文章编号：1672-5328（2011）06-0020-08

蔡　军，李彻丽格日，滕少洁
（大连理工大学建筑与艺术学院规划系，辽宁 大连 116024）

摘要：重视直行交通、忽视甚至排斥左转交通是造成道路设计不合理、干路与支路难以衔接的内在原因。首先选取美国、日本大量典型城市道路案例，总结其设计取向为注重转向交通组织。提出干路左转空间需求的计算方法，包括干路交叉口和干路路段两部分左转空间需求。指出中国城市道路左转交通需求趋于增加，在道路设计和交通组织中应给予重视。最后，分析中国城市道路左转交通组织设计取向的弊端及其与国外的差异，提出采用双幅路断面、奇数断面模式组织左转交通的建议。

关键词：道路设计；左转空间需求；干路；交叉口；路段

中图分类号：U412.37

文献标识码：A

Space Needed for Left-Turns on Arterial Roadways

CAI Jun, LI Che-li-ge-ri, TENG Shao-jie
(Department of Urban Planning, School of Architecture & Fine Art, Dalian University of Technology, Dalian Liaoning 116024, China)

Abstract：Emphasizing through traffic and neglecting left-turn traffic is mainly responsible for unreasonable road design and poor connections between arterial and local roadways. Based on a large number of cases from the typical urban roadways in the U.S. and Japan, this paper summarizes that roadway design in these countries do consider left/right turn traffic needs. The paper presents a methodology of calculating space needed for left-turns on arterial roadways, including two parts of space at intersections and roadway segments. By recognizing increasing left-turn traffic in China, the authors point out that the left-turn space should be emphasized in road design and traffic organization. Finally, through analyzing the disadvantages of current traffic control for left-turn traffic in China and the difference from other countries, the paper proposes traffic control for left-turns with double cross-section roadway design and odd number of cross-section design in China.

Keywords：road design; space needed for left-turns; arterial roadway; intersection; roadway segments