Consultant WSP is to design a new subway route in Stockholm.
The firm was appointed for the line from Odenplan in the heart of the Swedish city to Arenastaden, its new commercial and entertainment district.
The scheme forms part of a major metro expansion programme in Stockholm, which is scheduled for completion by 2022.
WSP Sweden managing director Magnus Meyer said: “This is going to be a challenging project both from a technical and planning perspective.
“It will necessitate good co-operation with all the parties involved, including the Stockholm County Council, the City of Stockholm and the municipality of Solna.”
He added: “We have high aspirations to participate in more railway and subway systems expansions.”