New York City Neighborhood Slow Zones for Traffic Calming

New York City's Neighborhood Slow Zone program data details areas where speed limits are reduced to 20 mph. The dataset includes zone names, geometries, and implementation years, managed by the City of New York. It was last updated in April 2026.

Use Cases

• Analyze the spatial distribution of slow zones using the_geom to identify coverage gaps.
• Associate the Year column with crash data to evaluate the long-term impact of speed limit reductions.
• Calculate total area treated per zone using Shape_Area for program cost-benefit analysis.
• Use the Name field to correlate zone locations with the presence of schools or other neighborhood amenities mentioned in the program criteria.

Strengths

• Includes geospatial geometries (the_geom) for mapping and spatial analysis.
• Contains a Year column for temporal trend analysis of zone implementations.
• Managed by an official city data portal (data.cityofnewyork.us).

Limitations

• Sample size (row count) and total data size are unknown.
• Lacks detailed columns on specific treatments (e.g., count of speed humps) or pre/post-implementation crash metrics.

Provenance

Source

data.cityofnewyork.us

Collection Method

Application-based program data; areas chosen based on crashes, schools, amenities, and community support.

Time Range

null

Freshness

Last updated April 2026, indicating recent maintenance.

Geography

New York City, New York, USA