How Is Liability Determined After an Illinois Car Accident?
Published: Aug 28, 2026 in Auto Accident
Key Takeaways:
- Illinois uses a āmodified comparative negligenceā rule that allows recovery if a driver is 50% or less at fault.
- āFaultā is determined using police reports, witness statements, traffic camera footage, and physical evidence from the crash scene.
- Insurance companies often dispute fault to reduce payouts, making documentation critical.
- Belleville car accident lawyers can investigate a crash and build the evidence needed to establish liability.
After a car accident in Illinois, liability is determined by reviewing police reports, physical evidence, and witness statements to establish which driver failed to follow traffic laws or acted carelessly. Illinois law allows an injured driver to recover damages as long as they are not more than 50% at fault for the crash.
What Determines Fault in an Illinois Car Accident?
āFaultā in a car accident case comes down to ānegligence,ā meaning a driver failed to act with reasonable care and caused harm as a result. Common examples include:
- Running a red light
- Following too closely
- Failing to yield
- Distracted driving
Investigators and insurance adjusters typically review:
- The police report
- Traffic citations issued at the scene
- Skid marks and vehicle damage
- Video footage from nearby businesses or traffic cameras
Statements from the drivers and witnesses are also compared for consistency, since conflicting accounts often signal that further investigation is needed. In Belleville and the surrounding area, evidence from intersections along roads such as Illinois Route 15 or North Belt West often plays a role in reconstructing how a crash occurred, particularly in cases involving left-turn collisions or rear-end accidents at busy signals.
How Does Illinois’ Comparative Negligence Law Affect Your Claim?
Under Illinois law (735 ILCS 5/2-1116), the state follows a āmodified comparative negligenceā rule. A driver can recover compensation as long as they are found to be 50% or less at fault for the crash. If a driver is found more than 50% responsible, they are barred from recovering any damages, regardless of how serious their injuries may be. When fault is shared, the final award is reduced by the injured driver’s percentage of fault.
Insurance companies are often aware of this rule and may try to assign a higher percentage of fault to the injured driver to reduce or eliminate the amount they owe. It is up to you to fight back against wrongful allegations with the help of a car accident lawyer.
What Evidence Helps Prove Liability After a Belleville Car Accident?
Strong evidence is often the difference between a denied claim and a fair settlement. Useful evidence includes the official police crash report, photographs of the vehicles and accident scene, medical records connecting injuries to the crash, cell phone records showing possible distracted driving, and statements from independent witnesses.
Gathering this evidence quickly matters, since surveillance footage is often deleted within days and vehicles may be repaired or scrapped before they can be inspected. Since you may not be in a position to investigate your own accident and collect proof when you are injured, you should contact a car accident lawyer immediately after the crash.
Frequently Asked Questions (FAQs):
Does the police report decide who is at fault?
A police report is strong evidence, but it does not automatically determine fault. Insurance companies and courts weigh the report alongside other evidence before assigning liability.
Can more than one driver be held liable for a crash?
Yes. Illinois law allows fault to be divided among multiple parties, including drivers, employers, or government entities responsible for road maintenance.
What if the insurance company disputes my percentage of fault?
A lawyer can gather additional evidence, such as accident reconstruction or expert testimony, to challenge the insurance company’s fault assessment.
Our Skilled Belleville Car Accident Lawyers at The Cates Law Firm Will Fight for You if You Have Been Injured in an Accident So You Can Get the Compensation You Deserve
Our Belleville car accident lawyers at The Cates Law Firm work to establish liability and pursue fair compensation after your crash. However, you need to contact us immediately to schedule your free consultation, so we can be at our most effective. Call today at 618-277-3644 or submit our online contact form. Located in Swansea, Illinois, we proudly serve clients in the surrounding areas.