This thesis wants to present the reduction of air pollution caused by traffic by implementing certain actions. This topic takes importance after that the law 2008/50/EC was passed and the countries and concretely the cities have to fulfill with it. To introduce the reader a description of the air quality situation in the Brunswick, which is the city where the scenario of the simulation is implemented, has been done in the section 4. The actions are selected from the database MARLIS and are explained in the section 5. A pruning of this database has been done by the reason as not all the actions can be implemented in this thesis for reasons, explained below. The software SUMO (Simulation Urban Mobility) which is the informatics tool to perform the simulation is explained in the section 6. The section 7 explains how have been implemented the selected actions in to the simulation, and the section 9 shows the results of the simulation. In the section 10 are presented the conclusions. The actions selected are to set a Tempo 30, an Environmental zone. The goal of this thesis is to show the effect of these actions and compare them with the examples of similar actions extracted from MARLIS and also find out if it is a proper action to be implemented.

Outgoing