基于VISSIM仿真分析在城市旧路网改造中应用研究

Research on Application of VISSIM Simulation Analysis in Reconstruction of Urban Old Road Network

在构建新发展格局城市高质量发展大背景下,城市路网改造提升成为城市道路发展的必经之路.城市旧路改造项目通常只基于一条道路修复需求,缺乏对片区交通的整体统筹考虑.随着全过程工程总承包的推进,城市旧路已经不是单独一条路或几条路的改造及更新,而是以片区统筹思维进行路网改.因此,对改造道路及其项目周边区域的交通体系造成强有力的冲击.通过引入VISSIM微观交通仿真软件,动态模拟仿真城市一个片区道路网改造前后的交通效益,根据平均延误、交叉口配时方案、平均排队长度和服务水平等评价指标,评定该路网是否需要改造、改造方式和实际的改造效果,进而提出城市区域统筹提档升级和周边路网的改善措施,并加以验证.最终实现城市更新与城市交通的协调发展.

Under the background of building a new development pattern and high-quality urban development,the reconstruction and upgrading of urban road network become the only way for the development of urban roads.Urban old road reconstruction projects are usually based on one road repair needs only,and lack of overall planning consideration for regional transportation.With the advancement of the whole-process project general contract,the old urban roads are no longer a single road or several roads to be rebuilt and renewed,but the road network is rebuilt with the thought of regional overall planning,which will have a strong impact on the road reconstruction and the traffic system around the project.By introducing the VISSIM microcosmic traffic simulation software,the traffic benefits before and after road traffic reconstruction in the simulated area of a city are dynamically simulated.Whether or not to reconstruct,the reconstruction mode and the actual reconstruction effect of this road network are evaluated according to the evaluation indexes of average delay,intersection timing scheme,average queuing length and service level.Then the improvement measures of overall planning and upgrade of urban region and surrounding road network are put forward,and verified.Finally,the coordinated development of urban renewal and urban traffic is realized.