Abstract
Development of traffic flow monitoring technology is required at areas where are not enough equipped traffic sensor infrastructure such as Asian countries and rural cities in Japan. Data collection from vehicles having smart phone and car navigation system has attracted attention to be one of the solution for those issues since these devices are installed Bluetooth devices that has unique MAC address, and matching of MAC address can collect traffic state data such as travel time, OD traffic volume and so on. However details of characteristics of MAC address data detection have not yet known to use for traffic state analysis. Therefore this research analyzes MAC address data detection rate from Bluetooth devices focusing on the distance and angle between MAC address scanner and transmitters. In addition, difference of setting way (horizontally and vertically placed) of MAC address scanner is also considered to analyze MAC address detection rate. Experiment results shows detection rate changed by distance, angle and setting way of MAC address scanner, and detection rate is significantly different by difference of those factors. Therefore hypothesis of this study what MAC address scanner has directivity to detect MAC address from Bluetooth devices has been supported statistically. And its results also showed importance of considering directivity for data collection from vehicles installing Bluetooth devices.
