Work has started on a four-month project to replace gas pipes in March.
Engineers with the National Grid have begun work on replacing four miles of iron pipe work with long-lasting plastic, which is expected to last for at least 80 years.
The work, which is expected to finish in April, will take place in mainly residential areas on the east side of the town, from Asplin Avenue to Cavalry Drive.
National Grid authorising engineer Dilbir Chana said his team will minimise disruption.
He said: “This vital project will ensure that local people continue to enjoy a safe and reliable gas supply for decades to come. We are sorry for any inconvenience caused but we would urge people to bear with us while we complete this essential work.
“We will make every effort to minimise any disruption and complete the work as soon as possible.”
Work is currently under way in Asplin Avenue but it will be suspended over Christmas, with all excavations filled in and barriers removed. Work will resume on January 4.
Last week engineers replaced gas service pipes which connected individual homes to the gas main in the road.
Electric fan heaters and hotplates are provided for elderly and vulnerable householders while they are without gas.
When Asplin Avenue is completed National Grid will then begin work in Robshaw Close, Morton Avenue and Collingwood Avenue. Traffic management measures, such as temporary traffic lights or road closures, are not currently necessary.
However, motorists are warned that there may be short delays to journeys while lorries deliver essential equipment and collect spoil from the excavations.
The work has been welcomed by leader of March Town Council Kit Owen.
He said: “This is something that has to be done.
“It has happened in the past. On various times it can be a hindrance but these things have to be done.”