Research on driving style of expressway ramp entrance section
To analyze the driving style of drivers at the on-ramp junction of the expressway,this paper employs the NGSIM dataset.To ensure the accuracy of data,spatiotemporal constraints are set to eliminate abnormal data and the smoothed trajectory data in on-ramp merging area are obtained.First,factor analysis(FA)method is employed to reduce the dimensionality of the original multidimensional features and five major factors well represented in the driving style are obtained.Second,the K-means algorithm is used to cluster the principal factors and three driving styles are identified:cautious,prudent and aggressive driving.The recognition results before and after FA are compared.Our results show in aggressive driving,continuous lane-change within a short period of time and the smaller headway during the whole ramp merging process are more likely to occur.
国家科技期刊平台
NSTL
万方数据
