“Norra Länken april 2015a” by Holger.Ellgaard – Own work. Licensed under CC BY-SA 4.0 via Wikimedia Commons (Link)
Northern Link (Norra Länken), one of Northern Europe’s largest road tunnel project, is expected to have very large positive effect on air pollution and noise levels along densely trafficked roads in parts of the inner city of Stockholm. Environmental and health gains are expected to be large as almost all heavy traffic and a lot of car traffic use the tunnels under the ground, which is expected to bring major reductions in air pollution and noise on busy streets.
The aim is to quantify the effects on vehicle emissions, air quality and public health in connection with the opening of the Northern Link. Measurements in combination with model calculations will form the basis for a health impact study, which aims to study the health indicators that may change fairly soon after exposure will change, but at the same time are indicators of serious chronic effects.