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高速公路大、小车速度差与事故率的关系

Keywords: 高速公路,道路安全,速度,事故,回归分析

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Abstract:

回顾国外有关车速与事故之间的研究成果可以发现,事故预测模型一般只考虑了平均车速、速度的方差和速度梯度等指标,而对大、小车速度差与事故之间的关系研究并未涉及.基于中国高速公路上大车比例较大,且大车速度与小车速度差较大的特点,以一条高速公路连续3a的事故数据为基础,利用统计回归的方法研究了大、小车速度差与事故率之间的关系,建立了相应的回归模型.结果表明,大、小车的速度差是引起交通事故的重要原因之一,速度差和事故率之间呈正相关关系,即随着平均速度差的增大,事故率增大.

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