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Seattle's channelization data represents roadway paint lines, curbs, and other markings that delineate traffic lanes, bike routes, and bus zones. The dataset is owned by the SDOT Transportation account and was last updated on March 22, 2026. It is described as a dynamic layer updated via AutoCAD, with no scheduled refresh cycle.
Available in multiple formats (CSV, JSON, KML, GeoPackage, etc.); users must select the appropriate geospatial format for their tools.