A temporary road closure for vehicles will be in place in Castle Street from 27 December for the installation of a new footbridge.
Work on the bridge will start on 6 January and is expected to take 6 weeks. Traffic lights will indicate when the road closure applies.
The new footbridge links Church Street to Castle Street. It is a popular route between Nunney Castle and the church.
The old bridge was removed two years ago after falling into disrepair.