Night-time road work will be carried out over the next two months on the eastern side of Woronora River at Woronora.
Traffic may be affected by lane closures during the work between Menai Road, Woronora, and Galga Street, Sutherland.
Roads and Maritime Services said the “essential maintenance” would require about 20 shifts until Sunday July 2 between 9pm and 5am, Sunday to Friday, excluding public holidays.
The work had been rescheduled due to recent wet weather, a spokeswoman said.
It involved utility investigations, repainting road markings and removing and replacing sections of asphalt, kerb and gutter.