Princes Highway upgrade

Princes Highway upgrade, between Kinghorne Street and Forest Road, South Nowra

Latest news - April 2014

The $62 million Princes Highway upgrade at South Nowra was officially opened by the Minister for Roads and Ports and Member for South Coast on Saturday 29 March 2014.

The 6.3 kilometre Princes Highway upgrade between Kinghorne Street and Forest Road will improve traffic flow for both local and ‘through’ travelling motorists on this busy section of the Princes Highway.

The completion of this highway upgrade is another step towards Roads and Maritime achieving its commitment to provide two lanes in each direction from Waterfall to Jervis Bay Road.

Four lanes were open to traffic prior to Christmas 2013 to allow for free flowing traffic conditions for the busy holiday period. Since the New Year, finalisation work such as installation of line marking, sign posting and guardrail has been carried out and is now complete.

In addition to the highway upgrade work, Roads and Maritime is building a new road shoulder on the highway between Parma and Forest roads (in the northbound direction). This work is being done as a result of community concerns. It is planned for this work to be finished in July 2014, weather permitting.

Project benefits and key features


  • Consistent four lane travel conditions on the Princes Highway between Bomaderry and Jervis Bay Road.
  • Improved road safety by reducing conflicts between through traffic and local traffic accessing business premises.
  • Improved road safety by providing a central median, along with more opportunities to safely overtake slower vehicles.
  • Improved travel times for motorists.
  • Improved access to many business properties.
  • Improved safety and facilities for pedestrians and cyclists.

Key features:

  • Enhanced travel efficiency for through traffic with the provision of three lanes on the eastern side of the highway between Quinns Lane and Warra Warra Road.
  • A 2.5 metre wide shared footpath / cycleway on the eastern side of the highway between McKay Street and Warra Warra Road for cyclists and pedestrians.
  • An on road cycle facility south of Warra Warra Road.
  • Pedestrian activated traffic lights on the Princes Highway at the Park Road cul-de-sac.
  • Changes to Nowra Hill Road to a left in, left out intersection.
  • Relocation of the existing BTU Road intersection to approximately 400 metres north of its original location. The new intersection has been reconstructed to allow all turning movements.
  • Reconstruction of the Forest Road intersection to allow all turning movements.
  • A dual lane roundabout at the junction with Hillcrest Avenue.
  • A heavy vehicle inspection area to the south of Hillcrest Avenue.
  • Improvements to the existing service road between Quinns Lane and Central Avenue to a two lane road on the western side of the highway for improved road safety and accessibility.
  • Construction is currently underway to build a new road shoulder, in the northbound direction, between Forest Road and Parma Road.

Green and Golden Bell Frog

Major construction on the upgrade started in November 2011 but stopped when several endangered Green and Golden Bell Frogs were found on and adjacent to the project site.

Work was delayed by 88 working days while plans were put in place to protect the frogs under the requirements of state and commonwealth legislation.

As part of the Australian Government's approval for construction work to recommence in March 2012, a Green and Golden Bell Frog management plan was put in place. This plan includes installation of temporary frog fencing during the construction period, construction of frog ponds and culverts and a three year population study of the frogs within the Nowra floodplain area.

Construction of eight new habitat ponds is complete and five new frog friendly culverts have been built. Over four kilometres of temporary frog fencing was also installed to prevent injury to the Green and Golden Bell Frogs during construction. This fence has since been pulled down.

Roads and Maritime engaged the Australian Research Centre for Urban Ecology to undertake a three year population study. This study commenced in November 2013 with field investigations of sites around Nowra being undertaken.

This study will continue for three years with individual surveys undertaken three times per active season (November to April).

For more information, please contact Roads and Maritime Services Project Manager on 131782, or PO Box 477 Wollongong NSW 2520.