Iowa Department of Transportation511 events for counties in Iowa that contribute to the Iowa County Engineers Association Service Bureau Roads Application . Not all counties in Iowa contribute data. Some data may be old or incorrect. Contact the county engineer directly for the most current road status. Data gets updated once an hour.ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/6811bd5464fc46f5a7964ae9866a44ce_0engIowaDOT Open DataPublicClosed Routes [Iowa]Web servicesIowaLast Modified: 2026-01-08