The role of mutual screening by vehicle bodies in traffic noise propagation throughout a built-up area

In the presented paper the free emission in the road space is replaced by emission disturbed by other vehicles' presence. To consider their influence, the effect of mutual screening by vehicle bodies is included. The disturbed noise emission, when neighbouring vehicles are treated as semitransparent screens, offers a fully satisfactory agreement with field measurements for the case of a smooth façade. A noticeable improvement has been obtained for a shaped façade with a few meters depression in it. In the last case, the satisfactory agreement with field measurements has been reached when the proper reflection coefficient of the walls has also been assumed.