The final deal for the construction of a controversial road scheme in Dorset is to be signed this week.
Dorset County Council is to sign the contract with Skanska Construction on Wednesday for the construction and design of the Weymouth relief road.
Work on the £84.5m scheme, drawn up to relieve congestion on the A354 and the A353, is due to start early next year.
Plans for the road have been criticised by green campaigners who fear it will damage rare wildlife habitats.
Last month, the government decided not to call a public inquiry into the scheme, despite the criticisms by countryside campaigners.
The deal will now be formally confirmed by the council and Skanska at the county hall in Dorchester on Wednesday.
Geoffrey Brierley, the council's cabinet member for transport, said: "We are looking forward to Skanska supporting our own engineers through the remaining statutory procedures.
"When these are completed, they will be given the green light to complete the design work necessary for construction works to commence."
David Blackburn, operations director for Skanska, said: "Throughout the tender period we developed a considerable understanding of the technical and environmental challenges that will face us.
"We are confident in our abilities to deal with them and construct a road that will be a real asset to the local community and beyond."