Mathematical Modeling and Numerical Simulation for Lntersection Traffic Flow

Using the basic characteristics of the traffic flow and discrete of numerical analysis,establish discretization urban road traffic flow mathematical model,such as vehicle formation model,car-following model,changing lanes model and so on,study of urban road traffic flow microscopic simulation numerical calculation method,based on the design of the analysis algorithm,reasonable correction regional traffic simulation parameters,using discrete grid method with C++ coding the urban traffic flow microscopic simulation program in Linux,build traffic flow numerical simulation platform,and through the calculation results and actual traffic survey data analysis and testing.The results show that:when to contain four intersection area of a city road network traffic flow of vehicles measured data as the initial conditions produce traffic flow numerical simulation,analysis from entry and exit section traffic of the simulation results and the measured data,the results show that the traffic almost the same,and when the calculation results tend to be stable,the road traffic fluctuate around a constant,and under the control of the signal light vehicle number in the network area fluctuate in a cyclical.