Investigations into the quality of road surfaces in several locations in Wollongong will start on Sunday.
Core samples of the road surface and sub-layers will be taken to assess the remaining life of the roads and any resurfacing options.
Tomorrow, Roads and Maritime Services will take samples on Bourke Street, between Kembla and Flinders streets, North Wollongong, and on Monday, on Crown Street, between Mangerton Road and Thames Street, West Wollongong.
Work will take place from 8pm to 2am and traffic controls will be in place.
The same investigation work is scheduled for March 11 on Flinders Street between Station Street and Ajax Avenue.