Traffic circles maintained by the Seattle Department of Transportation. The data includes raised islands constructed at intersections of residential streets to separate oncoming vehicles and reduce motorist speed. The layer is limited to non-arterial neighborhood traffic circles and is refreshed daily.
Use Cases
- Map the spatial distribution of traffic calming infrastructure based on the geospatial layer.
- Analyze the effectiveness of traffic circles for speed reduction based on their stated purpose.
- Plan neighborhood safety improvements based on the inventory of non-arterial traffic circles.
- Integrate traffic circle locations with collision or speed data for safety studies.
Strengths
- Data is refreshed daily, suggesting regular maintenance.
- Spatial scope is clearly defined as non-arterial neighborhood traffic circles in Seattle.
- Provides a recommended definition query for filtering to active and planned records.
Limitations
- Row count and specific column definitions are unknown, limiting suitability assessment.
- Description metadata is limited; actual data quality requires manual inspection after download.
Provenance
- Source
- City of Seattle, Seattle Department of Transportation
- Collection Method
- Maintained by the Seattle Department of Transportation.
- Time Range
- null
- Freshness
- Daily refresh cycle.
- Geography
- Seattle, Washington, USA