CORRECTION OF MEASURED TRAFFIC VOLUME ON EXPRESSWAYS BASED ON TRAFFIC VOLUME BALANCING

This study developed an optimization method to correct the measured expressway traffic volume that minimizes measurement errors and satisfies the traffic balancing with TCS. For this purpose, the model constructed in this study was compared with the true traffic volume and verified. Through the verification of the model, it was found that the measurement error is reduced when the measured traffic volume is corrected for the traffic volume balance. By applying it to 21 links of the Gyeongbu expressway, the measured traffic volume was corrected by –8.1%~9.6% and the measurement error was decreased as much as the corrected traffic volume. This research is meaningful in terms of improving the accuracy of the measured traffic volume of the expressway, which is significant considering that the role of the expressway are increasing.