One lane of the A11 is closed in both directions between Thetford and Larling following a lorry crashing into the central reservation.
Police were called at 10.05am this morning to the incident close to Larling.
No injuries were reported but the lorry has caused extensive damage to the central reservation.
The lorry has been recovered but workers from Highways England are on scene carrying out repair works.
Drivers are asked to approach the area with caution.
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