雨天高速公路安全车速及关闭标准研究

Research on Expressway Safe Speed and Closure Standard in Rainy Day

由于道路交通环境对车辆通行及安全影响的复杂性,很多标准规范既有其较好的适用性,又有其脱离实际的地方,往往多是根据管理经验确定公路安全车速和关闭的标准,缺乏量化的依据与合理性.为此,采用定性与定量相结合的方法,分别建立了降雨强度与水膜厚度、能见度以及路面摩擦系数的关系;通过比较弯道路段车辆侧滑与安全制动距离下的临界车速,建立了不同降雨强度下的高速公路安全临界车速计算模型.以某路段为例,给出了不同降雨强度下的安全车速和相应的交通管制措施.研究结论为高速公路交通管理部门开展安全运营工作提供了可行方法和现实的依据.

Because of the complexity of the road traffic environment on the vehicles and security implications,many management standards are good applicable as well quite impracticable. The relationship between rainfall intensity and thickness of water film visibility and road surface friction coefficient are established,by using a combination of qualitative and quantitative methods. The model of highway safety critical speed is building up under different rainfall intensity by comparing the curve road vehicle sideslip and safety critical speed under braking distance. In case study,the safe speed and the corresponding traffic control measures are given quickly. It provides a useful tool and practical basis for the highway traffic management departments to carry out safety operation measures.