Pavements Branch, WSDOT State Materials LaboratoryGIS layers symbolizing various data in the WSPMS database The surface type of the preservation unit, generally ACP (Asphalt Concrete Pavement), BST (Bituminous Surface Treatment) or PCCP (Portland Cement Concrete Pavement). A brief user guide is located at: https://data.wsdot.wa.gov/geospatial/DOT_WSPMS/WSPMSFeatureClassFieldDescription.docxArcGIS DynamicMapLayerhttps://hub.arcgis.com/datasets/82bbc3a9e779402d9bd53f0464ccca04_2engState of Washington Geospatial Open Data PortalPublicWSDOT – Pavement Data Surface Type [Washington (State)]Web servicesWashington (State)Last Modified: 2025-10-07