A new prediction model for A-weighted equivalent level produced by road traffic is presented. It is based on the supposition that the distribution of vehicles on the road is describable using a Poisson distribution and that vehicle sound emission is nondirectional (monopole). These conditions are realized if the traffic flow is lower than about 600 vehicles/h and vehicle speed is higher than 8.3 m/s. Equations are supplied for application of the model to one and two lane roads. The error associated with the proposed model has been calculated using a classical propagation of errors approach. A series of measurements have been carried out on different roads to verify the model. The relationship between the calculated and measured data has been quantified using a linear regression with a resulting correlation coefficient of 0.98. An extension of the model is proposed to include situations when the vehicles move at a speed slower than about 8.3 m/s. In such situations the noise emission of a single vehicle i s supposed to be directional in line with the direction of motion (dipole). A comparison between monopole and dipole models is presented for some example cases.
Technical note: A statistical model for predicting road traffic noise based on poisson type traffic flow
Noise Control Engineering Journal ; 49 , 3 ; 137-143
2001
7 Seiten, 10 Quellen
Aufsatz (Zeitschrift)
Englisch
Semi-poisson model of traffic flow
Engineering Index Backfile | 1968
|Smart city: road traffic evaluation based on traffic flow model
British Library Conference Proceedings | 2022
|