Washington State Department of TransportationThis dataset provides geospatial locations for all of the valid Accumulated Route Mileage (ARM) and State Route Milepost (SRMP) values along State Routes in Washington State. Please direct questions about this dataset to: TransportationGISDataSteward@wsdot.wa.gov.ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/22324eb30f6949eabc180bfbe0de6fcb_0engState of Washington Geospatial Open Data PortalPublicWSDOT - State Route Points (1:24K) Current [Washington (State)]Web servicesWashington (State)Last Modified: 2025-08-26