Iowa Department of TransportationIowa Winter Road Conditions. Conditions are updated every 10 minutes during the winter season (October 15 to April 15) and on an as-needed basis during the non-winter months. Layer and service is maintained by the Iowa DOT GIS team on behalf of the Office of Traffic Operations.ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/181770a5c1bf498797245c13afffa155_0engIowaDOT Open DataPublicIowa 511 Winter Road Conditions [Iowa]Web servicesIowaLast Modified: 2026-01-08