A new Nordic method to predict road traffic noise is proposed. It is based on a complete

separation of source emission and sound propagation. Each vehicle is modelled as a

number of point sources each with a certain sound power with or without directivity. The

source model is connected to point source sound propagation theory to yield the sound

pressure level in an arbitrary receiver position. The propagation model is based on

accurate analytical models and it is capable of predicting propagation effects both with

and without the influence of meteorological parameters.