A section of the A11 has been closed off this weekend while work continues to dual the main trunk road between Thetford and Barton Mills.
The Highways Agency says the closures are essential to completely restructure the Fiveways roundabout.
The work is part of the crucial dualling of the A11 between Barton Mills and Thetford.
The A11 northbound approach to the roundabout is shut with diversions via the Red Lodge junction on the A11. Southbound is unaffected.
More top news
More than 2,000 seal pups have been born at Norfolk's Blakeney Point as the site retains its crown as England's biggest grey seal colony.
Milton Keynes has been mocked for its concrete cows and many roundabouts - but it's home to some iconic local - and national - landmarks.
It has been a chilly night in the Anglia region with temperatures plunging below -6°C at Writtle in Essex.