What to Do in the First 24 Hours After a Car Accident in Illinois 

by | Jun 8, 2026

Front-end damage to a car after an Illinois accident

A car accident can turn an ordinary day upside down in a matter of seconds. Even when the crash seems relatively minor, the hours that follow are often filled with confusion, stress, and uncertainty. 

What should you do first? Do you need to call the police? Should you seek medical attention even if you feel okay? 

The first 24 hours after a crash can be important for both your health and any future insurance or legal claims. Knowing what steps to take can help protect your well-being and preserve important information about the accident. 

Check for Injuries and Seek Medical Attention 

Immediately after an accident, safety should be the priority. 

If anyone is injured, call 911 and request emergency medical assistance. Even if injuries appear minor, it is important to take them seriously. 

Many common car accident injuries—including whiplash, concussions, and soft tissue injuries—do not always produce symptoms right away. Adrenaline can mask pain and make injuries seem less serious than they actually are. 

If you have any concerns, seeking medical evaluation as soon as possible is often the safest course of action. 

Move to a Safe Location if Possible 

If the vehicles are creating a hazard and can be safely moved, Illinois law generally encourages drivers to move them out of traffic when possible. 

If the vehicles cannot be moved safely, remain in a secure location and wait for emergency responders. 

Avoid standing in traffic or placing yourself at additional risk while assessing the situation. 

Contact Law Enforcement 

One of the most important steps after an accident is notifying law enforcement. 

Police officers can document the scene, gather information from the parties involved, and prepare an official report. 

Understanding Illinois crash reporting requirements is important because certain accidents must be reported, particularly when there are injuries, fatalities, or significant property damage. 

The police report often becomes a key piece of evidence during the insurance claims process. 

Gather Information at the Scene 

If you are physically able, collect as much information as possible before leaving the accident scene. 

Important information may include: 

  • Names and contact information of all drivers 
  • Vehicle registration details 
  • Insurance information 
  • Driver’s license numbers 
  • Names and contact information for witnesses 

It is also helpful to take photographs of: 

  • Vehicle damage 
  • Road conditions 
  • Traffic signals and signs 
  • Skid marks 
  • Visible injuries 

These details can become important later if questions arise about how the accident occurred. 

Be Careful About What You Say 

Many people instinctively apologize after an accident, even when they are not at fault. 

While being polite is understandable, avoid making statements that could be interpreted as admitting responsibility. 

At the scene, focus on exchanging information and cooperating with law enforcement. Determining fault should be left to investigators, insurance companies, and legal professionals. 

Notify Your Insurance Company 

Most insurance policies require prompt notice of an accident. 

When speaking with your insurance company: 

  • Provide factual information 
  • Be honest about what happened 
  • Avoid guessing or speculating 

It is generally best to stick to the known facts rather than offering opinions about fault or injuries. 

Understand Illinois Car Accident Laws 

Many drivers are unfamiliar with Illinois car accident laws until they are involved in a crash themselves. 

Illinois follows a modified comparative negligence system. This means that fault may be shared among multiple parties, and compensation can be affected by a person’s percentage of responsibility for the accident. 

Because every situation is unique, understanding how the law applies often requires a careful review of the facts. 

Keep Records of Everything 

The first day after an accident is a good time to begin organizing important documentation. 

Keep copies of: 

  • Medical records 
  • Hospital discharge paperwork 
  • Prescription receipts 
  • Repair estimates 
  • Insurance correspondence 

Maintaining thorough records can make it easier to document losses and track the impact of the accident over time. 

How to Report a Car Accident in Illinois 

Many drivers wonder about how to report a car accident in Illinois after leaving the scene. 

In addition to any police response, certain accidents may require submission of additional reports depending on the circumstances. Following reporting requirements helps ensure that the accident is properly documented and can help avoid complications later. 

If you are unsure whether additional reporting is required, it may be helpful to review the applicable state requirements or seek legal guidance. 

What to Do After a Car Accident in Illinois When Injuries Are Involved 

When injuries occur, the situation often becomes more complex. 

Medical treatment, lost wages, vehicle repairs, and insurance negotiations can quickly create additional stress during an already difficult time. 

An experienced Orland Park Car Accident Lawyer can help evaluate the circumstances of the accident, identify potential sources of compensation, and explain available legal options. 

Getting Help After a Serious Car Accident 

The first 24 hours after a crash often set the stage for everything that follows. Taking the right steps early can help protect both your health and your ability to pursue compensation if another party was responsible. 

If you have questions about what to do after a car accident in Illinois or are dealing with injuries caused by someone else’s negligence, speaking with an experienced Orland Park Personal Injury Lawyer can provide valuable guidance. 

At the Law Offices of Michael J. Brennan, injured individuals and families receive direct legal representation and personal attention throughout the claims process. 

Free consultation. No legal fees unless compensation is recovered. 

If you were injured in a crash, contact the firm to discuss your situation and learn more about your options. 

 

Michael J. Brennan - Orland Park Personal Injury Attorney
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Author Profile: Michael J. Brennan

Michael J. Brennan is a personal injury attorney based in Orland Park, Illinois. A former Cook County prosecutor, he has represented injury victims and families across Chicagoland since 1985. At his firm, every case is handled personally… from initial consultation to final resolution.

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