Traffic Signal Locations and Safety Features in Washington DC

District of Columbia data details the location and attributes of traffic signals, aggregated to the controller level. It tracks specific safety features like leading pedestrian intervals, No Turn on Red signage, and transit signal priority. The dataset is periodically updated, with a last recorded update in March 2026.

Use Cases

• Map traffic signal locations and analyze the distribution of safety features like leading pedestrian intervals (LPIs) and No Turn on Red (NTOR) signage.
• Assess intersection safety by correlating the presence of specific attributes such as all-pedestrian phases, bike phases, and HAWK/PHB signals.
• Support transportation planning by identifying intersections equipped with transit signal priority (TSP) and accessible pedestrian signals (APS).
• Study pedestrian recall mode implementation across signalized intersections to evaluate traffic flow policies.

Strengths

• Data is provided by the authoritative District of Columbia government organization.
• Includes a detailed list of tracked safety attributes at signalized intersections.
• Available in multiple geospatial formats including GeoJSON, KML, and CSV for flexibility.

Limitations

• The specific number of records (rows) and data attributes (columns) is unknown, limiting precise assessment of scale.
• Data may not be current at the time of viewing as it is updated periodically, not in real-time.
• Geographic coverage is limited to the District of Columbia, not applicable for broader regional analysis.

Provenance

Source

District of Columbia government

Collection Method

Aggregated to the traffic signal controller level (ACISA).

Freshness

Last updated on 2026-03-11.

Geography

District of Columbia, Washington DC