详情

原文传递 Travel mode identification using bluetooth technology

题名：	Travel mode identification using bluetooth technology
正文语种：	英文
作者：	Shu Yang; Yao-Jan Wu
作者单位：	Postdoctoral Scholar Center for Urban Transportation Research(CUTR) University of South Florida ; Dept. of Civil Engineering and Engineering Mechanics The University of Arizona 1209 E 2nd St. Room 324F, Tucson, AZ 85721 4202 E. Fowler Ave., CUT 100
关键词：	bluetooth; genetic algorithm; neural network; short corridor; travel mode
摘要：	Bluetooth technology has been widely used in transportation studies to collect traffic data. Bluetooth media access control (MAC) readers can be installed along roadways to collect Bluetooth-based data. This data is commonly used to measure traffic performance. One of the advantages of using Bluetooth technology to measure traffic performance is that travel time can be measured directly with a certain level of error instead of by estimation. However, travel time outliers can commonly be observed due to different travel mode on arterials. Since travel mode information cannot be directly obtained from the raw Bluetooth-based data, a mathematical methodology is in need to identify travel mode. In this study, a genetic algorithm and neural network (GANN)-based model was developed to identify travel mode. GPS-enabled devices were used to collect ground truth travel time. In order to additionally compare the model performance, K nearest neighbor (KNN) and support vector machine (SVM) were also implemented. N-fold cross validation was applied to statistically assess the models’ results. Since the model performances depend on the model inputs, seven collections of model inputs were tested in order to achieve the best travel mode identification performance. An arterial segment with four consecutive links and three intersections was selected to be the study segment. The results suggested that correctly identifying the three travel modes successfully every time was not possible, although the GANN based model had low misidentification rates. In our study, 6.12% of autos were misidentified as bikes and 10.53% of bikes were misidentified as autos using three links.
出版年：	2018
期刊名称：	Journal of Intelligent Transportation Systems Technology Planning and Operations
卷：	22
期：	5
页码：	407-421