VTI conducts annual, national exhaust emissions estimations by order of Trafikverket, the Swedish Transport Administration. The estimations are done in the software programme, HBEFA 3.1.
With these annual estimations, we follow the development of road traffic exhaust emissions, and submit the information to Swedish public statistics.
We can also apply the simulation model in other assignments to estimate traffic energy and emissions and evaluate measures in the traffic system of national, regional and local character. VTI has, for example, evaluated the so called Stockholm trials, where we made an overview of the city's traffic patterns and the effect on exhaust emissions when introducing a congestion tax.