Call 911 at the scene. As of 2021, you no longer need to file a separate written report with the Illinois Department of Transportation (IDOT) if police filed a report.
If police did not come to the scene, you must file a report with the state within 10 days. Legal and Insurance Aspects
Police reports are crucial. They include officer observations, driver statements, and witness accounts.
You can recover damages if you are 50% or less at fault .
Illinois is a "fault" state, meaning the at-fault driver's insurance covers damages.