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八车道高速公路互通式立交最小净距计算模型

, PP. 31-37

Keywords: 道路工程,八车道高速公路,最小净距,可接受间隙,概率论,微分法,动力学

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Abstract:

为解决目前路线设计规范中互通式立交最小净距规定值不适应八车道高速公路的问题,避免因互通式立交间距设置过近造成的交通紊乱和交通安全问题,通过分析八车道高速公路小间距互通式立交间车辆的运行特征和变道行为,构建了八车道高速公路互通式立交最小净距计算模型;运用概率论、微积分、可接受间隙理论及运动学相结合的方法,从等待和追赶可插入间隙角度分析了车辆从外侧车道换道至内侧车道、从内侧车道换道至外侧车道所需的长度,并结合现场调查数据对模型的关键参数进行了界定。结果表明八车道高速公路互通式立交最小净距值宜为2.2km。

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