Traffic Signal Interval Study Intersection and Crash Data

The dataset was last updated in March 2026. It contains intersection summary and crash data used for modeling yellow change and red clearance intervals, compiled by the Department of Transportation.

Use Cases

• Model crash frequency based on intersection summary variables like traffic volume and signal timing.
• Analyze relationships between crash severity metrics and intersection geometric or control features.
• Assess the safety impact of signal clearance intervals using crash type and time-of-day data.

Strengths

• Data originates from the authoritative Department of Transportation.
• Includes multiple machine-readable formats: JSON, XML, RDF, and CSV.
• Updated in March 2026, indicating recent maintenance.

Limitations

• Specific row count, column names, and data size are unknown.
• The geographic scope of the intersections and crashes is not specified.
• The sample data is unavailable for previewing structure and values.

Provenance

Source

Department of Transportation

Collection Method

Master spreadsheet compiled for a pooled fund study on traffic signal intervals.

Time Range

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Freshness

2026-03-26

Geography

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