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以山区公路上设置的某一爬坡车道为试验对象,利用驾驶模拟试验对其交通特性及驾驶安全性进行仿真。根据设计图和现场环境构建了三维虚拟试验场景,通过VISSIM生成试验路段交通流;32名受试者在4种交通条件下进行了驾驶模拟试验;模拟过程中记录车辆的速度、轨迹、加速度、制动力等数据;通过VISSIM仿真试验确定了该爬坡车道的交通量阈值。分析结果表明,在常规交通流情况下,该爬坡车道可提高主路上的车速及其平稳性,同时可减少来自对向车道的冲突;但随着交通流量趋于饱和,其有效性逐渐减弱甚至产生负面影响。
Taking a climbing lane set on a mountain road as the test object, the traffic characteristics and driving safety are simulated by driving simulation test. According to the design drawings and the scene environment, a three-dimensional virtual experiment scene was constructed and the traffic flow of the test section was generated by VISSIM. The driving test of 32 subjects under the four traffic conditions was carried out. The speed, trajectory, acceleration, Braking force and other data. Through the VISSIM simulation test, the traffic volume threshold of the climbing lane is determined. The analysis results show that under conventional traffic flow conditions, the ramp can increase the speed and stability of the main road and reduce the conflict from the opposite lane. However, as the traffic flow becomes saturated, its effectiveness diminishes Even negative effects.