The A11 will be closed from the Fiveways roundabout to the B1106 Elveden Crossroads on Saturday night.
The closure will be in place overnight from 10pm to 8am to allow the installation of bridge beams over the A11 for Gibson's bridge.
March 23 will be used as a contingency if required and the A11 will be closed overnight between 10pm to 6am.
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