Road transportation emission inventories and projections – Case study of Belgium: Methodology and pitfalls

Abstract This paper quantifies the effect of a number of input parameters on the emission levels of road transport emissions calculated by means of a bottom-up methodology. The input parameters considered cover small diesel cars, calculation of additional fuel consumption due to the use of mobile air conditioning in passenger cars and light commercial vehicles, fine-tuning of trip lengths and definition of road types for Belgium in 2010. The effect is significant for CO 2 , and even more pronounced for other pollutants such as NO x , PM 2.5 , and VOCs.