The Copenhagen low emission zone (Miljozone) Copenhagen is the first of the low emission zones established in Denmark. The low emission zone started in 2008 and initially applied only to domestically registered vehicles. The low emission zone mainly concerns the centre of Copenhagen and the municipality of Frederiksberg. In order not to hinder commercial traffic/ferry traffic to and from Copenhagen too much, a transit route from North Havnen passes through the low emission zone. In addition to Copenhagen, the registration obligation in Denmark also applies to the low emission zones Aalborg, Aarhus and Odense. A violation can be punished up to 1,700 euros.

The low emission zone (Miljozone) Aalborg was the second low emission zone after Copenhagen to be established in Denmark. The low emission zone in Denmark's fourth largest city was established at the beginning of 2009 and initially applied only to domestically registered vehicles from Euronorm 3 upwards. The low emission zone mainly concerns the centre of Aalborg. The zone is limited in the east by the E45 along the east side of the city to the end by the Limfjord on the north side. Vestebro Street in Aalborg is marked as a transit route and is not part of the low emission zone.

The low emission zone (Miljozone) Aarhus was the third low emission zone established in Denmark after Copenhagen and Aalborg. The low emission zone in Denmark's second largest city was established in 2010 and also initially applied only to domestically registered vehicles. The low emission zone is located on the Aarhus Bay of the Kattegat, which lies to the east of the city. The low emission zone is then essentially enclosed by the Ring Road 1 in a southern, western and northern direction. Traffic to Denmark's largest container terminal via the B 1 trunk road is not part of the zone.

The low emission zone (Miljozone) Odense was the last of a total of four established low emission zones in Denmark. The low emission zone, which is located in the Syddanmark region on the island of Funen, was established in 2010 in Denmark's third largest city. Initially, the low emission zone only applied to domestically registered vehicles. The geographical boundaries of Odense's low emission zone are located within the city of Odense's Ring Road 2 (Ring 2). It should be noted that the swing bridge Odins Bro, which crosses the canal, is also within the low emission zone.