基于驾驶安全舒适性的山区双车道速度限制研究

为综合考虑山区双车道行驶安全舒适性对速度的限制,基于交通安全工程理论,采用多元非线性数值回归分析技术,探讨了平曲线半径R、坡度i、坡长l与事故当量损失率P的相关关系及P、弯道速度V与心率增长率N的相关关系,建立了道路线形安全性评价模型和驾驶员行驶舒适性评价模型,并在对模型进行显著性检验及可靠性验证的基础上,推导限制安全舒适速度V。结果表明:在安全性最高的一般弯、坡路段阈值P=80、N=20%时,V=35 km/h达到最佳行驶安全舒适性;在安全性最低的急弯、陡坡路段阈值P=498、N=40%时,V=10 km/h为最大限制速度。

Research on Speed Limit of Two-lane Highway in Mountain Area Based on Traffic Safety and Riding Comfort

The speed limit of two-lane highway in mountainous area is of crucial importance to its security and riding comfort.Based on the theory of traffic safety engineering and using method of multielement nonlinear regression,the article discusses the correlativity of plane curve radius R,slope i and length of slop l with loss ratio P of the accident equivalent,and the correlativity of P,curve speed V with fluctuating rate of heart rate N,sets up the road alignment security evaluation model and he driver riding comfort evaluation model,and deduces the limited speed V of comfortable security on the basis of the significance test and reliability validation.The result shows that V=35 km/h achieve the optimum driving security and comfort when threshold value P=80,N=20% in the highest security of general curved and sloping roads,and V=10 km/h is the maximum speed when threshold value P=498,N=40% in the lowest security of the sharp curved and steep sections.