Method for accuracy assessment of aggregated freeway traffic data

Correction of Measured Traffic Volume on Expressways Based on Traffic Volume Balancing

“…Studies on the correction of measured traffic volume can be classified by the approach employed into methods of fundamental consistency, historical consistency, and network consistency. The fundamental consistency correction method corrects the traffic volume error based on traffic flow theory but when this approach is used, it is impossible to correct the measured traffic volume in the event of very small errors [4]. The historical consistency correction method corrects the error based on past historical traffic volume.…”

“…Thus, it is necessary to correct the traffic volume measured on the expressway which shows a traffic imbalance to satisfy the requirement of traffic volume balance. The traffic volume measured on the expressway based on the annual traffic volume report includes measurement errors, as shown in eqn (4). There is always a measurement error because the exact amount of actual traffic cannot be identified.…”

“…Over the years, numerous studies have been performed with the aim of correcting the traffic volume information (hereinafter, measured traffic volume) collected from expressway detectors [4]. Most of the studies performed correction based on consistency with traffic flow theory and historical data, but did not consider traffic balancing on the basis of network consistency [5]- [8].…”