A major revamp of the gas mains in Thetford town centre is underway.
National Grid began work to renew the gas pipes on March 16. The project started in Guildhall Street and is due to take around eight weeks.
Engineers will be replacing iron gas pipes in Rampart Way, Raymond Street, Well Street, Castle Street, and Old Market Place with plastic pipes.
Temporary traffic lights will be in place at the junctions of Guildhall Street, Rampart Way, Raymond Street, Old Market Street and Castle Street for the next two weeks.
A three-way traffic light system will then be introduced for one week at the junction of Guildhall Street.
Cage Lane will be closed from March 30 for two weeks. Well Street is also to be closed during mid-April for a week. A diversion will be in place.
Some service pipes connecting individual homes and business to the gas main will also be replaced. National Grid will contact those occupiers likely to be affected.