A link road between Bexhill and Hastings in Sussex is to finally go ahead after the chancellor announced in the Budget that the government will provide £56 million of support.
The 5km-long stretch of road was first granted planning back in 2009, but has still not been started despite £37 million of backing from East Sussex County Council.
East Sussex council leader Peter Jones described it as a "once in a generation" opportunity and said the government's funding was a show of "overwhelming" support.
"Unlike other schemes, the link road is well advanced. It has planning permission, has been through a public inquiry process and there is a contractor ready to start work," he said.
It is understood that a Hochtief/Vinci joint venture is in place to start construction.
The government also announced that it is looking at ways to increase capacity and improve performance on the A14 between Huntingdon and Cambridge, which may be part-funded using tolls.