Motorists are advised of changed traffic conditions on The Entrance Rd to carry out investigation work between Nepean St and Cresthaven Av at Bateau Bay.
One southbound lane will be closed for road investigation work, to help with planning for future road maintenance.
To minimise impact to motorists, work will be carried out from 7.30pm Wednesday, September 18, to 5am on Thursday, September 19, and is expected to take one night to complete, weather permitting.
Traffic control and a reduced speed limit of 40km/h will be place for the safety of workers and motorists.
Some short stops may be required.