高速公路出口匝道与地面道路衔接部的几何安全设计研究综述

Overview of the Geometric Design Research on the Off Ramp and Street Junction on Freeway Considering Safety

高速公路出口匝道与地面道路衔接部的几何安全设计是高速公路出口匝道几何安全设计的核心内容。本文通过分析国内外出口匝道与地面道路衔接部几何安全设计研究成果,从衔接部的接入间距设计、视距设计、转弯缓冲区的设计、渠化设计和控制方式选择等方面进行了探讨,指出了我国现行规范中衔接部几何安全设计的局限性。最后,文章建议借鉴国外已有的衔接部几何安全设计的实践经验,研究适合我国国情的衔接部几何安全设计方法,为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提供必要的理论支撑和技术依据。

Geometric design of freeway off ramp-street junction is a very important part in freeway off ramp geometric design. The latest research on it was analyzed from the following aspects：terminal access spacing, sight-distance design, left-turn and right-turn design, channelization design and the traffic control selection. According to the insufficiency of the exited regulation in China and the relative successful practice abroad, we thought that proper geometric design methods of it could provide technology and theoretical support for the junction＇s safety and capacity improvement.