Road traffic noise computer simulation model

In this paper, a computer simulation model for predicting roadside traffic noise is presented. This model will be input as micro -traffic data, for example, measured vehicle speed, category and arrival time, uses vehicle movement model to update each vehicle's running states in each time, utilizes vehicle noise model to calculate noise level produced by each vehicle according to its running states, calculates the whole noise of traffic flow. This model not only can comprehensively reflect time distribution characteristic of traffic noise, but also can predict and analyze noise evaluation indicator under complex transportation condition. Good agreement has been achieved between measured and predicted noise level value and the precise is -0.4±1.0 dBA.