King CountyFor more information about this layer please see the GIS Data Catalog . Analysis of actual weekday vehicle speeds along the major highway and freeway corridors within the King County Access service area. Data is based upon weekdays between Aug 14th, 2012 through Aug 21st, 2012. Speed and location data was gathered from mobile data computers onboard Metro Access vehicles.ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/4f226d94b26d44c28839618a2815a867_0engKing County GIS Open DataPublicSpeeds (Actual) Collected from KC Transit Access Vans on Freeways and Major Highways [Washington (State)--King County]Web servicesWashington (State)--King CountyWashington (State)Last Modified: 2025-08-02