|Authors:||Rolf Hagman, Christian Weber, Astrid Helene Amundsen|
|ISBN (digital version):||978-82-480-1624-3|
The air quality in several Norwegian cities don’t comply with the limit values for NO2. The EFTA control body, ESA, has criticised Norway for allowing high concentrations of NO2 and for not doing enough to reduce the problems. On behalf of TØI, VTT in Finland performed exhaust emission tests in a certified laboratory. The tests show that buses and Heavy Duty Vehicles, HDV with new Euro VI certified engines have very low emissions of Nitrous Oxide, NOx and exhaust Particulate Matter, PM. The reductions are over 90 % compared with earlier generations of HDVs. New Euro 6 light vehicles with diesel engines still have a problem with high emissions of NOX. New knowledge make it possible to implement more accurate measures, when reducing emissions of NOX and PM from road traffic is needed.