Parking lot accidents at O'Hare International Airport and Midway International Airport involve a tangled legal framework: Illinois premises liability law, the Local Governmental and Governmental Employees Tort Immunity Act, the natural accumulation doctrine, and multiple potential defendants ranging from private drivers to municipal entities to contracted snow removal operators. The most consequential rule for any injured person to understand is the one-year notice and limitations period under 745 ILCS 10/8-101 that applies to any claim against the City of Chicago, which owns and operates both airports through the Chicago Department of Aviation.
O'Hare International Airport and Midway International Airport are both owned and operated by the City of Chicago through the Chicago Department of Aviation. This is not a trivia point. It is the single most important fact in the legal analysis of any injury arising on airport property, because the City of Chicago is a local public entity within the meaning of the Illinois Tort Immunity Act, 745 ILCS 10/1-101 et seq.
The Tort Immunity Act conditions, limits, and shortens the timeline for any claim against the City. The Act applies regardless of whether the claim sounds in premises liability, ordinary negligence, willful and wanton conduct, or another tort theory. Strict compliance with the Act's procedural requirements is a precondition to suit. The Act does not extend to claims against private defendants such as other drivers, off-airport parking operators, or independent contractors, but those claims often share defendants and operative facts with the public-entity claim, and the procedural divergence creates litigation traps.
Chicago winters generate a recurring set of slip and fall claims at both airports. The applicable Illinois common-law doctrine, the natural accumulation rule, holds that a property owner generally is not liable for injuries caused by natural accumulations of ice and snow. The rule reflects the policy judgment that imposing a strict snow-removal duty would be impractical and inequitable in a state with severe winters.
The rule, however, is not absolute. Illinois courts have recognized four principal exceptions:
If the property owner or its contractor voluntarily undertakes snow and ice removal, the undertaking must be performed with reasonable care. A negligent removal that leaves the surface more dangerous than the natural accumulation would have been can support liability. Airport operators that contract for snow removal trigger this exception.
An accumulation is unnatural when caused by an artificial or human-created condition rather than purely by weather. Common scenarios include water draining from a defective downspout onto a walking surface that refreezes, refreeze patterns caused by improper sloping or clearing, piling of cleared snow in a manner that creates new pedestrian hazards, and structural conditions (gutter failures, sloped ramps) that funnel water into refreeze zones.
An owner who creates an aggravated hazard through its own conduct (for example, by partially clearing a path and leaving a slick remnant, or by spreading inadequate or ineffective de-icing material) can be liable even where the underlying condition began as natural.
A statute, ordinance, or contract may impose a snow removal duty that, if breached, supports liability independent of the common-law rule.
Airport parking facilities, which actively manage snow and ice through contracted vendors, frequently fall into one or more of these exceptions. The natural accumulation rule is a defense that must be raised and proved, not an automatic bar to recovery.
A traveler walking through a parking row is struck by a vehicle backing out of a stall. The most common scenario. Liability runs primarily against the driver under standard auto negligence principles and the Illinois Vehicle Code's rules regarding lookout and reasonable care when backing. Comparative fault is frequently raised against the pedestrian (inattention, walking outside marked walkways), making contemporaneous documentation of the layout and the pedestrian's path essential. The City Department of Aviation may have residual liability if a defect in the design or marking of pedestrian paths contributed.
A traveler slips on ice in a parking lot or on a walkway between the lot and the terminal. The natural accumulation rule is the threshold defense. The plaintiff's case typically rests on proving an exception: the airport's snow removal contractor cleared the area but did so negligently, drainage created an unnatural refreeze pattern, or the airport's snow piling created a new pedestrian hazard. Critical evidence: the snow removal contract, the contractor's logs, NOAA weather records, surveillance footage, and photographs taken before further weather alters the scene.
