Were traffic restrictions in Madrid effective at reducing NO₂ levels?

In this paper the authors assess the effectiveness of the introduction of Madrid Central, a low-emission zone (LEZ), to improve air quality in the centre of Madrid. The authors take advantage of this policy change to identify the effect of the application of an LEZ on NO₂ concentrations. The authors' findings provide evidence that the introduction of Madrid LEZ has had a positive impact on reducing NO₂ emissions, as measured by Plaza del Carmen’s monitoring station. Furthermore, monitoring stations located near to Madrid LEZ also exhibit significant, though smaller, reductions in NO₂ levels. These results suggest that there was a positive spillover effect and that pollution was not transferred from the city centre to other nearby areas. Instead, it seems that citizens in Madrid actually changed their transportation habits.


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  • Accession Number: 01767734
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jan 14 2021 5:01PM