This paper concerns choosing the best software for road noise simulation. Three independent parts of roads were analysed using three calculation programmes based on three mathematical models. The results of conducted measurements and analyses proved how important the selection of the right calculation programme for each numerical traffic noise simulation is. One should also be careful when choosing a calculation programme for rare traffic situations, such as bus terminals or transport bases. Despite striving to create an ideal calculation model for traffic noise considering the large number of changeable acoustic and non-acoustic parameters, engineers should also be informed about the criteria of usefulness of a programme (model) for a certain road situation.