Work will take place between 8pm and 6am to repair the lifting mechanism. The bridge will be closed during this time.
Traffic will be directed to follow a signed diversion via the Vauxhall roundabout, Acle New Road, Fullers Hill, Alexandra Road, Yarmouth Road, Hall Quay, Bridge Road, Haven Bridge, A1243 Pasteur Road to re-join the A12 at Gapton Hall roundabout.
Motorists affected by this work are advised to plan ahead and allow extra time for travel.
Members of the public should contact the Highways Agency Information Line on 0300 123 5000.
Journalists should contact the Highways Agency press office on 0844 693 1448 and use the menu to speak to the most appropriate press officer.