Bridge End Road and Gipsy Lane will be closed between Swindon Road and Cirencester Way with a diversion in place along Drakes Way and then down County Road to the Great Western Way.
The roads are closed whilst Wales & West Utilities upgrade the gas pipe in the area.
Mick Gallavin from Wales &West is managing the work. He said: “While most of the gas network is underground and out of sight, it plays a central role in the daily lives of people across the Swindon area.
“We know that working in areas like this is not ideal, but it is essential. We’ll have a team of gas engineers on site to make sure our work is completed as safely and as quickly as possible while keeping disruption to a minimum.
“This work will not only keep the gas flowing safely and reliably today, it will also help make sure the gas network is fit for the future.”
