VerticalElements: Seattle Roadway Channelization Markings for Traffic Delineation

Dynamic roadway channelization data from the City of Seattle, last updated 2026-03-22. The dataset represents paint lines, curbs, and other markings that delineate traffic lanes, bike routes, and bus zones, which are critical for public safety. It is owned by the SDOT Transportation account and is made available as a common data layer in Open Data.

Use Cases

• Map and inventory roadway safety features based on described channelization layers like lane markings and curbs.
• Analyze traffic lane and bike route configurations for urban planning based on the delineation data.
• Simulate autonomous vehicle perception systems based on geospatial representations of road markings.
• Monitor public infrastructure assets like bus zones and panel markings for maintenance planning.

Strengths

• Data is dynamically updated via AutoCAD, suggesting a link to authoritative engineering sources.
• Contains multiple described layers including Vertical Elements, Lane Widths, and Longitudinal Markings.
• Offered in multiple file formats including CSV, JSON, KML, and GeoPackage for flexibility.

Limitations

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

Provenance

Source

City of Seattle, SDOT Transportation account.

Collection Method

Common data layer created from a read-only view of a feature layer.

Time Range

Dynamic; no specific temporal coverage stated.

Freshness

Dynamic via AutoCAD updates; last metadata update was 2026-03-22 03:46:04.029085.

Geography

Likely City of Seattle, Washington, USA.