivers must follow Illinois safety laws and drive at speeds that fit conditions. For example, under 625 ILCS 5/11-601, drivers must slow down when traffic, road, or weather conditions make driving dangerous. If a truck driver ignores this rule or breaks any other traffic law, they can be considered negligent. However, the trucking company can also share responsibility. Companies that fail to train drivers properly, skip safety checks, or pressure employees to meet unrealistic deadlines may be held accountable.

Fault can also come from poor truck maintenance or defective parts. If a brake system fails or tires are worn down, the truck may jackknife even if the driver reacts correctly. Illinois law requires all trucks to have safe and working brakes under 625 ILCS 5/12-301. If a maintenance company or parts manufacturer ignored safety rules, they may also be legally responsible.

Illinois law allows multiple parties to share fault through the Joint Tortfeasor Contribution Act. This law means that if more than one person or company caused the crash, each can be required to pay their share of the damages.

What Evidence Helps Prove Fault in a Jackknife Truck Crash?

Since jackknife crashes often involve many vehicles, investigators look at every detail to determine how it happened. Important evidence may include:

• Dashcam or traffic camera video of the crash

• Electronic logging device (ELD) indicating/ showing hours and speed of impact

• Police and accident reconstruction reports

• Maintenance and inspection records

• Statements from witnesses or other drivers

Trucking companies and insurers often start their own investigations right away, and they may try to protect themselves. Having an attorney ensures your side of the story is documented and supported by facts.

Can Weather and Road Conditions Affect Liability in a Truck Jackknife Accident?

Illinois weather can change fast. Snow, rain, and ice can make roads slippery and dangerous. These conditions increase the risk of jackknife accidents. Poorly maintained roads, sharp curves, or potholes can also play a part.

However, bad weather does not excuse careless driving. Drivers are expected to slow down, leave more space between vehicles, and use caution when the road is slick. If they fail to do so, they can be held responsible for a crash. Trucking companies also have duties. They must prepare their vehicles for poor weather by using the right tires and maintaining their brakes. If they do not, they can share the blame.

In some cases, local or state governments may also bear limited responsibility if unsafe road design or lack of maintenance played a role. A detailed investigation helps identify all contributing factors.

Schedule a Free Consultation With a Peoria, IL Truck Accident Attorney

At Kanoski Bresney, our legal team has over 100 years of combined experience representing people injured in serious truck and car crashes across Central Illinois. Attorney Todd Bresney offers unique insight to every case, having previously worked for both the Federal Trade Commission and the Cook County State’s Attorney’s Office. His background in government and litigation helps our firm build strong, evidence-based claims for clients.

Call our Bloomington, IL truck accident lawyers today at 888-826-8682 to schedule a free consultation.