Illinois Department of TransportationFrom Alexander County in the southern tip of the state to Jo Daviess County in the northwest corner, Illinois is a melting pot of demographics, geography and environments. The needs of Illinois residents and visitors vary across the state and IDOT is committed to provide a diverse and effective transportation network to serve individual users and whole communities. IDOT ensures that every area of the state is given equal consideration when planning, programming, implementing and executing transportation projects. IDOT operates with its central headquarters in Springfield and five transportation regions across the state. Throughout each region, IDOT strives to accomplish its primary objectives through the planning and programming of road, bridge, public transportation, rail and aviation projects. These objectives include preservation and maintenance of all existing transportation systems, upgrades to existing facilities as needed, and system expansion across all modes. The five regions host a total of nine highway districts, strategically located to best assess and oversee Illinois' transportation infrastructure.ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/97227d49f82f4a38ae9fa06eb8299ca4_0engIllinois DOT Open Data PortalPublicIllinois Department of Transportation Regions [Illinois]Web servicesIllinoisLast Modified: 2018-06-14