The Micro-Simulation Of The Urban Roads With Multi-Intersection Based On The Traffic Flow In Accordance With The Law Of Poisson

With the accelerating of urbanization process,traffic congestion has become one of th e main issues in the entire society.In order to control traffic congestion,many cities choos e encryption road network,such as widening road and increasing the number of lights.Nev ertheless,these measures often understand the effect after the construction,many are expen sive with little effect.Microscopic traffic simulation,as a kind of combined with computer simulation technology,can simulate actual traffic in a computer environment.Thus traffic study,does not require the participation of the actual traffic,therefore when it comes to saf ety,economy and practicality has a big advantage.In order to simulate the actual traffic,th is paper designed a microscopic traffic simulation software which can show the dynamic tr affic images.First of all,in the second chapter,this paper analyzed the demand for microscopic traffic s imulation,and subsequently the integrated function of the traffic simulation system was pu t forward.Afterward put forward the overall design of the system,finally determine the ma in task of this paper.Second,in the third chapter,the paper analyzing the characteristics of the traffic flow distribution and point to,put forward the feasibility of grid model based on the theory of th e Poisson distribution.And the grid model has carried on the theoretical analysis and form ula derivation,makes the vehicle arrive with Poisson distribution.The following model is i ntroduced and the formulas and is applied to the microscopic traffic simulation system.;in the fifth chapter,the paper introducing the car-following model,signal lamp module and lane-changing model.Succeeding,in the fifth chapter,based on the overall design scheme,follows a modula r design thought,the various modules of the system software design were carried out.The f unction of each module are as follows:grid model is produced in each road network port in conformity with the Poisson distribution of traffic flow.Following model is the vehicle to enter the network,when the car speed is greater than the speed of a driving behavior.Lane changing model can describe the lane changing behavior of vehicles within the network.Finally,the microscopic traffic simulation system is analyzed in commissioning and v alidation.Of road network from the system reads the.net format files and map network,to t he grid model based on network file test road port number and location coordinates,and at the port produce vehicles.Out of vehicles are driven into the road network,following beha vior is processing,to the light in front of the vehicle and the slow dynamic space-time trans formation of picture processing,all are verified analysis.After preliminary debugging expe riment demonstrates that the system realized in Poisson distribution of traffic flow under th e action of many intersections of city roads microscopic traffic simulation functions.Not o nly can describe a real real traffic,but also has high research value.