Repair work on Torridge Bridge in Bideford will resume later this month.
The second phase of the scheme to replace a damaged expansion joint on the bridge will get underway on Monday, September 17.
Work will be carried out at night-time using temporary two-way traffic lights from 7pm to 6am.
Both lanes of the bridge will be open during the daytime and a precautionary 20mph speed restriction will remain in place at all times.
Some work may need to be carried out at weekends and an overnight closure will be needed in October.
The scheme is expected to take around three months to complete.
Routine inspection and testing works on the bridge will take place at the same time, in order to maximise use of the night-time lane closures.
Councillor Stuart Hughes, Devon County Council cabinet member for highway management, said: “Public safety is always our priority and it’s important that this bridge maintenance work is carried out.
“Every effort is being made to minimise disruption just as we did with the first phase of the scheme earlier in the year.”
Councillor Linda Hellyer, DCC for Bideford East, added: “It is vital that our bridges are maintained safely.
“In this instance, the expansion joint at the eastern end of the bridge needs replacing as soon as possible.
“The night working system will keep disruption to the minimum and I hope that folk will be understanding about any possible delays.”