快速路出口衔接段交通影响分析及改善研究

Traffic Impact Analysis and Improvement Research for Urban Expressway Off-famp and Weaving Section

快速路是城市道路体系的“动脉”,随着中国城镇化发展水平的提高,许多快速路出口匝道实际通行能力无法满足交通流的整体需求,出现前后路网衔接等问题,造成前后端拥堵。对城市快速路和城市道路衔接区存在问题进行总结,对衔接区下游交叉口可能产生的影响进行分析,随后针对存在问题及影响提出相应改善对策,最后以南京铁心桥快速路东向西出口匝道衔接区为例提出相应改善方案。结果表明:提出的改善方案在一定程度上可提升快速路出口匝道的通行能力,缓解交通拥堵。

Expressway is the traffic artery of urban road system.With the improvement of China􀆳s urbanization development level,the actual capacity of many expressway off-ramps does not meet the overall demand of traffic flow,and there are problems such as the connection between the front and rear road networks,resulting in congestion at the front and rear ends.The research summarizes the existing problems of the urban expressway and the urban road junction area,analyzes the possible impact of the downstream intersection of the junction area,and then puts forward corresponding improvement measures for the existing problems and impact,finally,taking the junction area of the east-west exit ramp of Nanjing Tiexinqiao Expressway as an example,puts forward corresponding improvement plans.The results show that the improvement scheme proposed in the research can improve the corresponding road capacity to a certain extent,and alleviate traffic congestion.