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Drunk driving is a serious threat to road traffic safety. It is of great significance to identify drunk driving accurately. The drunk driving experiment is conducted in a driving simulator. The driving behavior parameters under the drunk driving and normal driving are collected. The steering wheel angle is selected as the feature based on analysis of variance and analysis of mean. The average sequence of steering wheel angle is calculated using a sliding data window. KNN and SVM are used to identify the driver's state. The optimum data window and the highest recognition accuracy of the two algorithms under different road alignment are obtained. The two classification methods are analyzed. The results show that the recognition performance of the SVM is better than that of the KNN. Data window has a significant effect on the performances of KNN and has no significant effect on the performances of SVM. ©, 2015, Science Press. All right reserved.
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