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http://dx.doi.org/10.12815/kits.2014.13.5.011

Individual Vehicle Level Detector Evaluation with Application of Traceability and Confidence Interval Concepts  

Jang, Jinhwan (한국건설기술연구원)
Choi, Dongwon (한국건설기술연구원)
Publication Information
The Journal of The Korea Institute of Intelligent Transport Systems / v.13, no.5, 2014 , pp. 11-20 More about this Journal
Abstract
Due to the importance of vehicle detector which plays an essential role in generating real-life traffic information, maintaining detector data quality is preeminent in advanced traffic management and information systems (ATMIS). To this end, agencies periodically conduct performance tests on detectors. Detector evaluation is generally performed by comparing baseline data with corresponding detector data. Here, two important things need to be addressed; one is errors (or uncertainties) included in baseline data and the other is the confidence interval concept to represent evaluation results of sample data to corresponding ones of population. To resolve these problems, a new detector evaluation scheme is introduced and the scheme is applied to individual level detector evaluations of loop, video image, and radar detectors. The purpose of individual level evaluation is to eliminate the balancing (or cancelling-out) effects of over- and under-counts. As a consequence, the proposed scheme is proven to be effectively applied to real-world detector evaluations.
Keywords
Traceability; Confidence Interval; Loop detector; Video Image detector; Radar detector;
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