District of Columbia Annual Average Daily Traffic Volume

2023 traffic volume data for roadway blocks in the District of Columbia, created by the District Department of Transportation. The dataset contains Annual Average Daily Traffic (AADT) figures derived from bi-directional counts taken on Highway Performance Monitoring System sections. Data is collected on a three-year cycle.

Use Cases

• Analyze Annual Average Daily Traffic (AADT) trends across different roadway blocks to identify high-volume corridors.
• Model traffic flow and congestion patterns using AADT data for transportation planning.
• Integrate AADT data with other geographic datasets for spatial analysis of transportation infrastructure.

Strengths

• Data is provided by the authoritative District of Columbia Department of Transportation (DDOT).
• Includes derived Annual Average Daily Traffic (AADT) metrics, a standard for traffic analysis.
• Data is available in multiple formats including CSV, GEOJSON, and API endpoints for flexibility.

Limitations

• The specific number of records (rows) and data attributes (columns) are unknown, limiting assessment of scope.
• Data collection occurs on a three-year cycle, meaning counts for specific locations may not be updated annually.
• Geographic coverage is limited to the District of Columbia, not representative of broader regional traffic.

Provenance

Source

District of Columbia Department of Transportation (DDOT) Roads and Highways database.

Collection Method

Bi-directional traffic counts collected at pre-selected locations on HPMS sections, converted to Annual Average Daily Traffic (AADT).

Time Range

2023, with data collected on a three-year cycle.

Freshness

Dataset metadata was last updated in February 2025, indicating active maintenance.

Geography

Roadway blocks within the District of Columbia (Washington D.C.).