Washington State Department of TransportationThis is an extract from the TRansportation Information and Planning Support (TRIPS) mainframe database for Federal and State Functional Classifications along State Routes. State Route identifiers and locations based on State Route Mileposts and Accumulated Route Mileage are also included for geographic reference and for use with the Washington State Department of Transportation's 24k and 500k Linear Referencing Systems. Please direct questions about this dataset to: TransportationGISDataSteward@wsdot.wa.gov.ArcGIS DynamicMapLayerhttps://hub.arcgis.com/datasets/52b2c133686046de8d38569783172a5b_0engState of Washington Geospatial Open Data PortalPublicWSDOT - Functional Class Data for State Routes [Washington (State)]Web servicesWashington (State)Last Modified: 2025-10-07