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山区公路交通安全保障措施模拟评价

, PP. 120-126

Keywords: 交通安全,山区公路,驾驶模拟,虚拟视景,隔离设施,附加车道

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Abstract:

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、10.40km.h-1,车辆平均横向位置标准差分别为0.54、0.70、0.69m,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1000pcu.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、800pcu.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。

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