The NMPB-Roads-2008 is the French road noise prediction method leading on from the NMPB-Roads-1996. It is designed for both road project impact studies and for noise mapping in application of Directive 2002/49/EC.

This document is intended for both users (design offices, State departments) and software program publishers. It specifies the breakdown of a linear infrastructure into point sources, the micrometeorological characterisation of a site, the search for elementary trajectories and the calculation of the attenuation in an elementary trajectory. The probabilities of occurrence of favourable conditions are tabulated for 41 stations spread across France.