Annual Average Daily Traffic (AADT) Map
Annual Average Daily Traffic (AADT) is an estimated mean daily traffic volume. Commercial Annual Average Daily Traffic (CAADT) is an estimated mean daily commercial traffic volume. Traffic counts are taken throughout the year on the Trunkline and Non-trunkline federal-aid (NTFA) routes throughout Michigan using continuous count sites and short count sites. MDOT actively works with cities, counties, Metropolitan Planning Organizations (MPOs), Regional Planning Associations (RPAs), and MDOT to collect and analyze traffic count data. The AADTs are reported annually to the Federal Highway Administration (FHWA) as part of the Highway Performance Monitoring System (HPMS).