The thesis analysed the social consequences of a large-scale infrastructure project, the Stockholm Bypass, and what considerations was taken into social factors during the planning process. 

The results of GIS-mapping showed a strong correlation between an increase in air pollution in relation to low income, low participation in election, low education level, poor health and the high percentage of people with non-Swedish origin of birth. Because children are more sensitive to the long-term effects of air pollution, the correlation of pollution and population density of children was also analysed, which showed to have the strongest correlation of all factors analysed. The theoretical tools of environmental justice and environmental racism give a deeper understanding of the processes that lie behind these results, and previous research also showed this is no single occurrence by chance, but a structural problem within planning. 

Previous research has only partially showed which underprivileged areas will be affected, with a focus on the end of the blue line metro at Hjulsta and Akalla. But the areas of Vårby Gård, Skärholmen, Sätra, Hässelby gård and Vällingby will also be affected by high levels of pollution. This is the result of the deep tunnels that limit possibilities for ventilation shafts, and so the tunnels act as chimneys that concentrate the toxic air pollution in a few areas where the mouths of the tunnels are placed. 

Another aim of the thesis was to look for if such factors were considered in the documents related to the Stockholm Bypass. The lack of social perspectives stresses one of the most important conclusions in this thesis, a need for new guidelines and analytical tools when it comes to assessing social consequences of large infrastructure projects. The uneven distribution of air pollution in non-affluent residential areas and the impact on the children in these areas can only be concluded to be a non-issue within present planning, since these areas and the residents are today rendered invisible in the planning process. This responsibility should fall upon either Naturvårdsverketor Länsstyrelsen, that today both work with assessing the impact of infrastructure projects.