The southbound A11 on approach to Fiveways Roundabout at Mildenhall and one lane of its northbound approach will be closed overnight for up to three nights this week to allow for safety improvements to be carried out.
The work, which will take place from Wednesday March 9 to Saturday March 12, will improve safety and traffic flows by changing the road markings and signs on the roundabout and its approaches to more clearly direct traffic into the correct lanes.
During the work, the southbound approach to Fiveways Roundabout will be closed between 10pm and 6am and traffic will be diverted via the B1107 and A1065.
There will also be overnight lane closures on the northbound A11 approach to Fiveways Roundabout, as well as on the roundabout itself. And the southbound lay-by at the Elveden War Memorial will also be closed from 8 to 12 March.
Drivers are advised to plan ahead and leave extra time for their journeys.