City of Seattle ArcGIS OnlineStreets data includes: Arterial Classification, Street Names, Block Number, Direction, One-way, Surface Width, Surface Type, Pavement Condition, Speed Limit, Percent Slope. From the Hansen Asset Management System: The linework is from the SND(Street Network Database) which can be found at our open data site - https://data-seattlecitygis.opendata.arcgis.com/datasets/street-network-database-snd . Attribute Information: https://www.seattle.gov/Documents/Departments/SDOT/GIS/Seattle_Streets_OD.pdf Update Cycle: Weekly Contact Email: DOT_IT_GIS@seattle.gov --- Common SDOT queries and data downloads Arterial Classification : of Seattle Streets ARTCLASS IN(1,2,3,4) Transit Classification : of Seattle Streets TRANCLASS IN(1,2,3,4,5,6)ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/f91318f1cc43489fb0e7aca2fde22899_0engSeattle GeoDataPublicSeattle Streets [Washington (State)--Seattle]Web servicesWashington (State)--SeattleWashington (State)Last Modified: 2026-01-08