In particular, the post-doc will be responsible for drawing up a model for calculating the dynamic emission of CO2, NOx, CO and PM10 by typical cars and trucks in Flanders. Such a model will give the instantaneous (1 second) emissions as a function of the (history of) velocity and acceleration, possibly supplemented with other relevant parameters. It will be used literature (largely hands), external models to acquire and own measurements VITO (VEDETT, VOEM). In addition, the post-doc will relate the VEDETT measurements of spatial features (typology) of the environment in which the test vehicles driving during the measurements.