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What Causes Most Truck Accidents in Illinois?

August 26, 2026

Key Takeaways

  • Most truck crashes trace back to a rule, not to bad luck. Each common cause maps to a federal regulation that Illinois has adopted as state law.
  • Fatigue rules bind the company too. A carrier may not require or permit a driver to drive whose alertness is impaired, or likely to become impaired.
  • Every rule generates a record, which is why cause and evidence are the same question in a truck case.
  • Maintenance records are thin by design. Carriers must keep certain vehicle records covering only the last 30 consecutive days.
  • You recover if your share of the fault is 50% or less, reduced in proportion. Only more than 50% bars you.
  • Two years to sue, and one year if a public body is among the defendants.

The short answer

The causes that produce most serious truck crashes are not mysterious: fatigue, an unfit or undertrained driver, impairment, poor maintenance, unsecured or badly distributed cargo, and speed for the conditions. What matters legally is that each of those already has a rule attached to it.

Illinois has adopted the federal safety regime as state law through 625 ILCS 5/18b-105(b), which takes parts of Title 49 of the Code of Federal Regulations “by reference as though they were set out in full.” So asking what caused a truck crash is usually the same as asking which rule was broken and what record proves it.

Semi-truck traveling on a road in winter conditions

Causes, and the rule each one breaks

Cause Rule Record it creates
Driver fatigue 49 CFR 392.3 and 395.3 Electronic logs, dispatch records, fuel and toll receipts
Unfit or unqualified driver 49 CFR 391.51 The driver qualification file
Alcohol or drug impairment 49 CFR Part 382 Testing records, including post-accident testing
Brake and mechanical failure 49 CFR 396.3 Inspection, repair and maintenance records
Unsecured or shifting cargo 49 CFR Part 393 Loading records, and often a separate company
Speed and following distance 625 ILCS 5 and 49 CFR Part 392 Engine control module data and telematics

Fatigue, and why it is the company’s problem too

People assume fatigue is the driver’s failing. The regulation says otherwise, and its wording is the most useful sentence in this whole area.

49 CFR 392.3 provides that no driver shall operate a commercial motor vehicle, “and a motor carrier shall not require or permit a driver to operate a commercial motor vehicle,” while the driver’s ability or alertness is “so impaired, or so likely to become impaired, through fatigue, illness, or any other cause,” as to make it unsafe to begin or continue driving.

Two features do the work. It binds the carrier, not only the driver. And it reaches alertness that is “likely to become impaired,” which is forward looking, so a schedule that could only be met by driving tired is inside the rule before anyone gets behind the wheel.

Alongside it, 49 CFR 395.3 sets the hard limits: 10 consecutive hours off duty before driving, no driving after 14 consecutive hours on duty, 11 hours of driving inside that window, a 30-minute interruption before exceeding 8 hours of driving time, and weekly caps of 60 hours in 7 days or 70 hours in 8 days where the carrier runs every day.

The driver the carrier chose

Row of tractor units parked at a truck stop

Where a driver should never have been in the cab, the claim is against the company that put them there. 49 CFR 391.51 requires a qualification file for every driver containing the employment application, the motor vehicle record from each licensing authority, the road test certificate or accepted equivalent, the annual driving record inquiry, a note of the annual review of that record, and the medical examiner’s certificate.

That file answers questions no crash scene can: what the carrier knew about this driver’s history, whether it checked, and whether it kept checking.

The annual obligations are the ones carriers most often fall short on. The file must hold the motor vehicle record obtained from each licensing authority in response to the annual inquiry, and a note recording the annual review of that record. A carrier that hired carefully in year one and never looked again has a gap that is visible on the face of its own paperwork, and it is the gap that supports a negligent retention claim rather than a negligent hiring one.

Maintenance, and a records window that closes fast

49 CFR 396.3(a) requires every motor carrier to “systematically inspect, repair, and maintain” all vehicles under its control, and provides that parts and accessories “shall be in safe and proper operating condition at all times,” expressly including frames and frame assemblies, suspension systems, axles and attaching parts, wheels and rims, and steering systems.

The retention detail matters more than it first appears. Under 396.3(b), carriers must maintain records for each vehicle they control covering 30 consecutive days. A maintenance history obtained months later may simply not exist in the form you need, which is an argument for a preservation request rather than a records request.

Cargo is often a different defendant

Shifting, overloaded or unsecured cargo behaves differently from any other cause, because the party that loaded the trailer is frequently not the party driving it. Part 393 governs parts and accessories necessary for safe operation, including cargo securement, and it is Illinois law through 18b-105.

