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摘要: 以云南小磨路K109+600~K122+024路段上的隧道群、陡坡与混行路段为试验样本路段, 应用虚拟视景生成系统建立了路段三维静态与动态模型。在隧道内设置倒伏示警柱、视觉标线与常规标线3种中央隔离设施, 在爬坡路段与混行路段上均设置附加车道, 对比分析了3种路段上的平均车速与车辆平均横向位置, 并评价了3种安全保障措施的效果。分析结果表明: 在隧道内, 3种中央隔离设施下的平均车速标准差分别为9.74、10.01、10.40 km·h-1, 车辆平均横向位置标准差分别为0.54、0.70、0.69 m, 说明设置倒伏示警柱后, 车辆保持较好车速和横向位置; 在爬坡路段上, 当交通流量不超过1 000 pcu·h-1时, 设置附加车道有利于主线路车辆车速的提高; 在混行路段上, 当非机动车流量分别为500、800 pcu·h-1时, 设置附加车道后, 车速增大, 车速标准差减小, 车辆横向位置变大, 说明设置附加车道有利于提高和稳定车速, 并可减少与对向车辆的冲突。Abstract: The tunnel group, climbing section and mixed traffic section of Yunnan Xiaomo Highway from K109+600 to K122+024 were selected as experiment sample sections, and their static and dynamic 3D models were established by using virtual scene generation system.Central isolation installations such as lodging warning column, visual marking, conventional marking were placed in tunnel, and additional lane was set at climbing section and mixed section.The average speeds and lateral positions of vehicles at three sample sections were comparatively analyzed, and the effects of three safety safeguard measures were evaluated.Analysis result indicates that in tunnel, the average speed standard deviations for three central isolation installations are 9.74, 10.01, 10.40 km·h-1 respectivehy, and the average lateral position standard deviations are 0.54, 0.70, 0.69 m respectivehy.It can be seen that by setting lodging warning column, the speed and lateral position of vehicle can keep well.When traffic volume is less than 1 000 pcu·h-1 at climbing section, it is beneficial to improve vehicle speed on main line by setting additional lane.When non-motor vehicle volumes are 500 and 800 pcu·h-1 at mixed traffic section, there are higher speed, smaller speed deviation and bigger lateral position after setting additional lane.Setting additional lane is beneficial to improve and maintain vehicle speed, and reduce conflicts to opposed vehicle.
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Key words:
- traffic safety /
- montane highway /
- driving simulation /
- virtual scene /
- isolation installation /
- additional lane
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