After years of campaigning and months of preparation, work will start this month to dual the last remaining single carriageway section of the A11.
Contractors Birse Civils Ltd have been readying the site to widen 5.5 miles of the notorious route from the Fiveways roundabout to Thetford and build a new 3.6 mile bypass around Elveden.
Work on the £94 to £113 million project will officially start later this month to be completed by December 2014.
Bosses at the Highways Agency say the development will bring a ‘significant boost’ to the economy, reduce congestion and improve road safety.
A spokeswoman said: “Before the main work gets underway, the contractor will work with the Agency’s A11 project team to finalise the details for the traffic management needed.
“This will include the temporary safety barrier which will be installed along the A11 to provide protection for the workforce and road users as well as mobilisation of plant machinery and materials on site.”
The first phase of construction will start with top soil stripping from the Fiveways roundabout onwards.
In advance of the works, trees and vegetation have been cleared along the route.
Post and wire fencing has been installed to mark the project boundary.
Access tracks at the Elveden estate have also been built or resurfaced.
The spokeswoman added: “We will keep everyone updated aheaed of work starting and during construction work to ensure they have the latest information and can plan their journeys.”