Automated Analysis of Pedestrian–Vehicle Conflicts: Context for Before-and-After Studies
This paper presents a novel application of automated video analysis for a before-and-after (BA) safety evaluation of a scramble phase treatment. Data availability has been a common challenge to pedestrian studies, especially for proactive safety analysis. The traditional reliance on collision data has many shortcomings because of the quality and quantity of collision records. Qualitative and quantitative issues with road collision data are more pronounced in pedestrian safety studies. In addition, little information on the mechanism of action implicated can be drawn from collision reports. Traffic conflict techniques have been advocated as supplements or alternatives to collision-based safety analysis. Automated conflict analysis has been advocated as a new safety analysis paradigm that empowers the drawbacks of survey-based and observer-based traffic conflict analysis. One of the areas of focus of pedestrian safety that could greatly benefit from vision-based road user tracking is BA evaluation of safety treatments. This paper demonstrates the feasibility of conducting a BA analysis with video data collected from a commercial-grade camera in Chinatown, Oakland, California. Video sequences for a period of 2 h before and 2 h after scramble were automatically analyzed. The BA results of the automated analysis exhibit a declining pattern of conflict frequency, a reduction in the spatial density of conflicts, and a shift in the spatial distribution of conflicts farther from crosswalks.
- Record URL:
- Summary URL:
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Availability:
- Find a library where document is available. Order URL: http://www.trb.org/Main/Blurbs/Pedestrians_2010_165054.aspx
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Authors:
- Ismail, Karim
- Sayed, Tarek
- Saunier, Nicolas
- Publication Date: 2010
Language
- English
Media Info
- Media Type: Print
- Features: Figures; References; Tables;
- Pagination: pp 52-64
- Monograph Title: Pedestrians 2010
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Serial:
- Transportation Research Record: Journal of the Transportation Research Board
- Issue Number: 2198
- Publisher: Transportation Research Board
- ISSN: 0361-1981
Subject/Index Terms
- TRT Terms: Automatic data collection systems; Before and after studies; Pedestrian safety; Pedestrian vehicle interface; Pedestrians; Traffic conflicts; Video cameras
- Uncontrolled Terms: Pedestrian scramble signals
- Geographic Terms: Oakland (California)
- Subject Areas: Highways; Operations and Traffic Management; Pedestrians and Bicyclists; Safety and Human Factors; I73: Traffic Control; I80: Accident Studies;
Filing Info
- Accession Number: 01150468
- Record Type: Publication
- ISBN: 9780309160742
- Report/Paper Numbers: 10-3739
- Files: TRIS, TRB, ATRI
- Created Date: Feb 19 2010 10:57AM