Iowa Department of TransportationThe classification of Iowa primary highways according to their functional purpose is the foundation for the application of the access management criteria in the Iowa Access Management Manual and is further described in Chapter 2. The system of priority classifications for access management is in direct response to IC 306A.4 and guides Department decisions on the type and design of access to be provided to land abutting Iowa primary highways ensures that access is located and designed to preserve public safety and support the function and purpose of the highway, while ensuring that Iowa landowners will have reasonable access to their property from the system of public streets and highways.ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/00ece7c3e03e450893b911a6d2f3f19e_0engIowaDOT Open DataPublicAccess Categories [Iowa]Web servicesIowaLast Modified: 2025-09-18