Seattle Roadway Channelization Markings for Traffic Safety

A dynamic dataset from the City of Seattle's SDOT Transportation account, last updated on 2026-03-22. It represents roadway paint lines, curbs, and other markings that delineate traffic lanes, bike routes, and bus zones. The data is structured into layers including Vertical Elements, Lane Widths, Panel Markings, and Longitudinal Markings.

Use Cases

• Modeling traffic lane configurations based on longitudinal and transverse markings data.
• Analyzing bike route and bus zone infrastructure based on the channelization layers.
• Assessing public safety and road design compliance using the delineated markings data.
• Integrating roadway geometry into urban planning simulations based on lane widths and vertical elements.

Strengths

• Data is dynamically updated via AutoCAD, suggesting ongoing maintenance.
• Contains multiple structured layers (e.g., Longitudinal Markings, Transverse Markings) for detailed analysis.
• Explicitly owned and provided by the City of Seattle's SDOT Transportation account.

Limitations

• Row count and dataset size are unknown, which may limit suitability assessment.
• Column-level documentation is absent; field semantics must be inferred after download.
• 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, derived from AutoCAD updates.

Time Range

null

Freshness

Dynamic via AutoCAD updates; last record update was 2026-03-22.

Geography

Likely covers the City of Seattle, given the organization source.