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http://dx.doi.org/10.12652/Ksce.2014.34.5.1535

A Study on Improving the Reliability of DSRC Traffic Information Considering Traffic and Road Characteristics - Focusing on Busan Urban Expressway -  

Jeong, Yeon Tak (Busan Metropolitan City Transportation Information Center)
Jung, Hun Young (Pusan National University)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.34, no.5, 2014 , pp. 1535-1545 More about this Journal
Abstract
This study aims at improving the Reliability of DSRC Traffic information considering Traffic and Road Characteristics. First of all, this study analyzed the characteristics of DSRC data on urban expressway and problems of outlier data occurrence. After then, this study produced reliable traffic information by using an optimal method of the Outlier-Filtering. After Outlier-Filtering, this study performed accuracy evaluation and appropriateness check for the number of samples per confidence level. As a result, it showed that the MAPE was between 2.2% and 9.7% and RSME was between 2.2 and 7.5 which are very similar figures to the actual average traffic speed. Also, The samples of both Am peak and Pm peak periods were analyzed to be appropriate at the confidence level of 95%, and 90% within the allowable error range of 5kph.
Keywords
DSRC; Traffic information; Minimum sampling number; Reliability improvement; Outlier;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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