Practically, a cargo case means identifying the shipper, the loader and any broker as well as the carrier, and each additional defendant carries its own limitation analysis. Who ends up paying is a separate question from who was driving, which we cover in who pays when a truck driver causes a crash.

Why the physics matter to the legal question

Two features of a heavy vehicle explain why the same driver error produces a far worse outcome, and why the rules above are written the way they are.

Stopping distance. A loaded combination vehicle needs substantially more distance to stop than a car at the same speed, and that gap widens on wet or icy surfaces. Following distance and speed for the conditions are therefore not incidental to a truck case; they are frequently the whole of it.

Mass and geometry. A federal combination can run to 80,000 pounds, so occupants of the smaller vehicle absorb most of the energy. Trailer length also creates the underride and wide-turn collisions that have no equivalent in a car-to-car crash.

For an injured person the consequence is practical rather than theoretical: injuries in these cases tend to be severe, which raises the value of the claim past the limits of an ordinary policy and makes identifying every responsible party, and every applicable insurance layer, part of the investigation rather than an afterthought.

What a broken rule proves

Not liability by itself. In Illinois, violating a statute designed to protect life or property is prima facie evidence of negligence, it can be rebutted, and proximate cause still has to be proved. That comes from Davis v. Marathon Oil Co., 64 Ill. 2d 380 (1976), reflected in IPI Civil 60.01, and we go through it in whether a truck citation wins your case.

If you were partly at fault

Under 735 ILCS 5/2-1116, you recover as long as your share of the fault is 50% or less, with damages reduced in proportion. Recovery is barred only where your fault is more than 50%, so a finding of exactly half still pays half.

Your deadline is two years under 735 ILCS 5/13-202, and one year under 745 ILCS 10/8-101(a) where a local public entity or its employee is a defendant, which happens more often than people expect where a municipal or transit vehicle is involved.

Frequently Asked Questions

What causes most truck accidents?

The recurring causes are driver fatigue, an unfit or unqualified driver, alcohol or drug impairment, poor maintenance and brake failure, unsecured or shifting cargo, and excessive speed for the conditions. Each of those already has a federal regulation attached to it, and Illinois has adopted those regulations as state law through 625 ILCS 5/18b-105.

Is the trucking company responsible for a fatigued driver?

It can be. Under 49 CFR 392.3 a motor carrier shall not require or permit a driver to operate a commercial motor vehicle while the driver’s alertness is so impaired, or so likely to become impaired, through fatigue or illness, as to make driving unsafe. The rule reaches the schedule as well as the driver.

What are the federal hours-of-service limits?

Under 49 CFR 395.3 a property-carrying driver must take 10 consecutive hours off duty before driving, may not drive after 14 consecutive hours on duty, may drive 11 hours within that window, and must take a 30-minute interruption before exceeding 8 hours of driving time. The weekly caps are 60 hours in 7 days, or 70 hours in 8 days where the carrier operates every day.

How long do trucking companies keep maintenance records?

Under 49 CFR 396.3(b) carriers must maintain records for each vehicle they control covering 30 consecutive days. That window is short enough that a maintenance history requested months after a crash may no longer exist in the form needed, which is why a written preservation request early matters more than a records request later.

Who is responsible if cargo shifted or was overloaded?

Often a different company from the one driving. The shipper, the loader or a broker may each have contributed, and Part 393 of the federal regulations, which Illinois has adopted, governs parts and accessories necessary for safe operation including cargo securement. Each additional defendant carries its own limitation analysis.

Can I recover if I was partly at fault for the truck crash?

Yes, as long as your share of the fault is 50% or less. Under 735 ILCS 5/2-1116 your damages are reduced in proportion to your share, so a 20% finding on a $100,000 award leaves $80,000. You are barred entirely only if your fault is more than 50%.

Talk to an Elmwood Park truck accident lawyer

In a truck case the cause and the evidence are the same question, and the evidence belongs to the company you would be claiming against. Logs, qualification files and maintenance records are all held by the carrier, and some of them are only required to exist for thirty days.

If you were hurt in a truck crash in Elmwood Park, Oak Lawn, Skokie, Niles, Orland Park or anywhere in Cook County, Lawyer Furqan will get preservation letters out to every party that may hold something. Where a truck crash proves fatal, a separate wrongful death claim runs alongside.

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

This article is general legal information about Illinois law, not legal advice, and creates no attorney-client relationship. What caused any particular crash depends on its own evidence, and nothing here predicts a result.

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