As of 2015, you can contact the Illinois Department of Transportation by phone at 217-782-7820 or by mail at 2300 S. Dirksen Parkway, Springfield, Illinois, 62764. You can also click on the Contact tab at IDOT.Illinois.gov to submit a contact form online.
The Illinois Department of Transportation reviews and responds to messages during normal business hours on weekdays. All residents who submit a comment requiring a reply are answered within 10 business days. The website also includes detailed directories for customers who want to connect with a specific employee or department.
The Illinois Department of Transportation recommends that travelers use 911 to report emergency road conditions.