平面交叉口定向匝道设置条件与技术经济评价
2021-04-14张梦凡韩宝睿杨震朱成琳黄媛
张梦凡 韩宝睿 杨震 朱成琳 黄媛



摘 要:利用定向匝道减少交叉口延误是缓解城市节点拥堵问题的手段之一,考虑到用地、资金和环境等约束,需要谨慎论证修建立体交叉口的适用性与条件。本研究针对城市内修建左转定向匝道的前期可行性,通过对其所需的道路条件、交通条件进行分析,利用VISSIM仿真得出修建匝道前后交叉口的延误、排放及燃料消耗量的差值,用拟定的标准交叉口估算定向匝道的修建费用,对比分析其经济性,得出快速评估修建左转定向匝道可行性的方法。该研究对改进城市立交规划可行性提出了新的思路。
关键词:定向匝道;适用条件;交通仿真;费用与效益;延误
中图分类号:U491.23 文献标识码:A 文章编号:1006-8023(2021)02-0104-06
Setting Conditions and Technical and Economic Evaluation
of Directional Ramp at Plane Intersection
ZHANG Mengfan, HAN Baorui*, YANG Zhen, ZHU Chenglin, HUANG Yuan
(College of Automobile and Traffic Engineering, Nanjing Forestry University, Nanjing 210037, China)
Abstract:Using directional ramps to reduce intersection delays is one of the means to alleviate the problem of urban node congestion. However, taking into account the constraints of land use, capital and environment, it is necessary to carefully demonstrate the applicability and conditions of constructing an interchange. This study aims at the preliminary feasibility of building a left-turn directional ramp in the city. It analyzes the required road conditions and traffic conditions, and uses VISSIM simulation to obtain the delays, emissions and fuel consumption of the intersection before and after the ramp. Estimate the construction cost of the directional ramp through the proposed standard intersection, compare and analyze its economics, and summarize the method for quickly assessing whether a left-turn directional ramp can be built. The study puts forward new ideas for improving the feasibility study of urban interchange planning.
Keywords:Directional ramp; applicable conditions; traffic simulation; expense and benefits; delay
收稿日期:2020-10-23
基金項目:江苏省自然科学基金资助项目 (BK20170932)
第一作者简介:张梦凡,硕士研究生。研究方向为交通规划与交通流特征。E-mail: zmf07@qq.com
通信作者:韩宝睿,博士,副教授。研究方向为交通规划与交通流特征。E-mail: hbr@njfu.com.cn
引文格式:张梦凡,韩宝睿,杨震,等.平面交叉口定向匝道设置条件与技术经济评价[J].森林工程,2021,37(2):104-109.
ZHANG M F, HAN B R, YANG Z, et al. Setting conditions and technical and economic evaluation of directional ramp at plane intersection[J]. Forest Engineering,2021,37(2):104-109.
0 引言
在城市道路网的平面交叉口中,左转车流增加了交叉口范围内冲突点的个数,并且占用主要的时空资源,导致交叉口通行能力受限[1]。且车辆类型与左转车比例有强耦合作用,尤其大型车左转时,转弯半径过大,容易造成严重的交通冲突[2]。若采用左转定向匝道,仅建一座跨线桥就可以实现消除大部分冲突点,不仅可以提高通行能力,还可以减少延误等。……
