01150468

Component

https://doi.org/10.3141/2198-07

http://scholar.google.com...nier&publication_year=2010

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.

01331205

10-3739

English

pp 52-64

2010

Transportation Research Record: Journal of the Transportation Research Board

9780309160742

Print

Figures (9) ; References (38) ; Tables (1)

Automatic data collection systems; Before and after studies; Pedestrian safety; Pedestrian vehicle interface; Pedestrians; Traffic conflicts; Video cameras

Pedestrian scramble signals

Oakland (California)

Highways; Operations and Traffic Management; Pedestrians and Bicyclists; Safety and Human Factors; I73: Traffic Control; I80: Accident Studies

TRIS, TRB, ATRI

Jan 25 2010 11:54AM

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• Incorporating Bicycle and Pedestrian Topics in University Transportation Courses: A National Scan
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