The A47 is to be extended to Lowestoft in Suffolk as part of the government's roads plan which will see £1.5 billion being spent on transport projects in the East of England.
The A12 between Great Yarmouth and Lowestoft will be redesignated as the A47 to reflect the routes nature as a continuous east-west corridor.
£10 million has been set aside for safety improvements on the A47 Acle Straight although there are currently no plans to dual the notorious accident blackspot.
The Conservative MP for Waveney, Peter Aldous, says the focus must now be on dualling the entire length of the A47 to Peterborough.
“Poor roads to Lowestoft and the Waveney area have been a major obstacle to attracting new business for far too long and thus I very much welcome this significant investment in the A47, which will make us more accessible to the rest of the country and which will help bring new jobs to the area, building on the great start which has been made by the Lowestoft and Great Yarmouth Enterprise Zone."
Long-awaited upgrades for the A12 in Essex, the A47 in Norfolk and the A428 in Cambridgeshire have been announced by the government.
The biggest road improvement programme in the East of England for years is set to be announced in this week's Autumn Statement.