Study On Traffic Simulation And Enclosure Optimal Arrangement Of Urban Water Environment Control Project

Lucid waters and lush mountains are invaluable assets.Water pollution is one of the main reasons restricting the construction of urban ecological civilization.In recent years,the water environment treatment project has been built at a relatively fast speed.The water environment treatment project has received strong support from the state,and the restoration of the water environment has achieved good results.However,in the urban water environment treatment project,the pipe network,the river channel,and the box culvert transformation,reconstruction and new construction projects need to occupy road resources for construction.The large-scale construction of roads will have serious negative impacts on urban traffic that originally contradicted supply and demand,affecting the normal travel of residents and construction progress.Therefore,this paper carries out a study on the impact of large-scale road-occupying construction on urban traffic,analyzes the impact of different construction enclosure plans on traffic operation,and chooses a better construction enclosure plan for construction.Firstly,due to the large construction scope of water environment control project,the scope,time period and content of traffic flow investigation are determined.By analyzing and comparing the advantages and disadvantages of various traffic data acquisition methods,it is decided to adopt the method of combining manual acquisition and video post-processing to collect traffic flow data at the construction site.Secondly,the VISSIM simulation software is used to establish the microscopic traffic simulation model,and a series of indicators for evaluating the service level of road sections are simulated and calculated,including queue length,average speed,occupancy,average parking times,average delay and other indicators.The basic parameters of driving behavior are checked by orthogonal experiment method.The best correlation between simulation results and actual data is selected as the final set of checking parameters.The set of checking parameters is input into VISSIM software to better simulate the local traffic conditions in the construction area and minimize the error between simulation results and measured traffic data.Thirdly,sensitivity analysis is carried out on the parameters of construction enclosure layout.According to the sensitivity degree of each construction enclosure layout parameter to traffic,the initial construction enclosure layout scheme is optimized.By comparing the impact of different optimization schemes on traffic,the better construction enclosure layout scheme is selected to minimize the impact of road occupation construction on Municipal traffic.Finally,using four indicators of road saturation,average speed,average traffic delay and average parking times,the dynamic comprehensive evaluation of the construction section is carried out.The road service level is divided into five levels: very smooth,unimpeded,moderate,congested and very congested.The evaluation criteria of the road service level are established.Combining with the construction of road occupancy in Maozhou River Basin of Shenzhen City,this paper studies the construction of road occupancy in the third bidding section.By using traffic simulation software VISSIM to establish road network and enclosure model,the traffic situation in the construction area is simulated,the influence degree of large-scale construction enclosure on traffic is analyzed in depth and systematically,and the advantages and disadvantages of the original construction enclosure scheme are predicted.With reliability,it can further guide the formulation and optimization of construction enclosure scheme.