Drivers are set for relief at a major pinch point after a £4.5 million cash boost from the Government.
Work at the Abthorpe roundabout on the A43 in Towcester will begin next year and will free up road capacity to support the development at Silverstone.
The funding supports £3.1 million which had already been secured by South Northants Council (SNC) for improvements at the Tove junction on the A43 and A5.
A long-awaited Towcester relief road has also taken steps forward with discussions soon beginning with developers.
Mary Clarke, leader of SNC and board director of South East Midlands Local Enterprise Partnership, said: “This is really great news.
“This latest funding has resulted in SNC being instrumental in securing £7.6 million of government funding towards infrastructure in South Northants.
“It shows that this government recognises the importance of the A43 and its excellent local and strategic links to Towcester, Brackley and Silverstone as well as the M40 and the M1.
“Progress on the construction of the relief road is also extremely welcome news, the first published commitment by the Department of Transport coming after more than 20 years of public desire, evidence gathering and lobbying - a great result for this council.”
Both the Tove and Abthorpe roundabouts have been identified as key junctions required to unlock growth in Towcester and enabling improvements along the A43 corridor to improve access to Silverstone, Brackley and Northampton.