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How Is Fault Determined in Illinois Car Accidents?

Determining fault in an Illinois car accident can be complex, especially with comparative negligence laws and insurance investigations.

Determining fault after a car accident in Illinois is crucial because it affects insurance claims, liability, and potential compensation for damages. Illinois follows a fault-based system, meaning the driver responsible for the accident is liable for the resulting damages. But how exactly is fault determined, and what factors play a role in this process?

📞 If you’ve been in a car accident, Schierer & Ritchie, LLC can help protect your rights and fight for the compensation you deserve.
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Illinois is an At-Fault State

Illinois operates under an at-fault system, meaning that the driver who caused the accident is responsible for covering damages through their auto insurance policy.

  • After an accident, the injured party can:
    • File a claim with their own insurance company.
    • File a claim against the at-fault driver’s insurance.
    • File a personal injury lawsuit against the at-fault driver.

(Illinois Department of Insurance)

Legal Standards for Determining Fault

To determine fault, Illinois law relies on the concept of negligence. A driver is considered negligent if they fail to exercise reasonable care while driving, resulting in an accident.

To prove negligence, the following elements must be established:

  • Duty of Care: Every driver must legally operate their vehicle safely.
  • Breach of Duty: The driver failed to meet that duty (e.g., speeding, running a red light).
  • Causation: The breach directly caused the accident.
  • Damages: The accident resulted in losses such as medical bills, property damage, or pain and suffering.

(Illinois Pattern Jury Instructions – Civil, No. 10.01)

Comparative Negligence in Illinois

Illinois follows a modified comparative negligence rule under 735 ILCS 5/2-1116.

  • You can recover damages even if you are partially at fault if you are less than 50% responsible.
  • Your percentage of fault reduces your compensation.

Example:

  • If you are found 20% at fault and your damages are $100,000, you would receive $80,000.

(735 ILCS 5/2-1116)

Common Types of Evidence Used to Determine Fault

Determining fault often requires substantial evidence, including:

  • Police Reports: Official reports often include the officer’s assessment of fault.
  • Eyewitness Testimonies: Statements from those who saw the accident occur.
  • Surveillance Footage: Traffic cameras, dashcams, or security footage.
  • Accident Scene Photos: Photos of vehicle damage, skid marks, road conditions, and traffic signs.
  • Expert Testimony: Accident reconstruction experts can provide analysis and opinions.

(Illinois State Police Accident Report Guide)

Factors That Affect Fault Determination

Several factors are considered when determining fault, including:

  • Traffic Violations: Running a red light, speeding, or failing to yield.
  • Road Conditions: Weather, road construction, and poor signage.
  • Driver Behavior: Distracted driving, fatigue, or driving under the influence.
  • Vehicle Defects: Malfunctioning brakes or tire blowouts.

(National Highway Traffic Safety Administration (NHTSA)

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What Happens If Both Drivers Disagree on Fault?

If drivers disagree on fault, the case may involve:

  • Insurance Investigations: Each insurance company conducts its investigation.
  • Arbitration: A neutral third party reviews the evidence and decides fault.
  • Litigation: If no agreement is reached, the case may go to court, where a judge or jury determines fault.

(Illinois State Bar Association)

How Does Fault Impact Insurance Claims?

The at-fault driver’s insurance typically covers:

  • Medical expenses.
  • Property damage.
  • Lost wages.
  • Pain and suffering.

Your payout is reduced under comparative negligence rules if you are partially at fault. (Illinois Department of Insurance)

What to Do After an Accident to Protect Your Rights

To protect yourself and strengthen your case after an accident:

  • Call the Police to report the accident.
  • Document the Scene with photos and videos.
  • Exchange Information with all parties involved.
  • Seek Medical Attention even if injuries seem minor.
  • Contact a Car Accident Attorney to guide you through the legal process.

(American Bar Association)