Seattle Freight Network: Over Legal Routes and Truck Streets

A nightly-refreshed dataset of freight-related geospatial features for Seattle, maintained by the Seattle Department of Transportation. It includes major truck streets, the freight network, over legal routes, and the heavy haul network. The data was last updated on 2026-03-22.

Use Cases

• Route planning for heavy vehicles based on designated major truck streets.
• Compliance analysis for freight operations using the over legal routes feature.
• Infrastructure assessment for freight corridors using the freight network data.
• Mapping permitted paths for oversized loads based on the heavy haul network.

Strengths

• Data is maintained and updated nightly by the Seattle Department of Transportation.
• Includes four distinct feature classes for freight analysis: MajTrkStrts, FMP_FreightNetwork, Freight_OverLegalRoutes, and Freight_HeavyHaulNetwork.
• Available in multiple geospatial and tabular formats, including CSV, JSON, KML, and GeoPackage.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count and dataset size are unknown, which may limit suitability assessment.
• Data may reflect geographic bias inherent to its focus on the City of Seattle.

Provenance

Source

Seattle Department of Transportation

Collection Method

Maintained by the city transportation department.

Time Range

Current, with nightly updates.

Freshness

Nightly refresh cycle; last updated 2026-03-22.

Geography

City of Seattle, Washington, USA.