Washington State Department of TransportationState Routes are depicted as lines with State Route identifiers and route measure attributes. All State Routes are included in this dataset. A directional indicator has been added to the RouteIdentifier to distinguish between the increasing and decreasing direction of mileposting. Please direct questions about this dataset to: TransportationGISDataSteward@wsdot.wa.gov.ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/62b1eef6350b435f9d3ef0cf7be5f42b_9engState of Washington Geospatial Open Data PortalPublicWSDOT - State Route Linear Referencing System (LRS) Current [Washington (State)]Web servicesWashington (State)Last Modified: 2025-10-07