COPERT4 road transport emissions model 

COPERT 4 is a software program aimed at the calculation of air pollutant emissions from road transport. Scientific research underpinning the model is supported by the European Commission's Joint Research Centre (JRC). COPERT has been developed for use by national experts to estimate emissions from road transport to be included in official annual national inventories. However, it is available and free for use in any other research, scientific and academic applications.