Illinois Car Accident Laws: Complete Guide
Illinois is a traditional at-fault state with modified comparative negligence rules. Understanding Illinois's insurance requirements is essential for navigating Chicago's congested expressways and the state's extensive road network.
Illinois uses modified comparative fault with a 51% bar. If you're 51% or more at fault, you cannot recover any damages. At 50% or less, you can recover reduced damages.
Illinois Fault System
Modified Comparative Negligence (51% Rule)
Illinois follows modified comparative fault:
- Your recovery is reduced by your fault percentage
- If you're 51% or more at fault, you recover nothing
- If you're 50% or less at fault, you can recover
Examples:
- 25% at fault, $100,000 damages: Recover $75,000
- 50% at fault, $100,000 damages: Recover $50,000
- 51% at fault, $100,000 damages: Recover $0
Joint and Several Liability
Illinois modified joint and several liability:
- If you're less than 25% at fault: can collect full medical damages from any defendant
- Economic damages: joint and several if defendant is at least 25% at fault
- Non-economic damages: several only (proportionate)
How Fault Is Determined
Illinois considers:
- Police accident reports
- Witness testimony
- Physical evidence
- Traffic camera footage
- Illinois Vehicle Code violations
- Expert reconstruction (serious cases)
Illinois Insurance Requirements
Minimum Liability Coverage
Illinois requires (25/50/20):
- $25,000 bodily injury per person
- $50,000 bodily injury per accident
- $20,000 property damage per accident
Uninsured Motorist Coverage
Illinois requires UM coverage:
- $25,000 per person
- $50,000 per accident
- Cannot be waived for bodily injury
- Can waive property damage UM
Recommended Coverage Levels
Illinois minimums may be inadequate:
| Coverage Type | Minimum | Recommended |
|---|---|---|
| Bodily Injury | 25/50 | 100/300 or higher |
| Property Damage | $20,000 | $100,000 |
| Uninsured Motorist | 25/50 (required) | Match liability limits |
| Underinsured Motorist | Optional | 100/300 |
| Medical Payments | Optional | $5,000-$10,000 |
Illinois is one of the states that requires uninsured motorist coverage. You cannot reject it for bodily injury coverage, though you can reject UM property damage coverage in writing.
Illinois Statute of Limitations
Deadlines to File
| Claim Type | Deadline |
|---|---|
| Personal injury | 2 years from accident |
| Property damage | 5 years from accident |
| Wrongful death | 2 years from death |
| Government claims | 1 year from accident |
Government Claim Deadlines
Claims against Illinois government entities:
- State: 1 year statute of limitations
- Local governments: 1 year under Local Governmental and Governmental Employees Tort Immunity Act
- Notice requirements may be shorter
- Different procedures for state vs. local
Claims against government entities in Illinois have a 1-year deadline, shorter than the standard 2-year limit. Additionally, some local governments require notice within as little as 6 months.
Illinois-Specific Rules
Reporting Requirements
Illinois law requires:
- Report to police if injury, death, or $1,500+ damage
- File SR-1 with Secretary of State if required
- Exchange information at scene
- Remain at scene of injury accident
Cell Phone Laws
Illinois distracted driving law:
- No handheld phones while driving
- Texting while driving prohibited
- Hands-free devices allowed
- Under 19: no phone use at all
- Work zones: enhanced penalties
Seat Belt Law
Illinois seat belt requirements:
- Primary enforcement
- All occupants must be restrained
- Children under 8: appropriate child restraint
- Seat belt defense: jury can consider
Scott's Law (Move Over)
Illinois's Move Over law:
- Must move over for emergency vehicles
- Must slow down if can't move over
- Includes police, fire, EMS, tow trucks
- Also includes construction vehicles
- Enhanced penalties for violations
Special Illinois Situations
Chicago Area Accidents
Chicago presents unique challenges:
- Heavy congestion (I-90/94, I-290, I-55)
- Dan Ryan, Kennedy, Eisenhower expressways
- Complex interchange accidents
- CTA bus and train interactions
- Aggressive driving culture
Chicago Pedestrian and Bicycle Accidents
Urban Chicago issues:
- High pedestrian traffic
- Protected bike lanes
- Right hook accidents
- Dooring incidents
- Drivers must yield in crosswalks
Uninsured Drivers
Illinois requires UM coverage, but if at-fault driver is uninsured:
- File UM claim with your insurer
- Your UM coverage is mandatory
- Can sue driver personally
- May be difficult to collect
Rideshare Accidents
Uber/Lyft in Illinois:
- Chicago has specific TNC regulations
- App off: driver's personal insurance
- App on, no ride: limited coverage
- Ride in progress: $1M coverage
- File with appropriate policy
Commercial Vehicle Accidents
Illinois trucking accidents:
- I-80, I-55, I-57 are major trucking routes
- Commercial vehicle regulations apply
- Higher insurance minimums for trucks
- Multiple parties may be liable
- Chicago area has heavy truck traffic
Winter Weather Accidents
Illinois winter driving:
- Ice and snow common November-March
- Black ice on bridges
- Salt trucks create spray hazards
- See our Ice and Snow Accidents guide
Insurance Claims in Illinois
Step-by-Step Process
- Report accident to police (if required)
- Seek medical treatment if injured
- Report to your insurer within policy timeframe
- Document everything thoroughly
- Get repair estimates from multiple shops
- Review settlement offer carefully
- Negotiate or hire attorney if needed
Illinois Department of Insurance
IDOI can assist with:
- Claim disputes
- Unfair claim handling
- Rate questions
- Consumer complaints
- Bad faith allegations
Insurance Company Requirements
Illinois law requires insurers to:
- Acknowledge claims promptly
- Complete timely investigation
- Act in good faith
- Pay promptly after agreement
- Not engage in unfair practices
Government Entity Claims
Tort Immunity Act
Claims against Illinois government entities:
- Local Governmental Tort Immunity Act governs
- Many immunities and limitations
- 1-year statute of limitations
- May require notice (check local requirements)
Court of Claims
For state of Illinois claims:
- File in Court of Claims
- Special procedures apply
- Sovereign immunity limitations
- Damage caps may apply
Common Illinois Accident Scenarios
Expressway Accidents
Chicago-area expressways:
- Dan Ryan (I-90/94 south)
- Kennedy (I-90/94 north)
- Eisenhower (I-290)
- Stevenson (I-55)
- Edens (I-94 north)
Downstate Accidents
Illinois beyond Chicago:
- I-80 corridor
- I-55 to St. Louis
- I-57 south
- I-74 through Peoria
- Long rural stretches
Intersection Accidents
Illinois intersection rules:
- Right-of-way laws apply
- Red light cameras in some areas
- Uncontrolled intersections: yield to right
- Left turns must yield to through traffic
Illinois Accident Statistics
| Statistic | Number |
|---|---|
| Annual traffic fatalities | ~1,200 |
| Annual injuries | ~80,000+ |
| Most dangerous roads | I-90/94, I-290, I-55 |
| Highest-risk areas | Chicago metro |
| Pedestrian fatalities | 150+ annually |
Key Takeaways
- Illinois uses modified comparative fault with 51% bar
- At 51%+ fault, you recover nothing
- Minimum coverage is 25/50/20
- Uninsured motorist coverage is mandatory
- 2-year statute of limitations for injury claims
- Government claims have 1-year limit
- Scott's Law requires moving over for emergency vehicles
For more on Illinois driving hazards, see our guide on Illinois Dangerous Roads.