Connecticut Vehicle Crash Data Repository

The Connecticut Crash Data Repository (CTCDR) provides access to crash information collected by state and local police. It enables queries by date, route, collision type, and injury severity for research and analysis.

Use Cases

• Analyze crash frequency and trends by route and route class over time.
• Study the distribution of injury severity across different collision types.
• Identify patterns in crash data by summarizing events based on user-defined categories like date or location.

Strengths

• Data is sourced from two authoritative state agencies: the Department of Public Safety (DPS) and the Connecticut Department of Transportation (CTDOT).
• The repository is designed to provide timely, accurate, complete, and uniform crash data for the traffic-safety community.
• Supports complex queries by multiple dimensions including date, route, collision type, and injury severity.

Limitations

• The specific number of rows, columns, and overall dataset size is unknown, limiting pre-download assessment of scale.
• Primary access is via an HTML web tool, which may complicate bulk data extraction and automated analysis compared to structured file formats.
• Data completeness and uniformity depend on reporting from multiple police sources, which may introduce inconsistencies.

Provenance

Source

State of Connecticut

Collection Method

Collected by state and local police, aggregated from the Department of Public Safety (DPS) and the Connecticut Department of Transportation (CTDOT).

Freshness

Last updated on 2025-09-14.

Geography

Connecticut, USA