Research On Traffic Joint Technology Of Urban Complex Internal And External Spaces Based On Access Management

With the development of land in the process of urbanization increasing,the impact of urban complex on the traffic of surrounding roads gradually becomes prominent as an important component of land plots.Urban complex affects urban traffic from many angles,among which the key factor is the connection space interior and exterior the urban complex.At present,there are few researches on the interior and exterior traffic convergence space in the city complex.Most analyses of interior and exterior space traffic are independent.There is seldom theory of internal and external traffic connection.In order to reduce the traffic impact of the city complex and improve the traffic flow efficiency of the complex convergence space,based on the access management technology and the microscopic traffic analysis,this paper put forward the traffic convergence technology inside and outside the city complex.The specific research work is as follows:(1)Study on the Site Selection Urban Complex Driveway:Based on the measured data and the analysis of the traffic flow characteristics at the driveway of complex and the upstream and downstream municipal roads,In this paper,a traffic cellular automata model for the convergence area of complex was established.Through Matlab modeling and simulation,the space-time map of the arterial traffic under the influence of the driveway was drawn,and the scope of the influence zone of the driveway was calibrated.Finally,considering the influence area of the driveway of the complex and the constraints of the site selection,the method of the location of the driveway was proposed.(2)Geometric Elements Design of Driveway of Dity Complex:By analyzing the influence of vehicle deviation on the driver’s perception of the operation behavior of the driveway capacity,the model of minimum width of driveway based on driver closed-loop feedback psychology was established.By studying the confluence of right turn car at the driveway,an algorithm based on the maximum width of driveway was established.Combined with the analysis of vehicle turning trajectory,the formula of turning radius at the driveway of the complex was deduced by using the principle of vehicle stability control.Based on the above model,taking the delay as an index,an optimization model of the correlation between driveway width and turning radius was established.(3)Research on the Coordinated Control Method of the Arterial Road Linked to Urban Complex:Based on the layout and design of driveway,this paper quantitatively analyzed the delay of traffic flow on the arterial road linked to urban complex,a queuing algorithm with consideration of the influence area of driveway was proposed,then the optimization method of coordinated control parameters for the convergence of t arterial roads was given.Finally,through the analysis of the function of green wave bandwidth and delay,the objective function was solved by using genetic algorithm to maximize the number of vehicles passing through the green band.(4)Case Study:Taking a city complex in Fuzhou as an example,this paper analyzed and verified the city complex driveway selection,geometric elements design and convergence road signal linkage control algorithm proposed by simulation.The result of example verification showed that after the optimization of the 3 schemes,including the location and geometric space design of the driveway,and the coordinated signal control of the connected road,the delays and number of stops in the area gradually decreased,and the overall optimization of the three schemes was better than that of the single optimization,The results of this study can be used to improve the traffic organization and signal timing of convergence area,and it’s helpful to improve traffic safety and efficiency in traffic connection area of urban complex.This study has certain value of application and in-depth research.