[Noise caused by street traffic: evaluation, predetermination and limits].

In evaluation of annoyance level due to road traffic, many criterions of noise exposure and degrees of basic adverse effect have been proposed through composite numerical values. In the present study procedures and units proposed by various AA. are recognizded and mathematical prediction models which correlate the influence of traffic density, composition, speed and geometry of road on emitted noise level are evaluated. At last limits of noise exposure levels set up in many countries or promulgated by Authorities with respect to the health and well being of man and in function of zoning urban areas, are referred.