Washington State Department of TransportationState Routes are depicted as lines with State Route identifiers and route measure attributes. Routes on State Route ramps. Please direct questions about this dataset to: TransportationGISDataSteward@wsdot.wa.gov.ArcGIS DynamicMapLayerhttps://hub.arcgis.com/datasets/4d8adf92b0614e5a8e55ead0a0cf0bb3_2engState of Washington Geospatial Open Data PortalPublicWSDOT - State Route Ramp (1:24K) Current [Washington (State)]Web servicesWashington (State)Last Modified: 2025-10-07