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\section{Conclusion}
This paper demonstrates the theoretical and practical application of a large-scale, automated, video data collection system using computer vision for highly detailed traffic studies, particularly proactive road safety
analysis using surrogate safety analysis. The reader is led step-by-step through the process of collecting, processing, and analysing video
data with data, presenting examples and
discussing challenges along the way. It demonstrates an early implementation in the form of a cross-sectional analysis of driver behaviour in a large set of roundabout video data
testing for contributing factors. .
Several technical challenges and their solutions were outlined, notably tracking error (accuracy optimised up to $94\%$ and no less than
$84\%$ $85\%$ using the comprehensive MOTA methodology),
quantified probability analysis of
collision from TTCs, TTC distributions, and aggregation and sampling
considerations, as they still require particular attention. considerations. It is expected that these issues will be further addressed as processing and analysis tools become more accessible, more collaborators contribute solutions to the open-source software stack, and as techniques applied to transportation issues become more sophisticated.
The full results of the study over all 600 hours of video data Future work will
be the subject examine camera lens, angle and
focus of future papers. More advanced tracking, error detection, motion prediction models, visibility considerations for tracking accuracy, before and
trajectory clustering will also be after studies, and comprehensive analysis of the
subject contributing factors of
further research. the roundabout data set.