Skanska has been appointed by National Highways to deliver a long-awaited upgrade to the A47 Thickthorn junction near Norwich, under a contract valued at £153 million.
The junction, which links the A47 with the A11 south of the city, is a critical gateway to the region, serving routes towards Norfolk and the Norfolk and Norwich University Hospital. Long plagued by congestion, the site is now set for major redevelopment to support future residential and commercial growth.
The scheme has faced a series of delays and rising costs. Initially estimated at between £50 million and £100 million, the price tag later surged to £161 million, leading to the termination of the previous contract with Galliford Try—also the contractor for two other A47 upgrades at Blofield to North Burlingham and North Tuddenham to Easton. All three projects were delayed by ultimately unsuccessful legal challenges.
Now back on track, enabling works are under way, with full construction expected to commence in early 2026. The new junction is not expected to open to traffic until 2029. Once complete, it will include a 1.6km free-flow link road connecting the A11 northbound to the A47 eastbound via two new underpasses, alongside a 1km local link road joining Cantley Lane South with the B1172 Norwich Road.
This local route will feature a modular bridge spanning the A11 and the new link road. The project also involves the creation of two new junctions on the local road network, the widening of the A47 westbound slip road, and the removal and replacement of an existing footbridge with a structure suitable for pedestrians, cyclists and horse-riders.
Skanska is partnering with consulting engineer Sweco to deliver the project, which will include five new structures and over 3km of utility diversions. At its peak, the scheme will employ more than 300 people.
Andrew English, executive vice president at Skanska UK, said:
“We have worked collaboratively with National Highways to develop the design and scheme budget to ensure it meets the overall cost envelope for the project. Our focus on cost, while ensuring we can deliver the full benefits of the scheme safely and on programme, has been key to our approach. It’s a great outcome that has been achieved as a result of our trusted working relationship with National Highways, developed over more than two decades.
We’re now looking forward to moving into main construction, delivering these much-needed improvements that will generate long-lasting benefits for the region.”
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