Overnight closures are due to be in force on the A47 from tonight until Tuesday.
The roadworks will be in place from 8pm to 6am between the Thickthorn Interchange and Trowse eastbound.
Norfolk County Council has said diversions will be in place via the A11 and the A146 to Trowse Newton, to re-join onto the A47.
Highways England committed £300m to improve the A47 with work beginning in 2020.
AA Roadwatch currently states there are delays of nine minutes on the Norwich Southern Bypass eastbound with average speeds of 20mph.
There is also slow moving traffic both ways from the Thickthorn Roundabout to A146 Loddon Road due to the roadworks with a contraflow system in place.
Emergency services and local businesses have spoken about how the roadworks have disrupted them. Click here to read the full story.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here