A traveler trips on a cracked walkway, a pothole, a raised parking block, or a damaged curb. Premises liability under 740 ILCS 130 imposes a duty to maintain in reasonably safe condition. The defense often turns on the de minimis rule (Illinois courts find that minor defects, typically less than two inches, may not support liability as a matter of law) and on notice (did the owner have actual or constructive knowledge of the defect). The Tort Immunity Act notice and limitations period applies to the City as defendant.
A driver in a parking garage collides with another vehicle at a blind corner, ramp transition, or exit gate. Liability is typically driver-on-driver under auto negligence principles. The garage operator's design and signage can be in issue if a design defect (inadequate sightlines, missing mirrors, unmarked merge points) contributed to the collision. Garage structural failures (collapsed deck sections, falling debris) implicate premises liability and, in catastrophic cases, structural engineering and construction defect theories.
A shuttle bus operated by a hotel, off-airport parking operator (WallyPark, The Parking Spot, Park 'N Fly), rental car company (Hertz, Avis, Enterprise), or other private operator strikes a pedestrian or another vehicle. Commercial auto liability insurance applies. Many shuttle operators carry $1 million or higher policy limits. The shuttle operator's logs, driver training records, hours-of-service records, and vehicle maintenance records become discovery targets.
A traveler is assaulted, robbed, or otherwise victimized by a third party in a parking garage. Illinois recognizes negligent security claims against premises operators with notice of similar prior incidents or knowledge of security gaps. The case requires preservation of surveillance footage (typically overwritten within 14 to 30 days), discovery of prior incident reports, and expert testimony on industry security standards. Foreseeability is the central legal battle.
Most airport parking lot cases involve more than one insurance policy. The order of operations matters because primary, excess, and umbrella coverages stack in a defined sequence:
Several categories of critical evidence have short shelf lives. A delayed case can lose proof that was available in the first thirty days.
Yes. Both are operated by the Chicago Department of Aviation, making the City a local public entity subject to the Illinois Tort Immunity Act for any premises-based claim.
General Illinois personal injury claims are subject to the two-year limitations period under 735 ILCS 5/13-202. Claims against the City of Chicago are subject to the one-year period under 745 ILCS 10/8-101 of the Tort Immunity Act. The reduced period is strict and narrowly tolled.
740 ILCS 130 imposes a duty of reasonable care on possessors of land toward entrants. Airport parking patrons are paid entrants. The duty includes inspection, remediation, warning, and maintenance.
Not automatically. The rule has four recognized exceptions: voluntary undertaking, unnatural accumulation, aggravation by owner conduct, and statutory or contractual duty. Airport facilities that contract for snow removal frequently fall into one or more.
The at-fault driver, the City Department of Aviation, the snow and ice removal contractor, valet or shuttle operators, rental car companies, and in some configurations the general contractor or property management firm.
The Aviation Police incident report, surveillance footage (14-30 day retention), scene photographs, the snow removal contract and contractor logs, NOAA weather records, and witness identification before witnesses disperse.
Generally no. Federal preemption applies to aviation operations and air safety, not to premises liability for injuries on airport property. State law governs slip and falls, vehicle collisions, and security failures.
Section 8-101 imposes a one-year limitations period for any civil action against a local public entity. Strict compliance is required. Equitable tolling and the discovery rule are narrowly applied.
Illinois follows a modified comparative fault rule under 735 ILCS 5/2-1116. A plaintiff more than 50% at fault is barred. A plaintiff 50% or less at fault recovers, reduced by the plaintiff's percentage.
Punitives require willful and wanton conduct. They are not available against the City of Chicago under 745 ILCS 10/2-102. They may be available against private defendants in cases of extreme misconduct.
This encyclopedia entry is for educational purposes only and does not constitute legal advice. Reading it does not create an attorney-client relationship. Every case is fact-specific. Past results do not guarantee future outcomes. For a description of how this encyclopedia sources, verifies, and reviews its content, see our Editorial Policy and Fact-Check and Corrections Policy. The advertising-responsible attorney for this site is identified there. Marvet M. Sweis is admitted to practice in Illinois.