The estimation of vehicle-related air pollution is based on European and national legislation. In most cases of the calculation of vehicle related air pollution it is to prove that the conditions of 39. BImSchV or Directive 2008/50/EC are maintained. This VDI Standard defines quality assurance measures concerning the performance and presentation of dispersion calculations in accordance with vehicle related air pollution. The moving or the static traffic can be the object of these examinations. The scope of this standard extents from the analysis of single section of roads to the calculation of the air pollution of relevant urban road systems. According to t