Additional lane closures will be put in place from next Monday (14 November) as part of the £5 million project to improve junction 20 of the A47 Soke Parkway.
Roadworks at the junction, which started in summer, have caused long delays to villagers trying to get into Peterborough and have also increased congestion on the link to the Frank Perkins Parkway through Eye.
The work will increase the number of lanes from two to three in both directions, with traffic lights controlling the roundabout.
Now the eastbound A47 will be reduced to a single lane from just past junction 18 (Rhubarb Bridge A15) to just past the roundabout.
The restrictions will be in place until Christmas.
The junction 19 slip road from Paston/Dogsthorpe on the eastbound carriageway will be closed for the same period.
Councillor Peter Hiller, the city council’s cabinet member for growth, planning, housing and economic development, said: “We appreciate that the improvement work at junction 20 has caused some inconvenience and apologise for any further disruption that these additional closures will cause. However, this will allow us to continue the work safely and to schedule.
“Peterborough is going to experience significant growth over the next 10 years, with numerous developments planned – including the Norwood development and Paston Reserve.
“The junction 20 improvement scheme will provide additional capacity for the extra growth identified.”
The works will also include the installation of LED street lighting and carriageway resurfacing with a reduced noise surface material.
The project is expected to be completed in spring 2017.