The roadworks will be in place from Monday 05 February and is expected to take four weeks.
The works are from the junction with the N17 on the Corrandulla Road for a distance of 100m.
The contracts for the project has been awarded to Harrington Concrete & Quarries Ltd.
Galway County Council say traffic delays are expected and that diversion routes will be signposted.
The works will involve the removal of the existing stone wall, the construction of a footpath and replacement boundary wall, access and accommodation works, drainage and ancillary road works, and traffic management.