Highways bosses will unveil plans to widen the Breydon Bridge and put in new traffic lights on a new larger Vauxhall Roundabout in Great Yarmouth tomorrow.
The work will be part of a £300m A47 upgrade to six stretches of the A47 which will be unveiled at a launch event in Peterborough.
Norfolk councillors and MPs were briefed about the plans for the Norfolk stretch of the route in Norwich today.
Engineers have also drawn up plans to build a slip road at the Thickthorn Roundabout for northbound A11 drivers heading towards Great Yarmouth and to take drivers joining the A11 southbound from the Great Yarmouth direction on a slip road away from the Thickthorn Roundabout.
New stretches of road could also be built to create a dual carriage way between Blofield and North Burlingham, Easton and North Tuddenham and Wansford and Sutton in Cambridgeshire.
Highways England, which is now running a consultation on the plans for six weeks until April 21, has sent letters to people living in homes which might be affected by the work.
Phil Davie, the senior responsible officer for the A47, said they had done a lot of work looking at the options for the route and feedback would be incredibly valuable.
He said that consultation responses would shape the options they decided to take forward for the upgrade.
Work is not expected to start on the road until March 2020.
A website with the detailed maps is also due to go live tomorrow on the Highways England website with details of the consultation events.
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