Interdisciplinary collaboration - lower carbon footprint, early project delivery

Highway 4, between the municipalities of Roa and Gran, there were several challenges that needed to be solved. For instance, how to build a four-lane highway through a swamp without destroying it? In addition, there turned out to be a lot of quick clay in the ground, a special kind of clay that is prone to collapse and become liquid under pressure. Furthermore, a limited carbon footprint was an important project requirement.

Read through this case study to get further insights. 

Project facts:

• New four-lane motorway that will increase capacity and reduce the risk of accidents on the Roa-Gran stretch.

• The client is the Norwegian Public Roads Administration. Turnkey contracted with the combination of Hæhre-Isachsen as contractor and COWI as designer.

• The budget is just over NOK 700 million.

• Construction start: September 2021, opening November 2023.