A £410,000 road improvements scheme – to include patching, resurfacing and drainage works – will start at Mowhan Road, Glenanne, on Monday.
It will extend approximately three kilometres from south of the Tullyallen Road junction to the Glenanne Road junction.
Roads Minister Nichola Mallon said: “This significant investment will greatly improve the strength and surface quality of this section of the rural road network to the benefit of all who use it.
“I would like to thank local residents and businesses in advance for their cooperation and ask that they comply with all temporary traffic restrictions while these much needed works are completed.”
To facilitate the works, it will be necessary to implement a series of road closures.
An initial road closure for preparatory work and drainage investigation will be in place from 9am until 6pm each day from Monday, October 18 until Thursday, October 28.
A second closure will be required for final resurfacing in the weeks following this and details will be made available and variable messages signs updated on site when dates are confirmed. The road will be open in the evenings and at weekends.
During periods of closure traffic will be diverted via Mowhan Road, Newry Street, Gosford Road, Bessbrook Road, Main Street Mountnorris, Maytown Road, Kingsmill Road and Mowhan Road.
Local access for residents and emergency services will be maintained although some delays may be experienced.
A DofI spokesperson said: “The Department has carefully planned these road works and associated traffic management arrangements in order to minimise inconvenience to the public. Road users are advised to allow extra time for their journey and to follow the alternative routes which will be clearly signed on the approaches to the closure.
“The Department will keep the public informed of any change and of the dates of the future road closure.
“All work will be carried out in line with current public health and health and safety advice, with safe systems of working in place for staff and contractors.”