Key Takeaways
- Four elements. Duty, breach, proximate cause and damages. All four, or the claim fails.
- Illinois has no negligence per se for traffic violations. A violation is prima facie evidence of negligence, and it is rebuttable.
- Proximate cause is where cases are actually lost, not duty, which is rarely in dispute between two drivers.
- Your own negligence reduces rather than defeats, unless your share exceeds 50%.
- Two years for injury, but not always. One year against a local public entity.
What you have to prove
An Illinois car accident claim is a negligence claim, and negligence has four elements. They are worth separating, because people tend to argue about the wrong one.
| Element | What it means | Usually disputed? |
|---|---|---|
| Duty | A driver owes other road users reasonable care | Rarely, between two drivers |
| Breach | They fell short of that standard | Often |
| Proximate cause | The breach caused this injury | Very often, and this is where claims fail |
| Damages | Actual loss, proved rather than asserted | Almost always, as to amount |
The rule most articles get wrong
You will often read that if the other driver broke a traffic law, negligence is established. In Illinois that is not correct, and the distinction is not academic.
Illinois does not apply negligence per se to traffic violations. Under the Illinois Pattern Jury Instructions, following Davis v. Marathon Oil Co., 64 Ill. 2d 380 (1976), a violation of a statute designed to protect human life or property is prima facie evidence of negligence.
The practical difference is real:
- Under negligence per se, which some other states apply, the violation would settle the question of breach.
- Under the Illinois rule, the violation is strong evidence that the other side may rebut with an explanation or excuse, and it does not touch causation at all.
So a citation is a very good thing to have and it is not the end of the argument. How that plays out in practice is covered in how fault is decided.
Proximate cause, the element that decides cases
Duty between two drivers is almost never seriously contested. Breach is often admitted in substance. The fight is usually about causation, and specifically about whether this crash caused this injury.
The recurring arguments are predictable:
- Pre-existing conditions. The insurer says the degeneration was already there. Illinois law does not require a plaintiff to have been in perfect health, but the argument still has to be met with evidence.
- Gaps in treatment. A delay between the crash and the first medical visit is used to suggest the injury came from somewhere else.
- Low property damage. Modest visible damage is offered as proof that no one could have been hurt.
Notice that all three are answered by medical records rather than by crash evidence. That is why consistent, documented treatment matters as much to a claim as anything that happened on the road.
Your own negligence
Illinois uses modified comparative negligence. Under 735 ILCS 5/2-1116 your damages are reduced by your share of the fault, and barred only where that share is more than 50%. At exactly 50% you still recover half. The full explanation, with worked figures, is in the Illinois 51% fault rule.
Where more than one defendant is at fault, 735 ILCS 5/2-1117 governs which of them can be pursued for the whole judgment, and 740 ILCS 100/2 allows those found liable to seek contribution from each other. See multi-vehicle crash claims.
Deadlines
A negligence claim for personal injury runs two years under 735 ILCS 5/13-202. Two departures matter more than the general rule:
- One year where a local public entity or its employee is a defendant, under 745 ILCS 10/8-101(a).
- A minor generally has two years from turning 18, under 735 ILCS 5/13-211(a).
Property damage alone runs on a different period, five years under 735 ILCS 5/13-205, which is why a vehicle claim can survive after an injury claim has expired. Full detail is in the Illinois car accident filing deadlines.
Preguntas frecuentes
What do I have to prove in an Illinois car accident claim?
Four elements: that the other driver owed you a duty of reasonable care, that they breached it, that the breach proximately caused your injury, and that you suffered actual damages. All four are required. Duty is rarely disputed between two drivers, while proximate cause is where claims most often fail.
Is a traffic violation negligence per se in Illinois?
No. Illinois treats a violation of a statute designed to protect human life or property as prima facie evidence of negligence, following Davis v. Marathon Oil Co., 64 Ill. 2d 380 (1976). The other side may rebut it with an explanation or excuse, and it does not establish proximate cause, which must be proved separately.
What is proximate cause?
It is the requirement that the defendant’s breach actually caused the injury you are claiming for. It is a separate element from breach, so proving that a driver broke a rule of the road does not by itself prove that breaking it caused your injury.
Can I still claim if I was partly negligent?
Yes, unless your share was more than 50%. Under 735 ILCS 5/2-1116 your damages are reduced in proportion to your share of the fault, and barred entirely only above that line. At exactly 50% you still recover half.
Does a pre-existing condition defeat my claim?
Not automatically, though insurers argue it frequently. Illinois law does not require an injured person to have been in perfect health before the crash. The argument is met with medical evidence distinguishing the prior condition from what the crash caused, which is why consistent documented treatment matters.
How long do I have to bring a negligence claim?
Generally two years for personal injury under 735 ILCS 5/13-202, but only one year where a local public entity or its employee is a defendant under 745 ILCS 10/8-101(a). A minor generally has two years from turning 18 under 735 ILCS 5/13-211(a). Damage to property alone runs for five years under 735 ILCS 5/13-205.
Talk to an Elmwood Park car accident lawyer
Most people preparing a claim concentrate on proving the other driver did something wrong. That is usually the element least in dispute. The work that decides the case is proving that the crash caused this injury, and proving what the injury is worth.
If you were hurt in a crash in Elmwood Park, Oak Lawn, Skokie, Niles, Orland Park or anywhere in Cook County, Lawyer Furqan will build the causation and damages evidence alongside the liability evidence, not after it.
Call 847-800-8978 or contact us online. The consultation is free, there is nothing upfront, and you owe no attorney’s fee unless we win.
Sources and authorities cited
- Illinois Pattern Jury Instructions, Civil, 60.00 · statutory violation as prima facie evidence of negligence, citing Davis v. Marathon Oil Co., 64 Ill. 2d 380 (1976)
- 735 ILCS 5/2-1116 · comparative negligence; 735 ILCS 5/2-1117 · apportionment; 740 ILCS 100/2 · contribution
- 735 ILCS 5/13-202 · two years for personal injury; 735 ILCS 5/13-205 · five years for injury done to property; 735 ILCS 5/13-211 · minors; 745 ILCS 10/8-101(a) · one year against a local public entity
This article is general legal information about Illinois law, not legal advice, and creates no attorney-client relationship. Whether the elements of negligence are met depends on the evidence in each case, and nothing here predicts a result.
