The objective of the project is to conduct air quality calculations with the OML-Higway along alternative motorway routes of a third crossing of the inlet ’Limfjorden’ in the northern part of Jutland. The impacts to the air quality in selected streets in the city of Aalborg as a consequence of changes in traffic re-routing will also be evaluated. The impacts of nitrogen deposition to special areas of protection and conservation will also be assessed. A technical report will be prepared together with contributions to the EEA report for public hearing. The project is carried out for the Danish Road Directorate from November 2010 to May 2011.