Iowa Department of TransportationMaintenance District Boundaries generated from the county based district boundary layer and adjust to match the road networked based on which region is maintaining that area of the network. These are different than Iowa DOT's Transportation Districts.ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/24f3b635c8af4c65a92da80a907a7385_0engIowaDOT Open DataPublicMaintenance Districts [Iowa]Web servicesIowaLast Modified: 2026-01-05