Dallas-based Jacobs announced that it will provide mechanical and electrical design and construction management services for Denmark’s $640-million Marselis Tunnel project, a core component of the country’s ambitious decade-long infrastructure development plan. The firm will partner with Denmark-based Ramboll, which is named as consultant to the Danish Road Directorate to deliver the project.

The tunnel is among at least eight underground projects reported in the plan, also known as Denmark Forward, which has been noted as the largest federal infrastructure investment in the history of any Scandinavian country—estimated to cost $24 billion.  

Expected to break ground in 2028 in the port of Aarhus, the approximate 1-mile tunnel will divert cargo trucks from Marselis Boulevard to a major highway, improving traffic flow between the port and the E45 Motorway.

“It is a complex task to build a tunnel on one of the busiest access roads to Aarhus,” said Michael Schmidt Vosgerau, Danish Road Directorate senior project manager. “We will need international experience, because there are no similar projects like this that have been delivered before in Denmark.”

By moving heavy traffic underground, the tunnel will enable more green spaces and less crowded streets above and “a more vibrant city for residents and visitors,” he added.

The tunnel is an “investment in Denmark’s transport infrastructure,” said Richard Sanderson, Jacobs senior vice president.

Jacobs ranks No. 5 on the 2025 ENR Top 150 Global Design Firm list with $9.41 billion reported in global revenue last year. Ramboll ranks at No. 20 on the list, reporting about $2.66 billion of global revenue.