Observational Intersection Traffic Safety Analysis II: Vision-Based Surrogate Safety Analysis
Intersections are among the most safety-critical locations in roadway networks, yet detailed data to support proactive intersection safety analysis remain limited beyond the basic detection used for signal controller operations. Building on Phase I advances in efficient vehicle detection and tracking, this project leverages existing camera-based detection deployments, including those in Clark County, Nevada, to move vision-based surrogate safety analysis toward technology transfer and operational deployment. The project uses road-user trajectories produced by Phase I models to compute surrogate safety indicators, principally time-to-collision (TTC) and post-encroachment time (PET), and develops a comprehensive intersection safety score that combines surrogate measure distributions with exposure. Key tasks include obtaining access to live intersection video feeds; implementing trajectory-based safety analysis code; developing the composite safety score; deploying cloud-based, GPU-enabled computing infrastructure with backend database storage for live video analysis; and building a web-based front-end platform presenting maps, safety scores, heat maps, and detailed analytics. Anticipated outcomes include computer vision algorithms for detecting and tracking all road users; trajectory-based indicators covering turning movement counts, pedestrian and bicyclist activity, TTC, and PET; and an operational web platform for storing, visualizing, and reporting safety measurements. Open-source code and datasets will be released publicly, and the team will coordinate with the Regional Transportation Commission of Southern Nevada to ensure tool utility, enabling agencies to identify safety risks earlier and target interventions proactively.
Language
- English
Project
- Status: Active
- Funding: $133,546.00
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Contract Numbers:
69A3552348323
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Sponsor Organizations:
Office of the Assistant Secretary for Research and Technology
University Transportation Centers Program
Department of Transportation
Washington, DC United States 20590 -
Managing Organizations:
2400 6th Street, NW
Washington, DC United States 20059 -
Project Managers:
Bruner, Britain
- Performing Organizations: Las Vegas, NV United States
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Principal Investigators:
Morris, Brendan
- Start Date: 20260803
- Expected Completion Date: 20270504
- Actual Completion Date: 0
- USDOT Program: University Transportation Centers
Subject/Index Terms
- TRT Terms: Computer vision; Safety analysis; Signalized intersections; Traffic safety; Vehicle trajectories; Video
- Geographic Terms: Clark County (Nevada)
- Subject Areas: Data and Information Technology; Highways; Operations and Traffic Management; Safety and Human Factors;
Filing Info
- Accession Number: 01999722
- Record Type: Research project
- Source Agency: Research and Education for Promoting Safety (REPS) University Transportation Center
- Contract Numbers: 69A3552348323
- Files: UTC, RIP
- Created Date: Aug 19 2026 11:52AM