Illinois Vehicle Code 625 ILCS 5/11-1429 limits heavy-duty diesel vehicles to 10 minutes of idling per hour in Cook County and other regulated areas. Cook County Department of Public Health enforces air-quality complaints in suburban Cook.
Section 11-1429 of the Illinois Vehicle Code applies to diesel-powered vehicles over 8,000 pounds operating in Cook, DuPage, Kane, Lake, McHenry, and Will counties. Drivers may not idle more than 10 minutes in any 60-minute period. Exceptions exist for traffic, sleeper-berth heating below 32 degrees or above 80 degrees, repairs, emergency vehicles, and powering work equipment. Cook County DPH and Illinois EPA share enforcement; CCDPH responds to neighborhood complaints in suburban Cook. Chicago has its own stricter 3-minute rule under MCC 9-64-180.
First offense $50, escalating to $150 for repeat violations within one year. Commercial fleet operators face additional Illinois EPA penalties up to $500 per day per vehicle.
See how Des Plaines's vehicle idling restrictions rules stack up against other locations.
Help us keep this page accurate. If you notice an error or outdated information, let us know.