Seattle Traffic Flow Counts from Department of Transportation Studies

Weekly refreshed traffic study flow count data maintained by the Seattle Department of Transportation. Users can filter the data for a particular year using a provided definition query. The dataset is published on the Data.gov platform and was last updated on March 22, 2026.

Use Cases

• Analyze annual traffic volume trends based on the STDY_YEAR field mentioned in the description.
• Model urban traffic flow patterns based on flow count data.
• Assess transportation infrastructure needs for specific Seattle locations.
• Validate traffic simulation models using observed flow count data.

Strengths

• Data is refreshed weekly, suggesting regular updates.
• Managed by the authoritative Seattle Department of Transportation.
• Supports multiple file formats including CSV, JSON, and geospatial formats (KML, GeoPackage).
• Allows filtering by study year (STDY_YEAR) as described.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Description metadata is limited; actual data quality requires manual inspection after download.

Provenance

Source

Seattle Department of Transportation.

Collection Method

Likely collected via traffic study sensors or manual counts.

Time Range

Coverage is by year, but specific range is not stated.

Freshness

Weekly refresh; last updated 2026-03-22 03:39:51.259221.

Geography

City of Seattle.