The Handbook on "Emission Factors for Road Transport (HBEFA)" supported by several European environment agencies provides air pollutant and climate gas emission factors for all current road vehicle categories. The calculations for Germany are carried out by using the TREMOD transport and environment model. HBEFA is an important data source to explore overall emissions and air pollution. Particularly for forecasts of future air pollution and effects of political measures (e.g. Low Emission Zones) the HBEFA is very useful and thus has gained increased importance in the European policy context as well.
This project aims at achieving a further improvement of the HBEFA handbook. In addition to the prevailing components, a tool to calculate the emissions of air pollutants (mainly emissions impacting global warming) in the preparation of chain fuels is implemented. This is an important component with respect to the increased variety in energy supply: electrification, new fuels and gases. A correct statement about the emissions of different transport modes is possible only under consideration of upstream processes in fuel production.