Abstract: The innovation and upgrading of the automobile industry has promoted the wide application of the advanced assisted driving system, especially the new technologies represented by the lane departure warning system (LDWS) have furtherly reduced the traffic accidents caused by vehicles deviating from the lane. In order to explore the test and evaluation technology of LDWS suitable for Chinas road traffic characteristics, a real vehicle test on the objective performance of a passenger vehicle LDWS was carried out, and the influence of factors such as deviation direction, light condition, lane line type and lateral deviation velocity on the lateral distance of the alarm point (DW) distribution under the conditions of straight and curved road sections was analyzed. The results show that: in the straight road section, the influence of light condition and vehicle velocity on DW is small, while there is a negative correlation between the lateral deviation velocity and DW; in the curved road section, the distribution of DW when vehicles deviates to the inside of the curve is similar to that in the straight road section, but when the vehicle deviates to the outside of the curve, the alarm time is late. The research results enrich the application of LDWS test condition and evaluation technology.

摘要： 汽车工业的创新升级促进了高级辅助驾驶系统的广泛应用，尤其以车道偏离预警系统（LDWS）为代表的新技术正在进一步减少因车辆偏离车道造成的交通事故。为探究适合我国道路交通特性的LDWS的测试与评价技术,对某乘用车LDWS的客观性能进行实车试验，分析了直道与弯曲路段条件下，偏离方向、光照条件、车道线类型、横向偏离速度等因素对报警点横向距离DW分布的影响。结果表明：在直道路段，光照、车速对DW的影响较小，而横向偏离速度与DW之间存在负相关性；在弯曲路段，车辆向弯道内侧偏离时DW分布与直线路段相似，但是发生弯道外侧偏离时，报警时刻较晚。研究结果丰富了目前对LDWS测试工况与评价技术的应用。

关键词: 汽车工程, 乘用车, ADAS, LDWS, 测试工况, 报警点横向距离