625 ILCS 5/1-105: Authorized emergency vehicle.

Emergency vehicles of municipal departments or public service corporations as are designated or authorized by proper State, county, or local authorities; police vehicles; vehicles of the fire department; vehicles of a HazMat or technical rescue team authorized by a county board under Section 5-1127 of the Counties Code; ambulances; vehicles of the Illinois Department of Corrections; vehicles of the Illinois Department of Juvenile Justice; vehicles of the Illinois Emergency Management Agency; vehicles of the Office of the Illinois State Fire Marshal; mine rescue and explosives emergency response vehicles of the Department of Natural Resources; vehicles of the Illinois Department of Public Health; vehicles of the Illinois State Toll Highway Authority with a gross vehicle weight rating of 9,000 pounds or more and those identified as Highway Emergency Lane Patrol; vehicles of the Illinois Department of Transportation identified as Emergency Traffic Patrol; and vehicles of a municipal or county emergency services and disaster agency, as defined by the Illinois Emergency Management Agency Act.