Part of the Orwell Bridge and A14 will once again be closed this week while inspections are carried out.
The eastbound carriageway will be closed between junctions 55 and 58 from Monday to Friday.
The carriageway will be closed from 8pm to 6am every day.
It comes after the westbound carriageway was closed for five nights while National Highways carried out surveys on the Orwell Bridge.
Simon Oakhill, senior engineer at National Highways in the East Region, said: "We don't want to inconvenience anyone so any road closure is only taken as a matter of last resort.
"Unfortunately, when the survey work on the bridge was carried out in September we lost a number of shifts to bad weather, which is why we need to carry out these remaining elements.
"We are trying to minimise any inconvenience by carrying out this work at night when the road is at its quietest."
Diversions will be in place.
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