Motorring 4 (O4) is a motorway

ring road A ring road (also known as circular road, beltline, beltway, circumferential (high)way, loop or orbital) is a road or a series of connected roads encircling a town, city or country. The most common purpose of a ring road is to assist in reducin ...

that runs from Ishøj to Ballerup. It is followed by Ring 4 which goes on to Kongens Lyngby. The motorway connects the motorways Køge Bugt Motorway, Holbæk Motorway and Frederikssund Motorway. In November 2003, a majority in the

Folketing The Folketing ( , ), also known as the Parliament of Denmark or the Danish Parliament in English, is the unicameral national legislature (parliament) of the Kingdom of Denmark — Denmark proper together with the Faroe Islands and Greenland. E ...

agreed on a traffic package, which meant that the drafting of a decision-making basis for expanding the motorway from 4 to 6 lanes had to be initiated. In July 2009, a significant part of the decision-making basis for a construction act was completed for approx. 4 km long stretch between Motorvejskrys Taastrup and the connecting facility between Motorring 4 and Frederikssund motorway. The expansion was to be completed in about 5 years, of which the last 3 were construction work. The motorway was laid out with an extra-wide central relief with trees, which should tie the forest landscape together across the motorway. Therefore, the expansion can be carried out by extension with tracks in the existing central rebate.Vejdirektoratet, 2009, Rappport 327 �
Udbygning af Motorring 4 fra Taastrup til Frederikssundmotorvejen, VVM-redegørelse, Sammenfattende rapport
, , s. 11

References

{{reflist Ring roads in Denmark