城市立交的主流型式——单点菱形立交的设计与应用

本文针对目前我国大、中、小城市最常使用菱形简易立交的交通特征和主要问题作了详细分析 ,据此提出以单点菱形型式改进常规菱形立交 ,从几何设计、交通效率、安全行车及交通组织管理各方面采用技术措施 ,大幅提高立交的交通适应性 ,并以应用实例展示了单点菱形立交型式在城市路网建设中的重要地位和作用。研究采用的交通工程设计方法 ,综合了城市建设、运营、管理和可持续性发展需要 ,所遵循的设计理念具有示范效用

Main Type of Urban Grade Separations-Design and Application of Single Point Rhombus Grade Separation

The paper analyzes in details the traffic characteristics and the main problems of the rhombus simple grade separation used at most in great, middle and small cities in China now. And it puts forward to improve the regular rhombus grade separations by single point rhombus type. And it takes the technical measures in various aspects such as geometric design, traffic efficiency, safe running and traffic organization and management etc. so as to enhance greatly the traffic adaptability of the grade separation. It also shows the important position and role of single point rhombus grade separation type in the construction of urban road network through the applied examples. It studies on the design method used in traffic engineering. It summarizes the need of the urban construction, operation, management and continued development. The followed design idea has the demonstration effectiveness.