冰雪条件下城市快速路线形设计优化方法研究

Study on Optimization Method for Alignment Design of Urban Expressway in Snow Region

在北方冰雪地区,冬季降雪严重影响快速路交通流的运行,导致交通拥堵和交通事故率增加,针对该问题,考虑北方冰雪地区冬季可能出现的不同路面条件以及机动车行驶安全,借鉴城市道路设计中的线形设计方法,提出了北方冰雪地区快速路设计的优化方法,分析了最大设计坡度和最长坡长限制,为北方冰雪地区的快速路设计提供了理论依据。

In the northern snow areas of China, the winter snowfall seriously affects the traffic flow of the expressway, which will result in the increment of traffic congestion and traffic accident rates. Aiming at this problem, the paper considers the different road conditions maybe occuring in the northern snow areas, and the safety of motored vehicle. Refering to the alignment design methods in design of urban road, the paper puts forward the optimization method of expressway design in the nrothern snow areas, and analyzes the limitation of the maximum design grade and the maximum grade length, which provide a theoretical basis for the design of expressways in the northern snow areas.