• Environmental speed limits : do temporary speed limits improve air quality? 

      Westby, Benjamin S.; Folgerø, Ingrid Kristine (Master thesis, 2017)
      In 2004, Oslo introduced a policy that involved a temporary reduction in the maximum speed limit of 20 km/h (80 – 60 km/h) during the winter. The aim of this policy was to improve local air quality in order to reduce the ...