The Princes Highway upgrade is a series of projects to improve the coastal route between Sydney and the Victorian border. It is expected more than $15 billion will be invested over the next 20 years to duplicate the entire Princes Highway between Nowra and the Victorian Border.

Projects already announced in the program include: 

• Albion Park Rail Bypass - The $630 million project will extend the M1 Princes Motorway between Yallah and Oak Flats to bypass Albion Park Rail
• Berry to Bomaderry upgrade - The $450 million Berry to Bomaderry upgrade will provide around 10.5 kilometres of four lanes of new divided highway, two lanes in each direction, between Mullers Lane at Berry, and the Cambewarra Road roundabout in Bomaderry, and
• Nowra Bridge Project - The $310 million Nowra Bridge upgrade will provide a new four-lane bridge over the Shoalhaven River at Nowra. All four lanes would be northbound traffic, with the current southbound bridge (built in 1881) converted into pedestrian and cycleway and the current three-lane northbound bridge converted into only southbound traffic.

Projects announced but not yet under construction include:

• duplicating sections of the Princes Highway from Jervis Bay Road to Sussex Inlet Road
• building the Moruya Bypass, and
• starting detailed planning work for the Milton and Ulladulla Bypass and upgrades for the Princes Highway from Burrill Lake to Batemans Bay.