Illinois Department of TransportationDissolved ADT created for improved labeling. Updated from ADT_COMP_2024 Annual Average Daily Traffic volumes (AADT) is a product of IDOT's Traffic Count Program. Counts from this program range in duration from data continuously recorded at permanent count stations to thousands of coverage count locations that are counted for a 24-hour period throughout the year. More information about IDOT's Traffic Count Program can be found at the Illinois Travel Statistics site.ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/fe639dd2b39c4ef68e0f9973bdc6737a_0engIllinois DOT Open Data PortalPublicAnnual Average Daily Traffic (AADT) [Illinois]Web servicesIllinoisLast Modified: 2025-06-19