Motorists are advised of changed traffic conditions on the Princes Highway south of Nowra from Monday to complete essential drainage work.
One northbound lane will be closed during work hours from Monday May, 26 to Friday, May 30.
Work will be carried out between 9.30am and 6pm each day and a reduced speed limit of 40km/h will be in place through the work area.
The slow lane will be closed for around 150 metres from just north of the quarry to Ballina Street.
Motorists are asked to slow down and follow all signs and the direction of traffic controllers.