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In order to clarify the lateral acceleration characteristics of vehicles in the turning curve section of low-grade highway in mountainous areas, a section of mountain road with 12 reversing curve sections in Pengshui County, Chongqing was selected as the experimental object, and a driving test of 20 drivers was carried out. The vehicle operating parameters in the driving state, including speed, trajectory and lateral acceleration, etc., were analyzed for the amplitude characteristics, change mode and peak position distribution of lateral acceleration in the turning curve segment. The results show as follows. The overall variation characteristics of vehicle lateral acceleration in the reverse curve segment can be divided into three stages: increasing stage of entering, stable stage of turning and decreasing stage of exiting. According to the overall change trend of 85 th percentile value of lateral acceleration, the lateral acce-leration can be divided into four variation modes. The 85 th percentile value of left and right lateral acceleration is 3.85 m/s² and 3.69 m/s² respectively. Compared with the general curve, the driver can tolerate a higher degree of lateral discomfort in the curve. In the process of left and right turns, the lateral peak acceleration of each turn is mainly concentrated between the middle point of the curve and the slow point of the circle, that is, the latter half of the circle curve. [ABSTRACT FROM AUTHOR]

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Copyright of Journal of Southeast University / Dongnan Daxue Xuebao is the property of Journal of Southeast University Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)