update - a road tunnel below Åboulevard and then on below HC Andersens Boulevard

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Åboulevard in the late 19th century looking north with the river still at the centre

Bethlehem church designed by Kaare Klint was completed in 1938 but the apartment building dating from around 1900 is on the right on both the historic view and the photograph of Åboulevard now

 

A proposal for a major engineering project, to construct a traffic tunnel down the west side of the historic city centre, is now in doubt.

It would take underground much of the traffic that now drives along HC Andersens Boulevard, on the west side of the city hall, and is part of a plan to remove the elevated motorway at Bispeengbuen - bringing traffic into the city from the north - and this would make it possible to reinstate a river that flowed into the lakes that now flows through a covered culvert below Åboulevard.

From Jagtvej, at the south end of the elevated highway at Bispeengbuen, and following the line of Åboulevard to the outer side of the lake, is about 1.6 kilometres and, from the lakes, a tunnel running between Jørgens Sø and Peblinge Sø and on along the line of Gyldenløvesgade to Jarmers Plads and then down the full length of HC Andersens Boulevard and then under the harbour to Islands Brygge is another 2 kilometres so, including the proposed tunnel at Bispeengbuen, that would be between 4.5 and 5 kilometres of tunnel in total.

For comparison, in Oslo, the Festning tunnel - opened in 1990 to take traffic away from the square in front of Oslo city hall - and then an extension to the east - the Operatunnelen completed in 2010 - form, together, about 5.7 kilometres of underground motorway.

The landscape and architecture studio Tredje Natur and the engineering specialists COWI have drawn up a feasibility study for the proposed scheme for the finance directors of the city and of the municipality of Frederiksberg - the road runs between the two areas.

Reinstating the river and extensive landscaping would be an important part of storm water protection for the low-lying areas of Frederiksberg with planting, surface drains, and culverts controlling storm floods before taking it away from the area in substantial storm drains in the bottom half of the tunnels below the road decks in the upper half of the tunnel.

Tredje Natur have produced drawings for the planting that would be possible along HC Andersens Boulevard if the heavy traffic that uses the road is taken down into a new tunnel. There could be a narrow road for local traffic, an open water course and extensive planting.

Tredje Natur

 

a suggestion for new landscaping along HC Andersens Boulevard proposed by Tredje Natur

1 south end of the boulevard looking south towards Langebro with the Glyptotek to the right
2 looking north from the Glyptotek with Tivoli to the left and the city hall to the right
3 from the south-west corner of the city hall square
4 crossing the city hall square heading north
5 the north end of HC Andersens Boulevard looking to to the tower of Realdania on Jarmers Plads

the map was published in 1860 and shows the river flowing into the lakes at the south end of Peblinge Sø with the road on the south bank and just a narrow lane, Aagade, at the back of gardens on the north bank

the river was moved down into a culvert and Åboulevard - the road above the culvert - is now wide and busy with traffic to and from the centre of the city

the lakes to the top with Sankt Jørgens Sø to the left and the end of Peblinge Sø to the right

the road over the causeway comes down to Jarmers Plads and then past the west side of the city hall at about the centre of the photograph with Tivoli to the left and then HC Andersens Boulevard continues on down to Langebro as a main route to cross from the city to Amager

historic aerial view showing the bridge over the harbour at Langebro that was built in 1903 and the first part of HC Andersens Boulevard with densely-planted trees down the centre rather than bumper to bumper cars now