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高速公路出口匝道与地面道路衔接部是高速公路与地面道路交通流转换的重要节点,研究其安全几何设计方法,对改善高速公路匝道出口区域内的交通流通行效率和交通安全具有重要的意义。本文在现场调研的基础上,分析了衔接部的交通流特性,明确了衔接部的交通流性质、车辆行驶速度、交通组成等方面的特点;然后,从衔接部的选位、安全几何设计的要点方面提出了衔接部的安全几何设计方法;最后,以山西省汾军高速公路出口匝道与340省道衔接部为例,进行了衔接部的安全几何实例分析。研究表明,本文提出的衔接部安全几何设计方法是一种简单实用、可操作性强的交通设计方法,它对我国现阶段衔接部的交通安全设计具有一定的借鉴意义。
The junction between freeway exit ramp and ground road is an important node in the traffic flow conversion between expressway and ground road. Studying its safety geometric design method is of great significance to improve traffic flow efficiency and traffic safety in expressway ramp exit area. On the basis of on-site investigation, this paper analyzes the traffic flow characteristics of the junction, clarifies the characteristics of the traffic flow at the junction, the traveling speed of the vehicle, the traffic composition and so on. Then, from the selection of the junction, the safety geometry design Points out the safety of the convergence of the geometric design method; Finally, the Shanxi Fenfen Expressway exit ramp and 340 Provincial Road convergence as an example, the convergence of the Ministry of the safety of the geometric examples. The research shows that the method proposed in this paper is a simple, practical and practical traffic design method, which has some reference to the traffic safety design of the current convergence department in our country.