The NSW government is considering adding a third downhill lane to the M1 Princes Motorway - ending at the base of Mount Ousley.
Kiama MP Gareth Ward said the government was investigating adding a 2.5-kilometre third lane on the southbound side starting about 650 metres north of the New Mount Pleasant Road intersection and finishing at the base of the hill.
Mr Ward said the government had provided $500,000 this financial year to investigate a possible interchange and third southbound lane.
The proposed interchange would replace the intersection of the M1 Princes Motorway and Mount Ousley Road, improving access and travel times to and from the Princes Motorway and the Wollongong CBD, he said.
"Access improvements to the University of Wollongong will also be prioritised as part of the work.
"The potential upgrade also aims to cater for future traffic growth, including in freight and higher mass vehicles," he said.
The investigations were due to start soon and would include an environmental assessment, surveys and traffic modelling.