Vertical Deflections and Speed Humps for Traffic Calming

Vertical deflections, including speed humps, are raised pavement mounds designed to reduce vehicle speeds on neighborhood streets. The dataset is published by the District of Columbia government and was last updated in April 2026. It provides geospatial and attribute data on these traffic calming measures.

Use Cases

• Map the locations of speed humps and other vertical deflections using geospatial coordinates to visualize traffic calming coverage.
• Analyze the relationship between vertical deflection placement and street types or neighborhood characteristics using associated attributes.
• Assess the density of traffic calming measures per administrative zone for infrastructure planning and budget allocation.
• Integrate vertical deflection data with traffic volume or accident datasets to evaluate safety impacts.

Strengths

• Data is provided in multiple standard formats including GEOJSON, CSV, and KML for flexibility.
• Published under a permissive CC-BY-4.0 license, allowing for broad reuse and sharing.

Limitations

• The specific number of records (rows) and detailed attribute columns (e.g., installation date, dimensions) are not provided in the input.
• The temporal coverage (time_range) of when the deflections were installed or recorded is unknown.

Provenance

Source

District of Columbia government.

Collection Method

Likely collected and maintained by municipal transportation or public works departments.

Freshness

Last updated in April 2026, indicating planned future maintenance.

Geography

District of Columbia, USA.