Sustainability Overview

We have had a formal Sustainability Policy in place since 2006 which has guided our approach to sustainability. In 2015, a renewed focus on sustainability was introduced with the release of our current strategic direction, Keeping WA Moving and as a result, a refreshed Sustainability Policy was approved in 2015-16.

Sustainability, within our context is defined as a commitment to 'creating lasting benefits through an integrated consideration of social, environmental and economic aspects in all that we do’.
To facilitate this commitment, sustainability has been included in NorthLink WA's project objectives.

We have promoted sustainability practices throughout the project development phase of NorthLink WA and through procurement of delivery contracts in the following ways:

  • Early registration for a rating with the Infrastructure Sustainability Council of Australia (IS Rating).
  • Delivery contractors are required to manage the IS Rating process and to achieve a minimum of an 'Excellent' rating for each section of NorthLink WA.
  • Delivery contractors are required to develop sustainability initiatives that address project-specific issues such as materials use, waste, community connectivity and water quality.

A number of challenges were identified by Main Roads as being critical in delivering the project. The team used these 'focus areas', which often overlapped several aspects, to identify opportunities for an improved design. NorthLink WA will use the IS Rating (and progress towards achieving this rating) as a benchmark for performance across current and future projects.

NorthLink WA General Initiatives

  • Four metre-wide Principal Shared Path (PSP) which will significantly add to the Perth bicycle network, increasing access to Ellenbrook, Malaga and recreational areas along the alignment. The uptake of electric bikes will also make cycling a more viable transport mode for longer distances. Wider paths cater for increased volumes of pedestrians, people on bikes and more variability in speeds. A shared path will be provided in urban areas on the opposite side of the highway to the PSP.

Alternative pavement binder that enables thinner pavements to achieve the required performance levels. Using this binder decreases the volume of pavement material required and reduces cost.

Southern Section

Delivery contractor for NorthLink WA southern section, John Holland, is committed to using sustainability as a catalyst to promote innovation across all areas of economic, environmental and social responsibility.

Lifecycle assessment tools were used to assess the environmental aspects and potential impacts of the project over its 100-year design life, enabling the potential impacts to be evaluated and interpreted to better inform decision-makers.

Some of the initiatives include: 

  • adaptive and dimming lighting, 
  • asphalt treatments that improve and extend the life of pavement as well as optimising recycled product; 
  • design initiatives including a three-pin arch pedestrian underpass; 
  • awareness raising including a supplier sustainability day; 
  • a four metre-wide shared path; 
  • a grade separated roundabout at Morley Drive that offers many safety benefits for motorists with a reduction of conflict points, and encourages a free-flowing interchange reducing congestion and associated emissions; and
  • a trial of a solar powered permanent variable message signs (VMS) using wireless communication technology.

A testament to the southern section team’s commitment was a recent achievement from the Infrastructure Sustainability Council of Australia (ISCA) with a score of 93 – the highest WA score ever and the second highest ISCA score ever for transport infrastructure projects in Australia. Read more about this achievement on our news story.

Central Section

Delivery contractor for NorthLink WA central section, Great Northern Connect, a joint venture between BGC Contracting and Laing O’Rourke, is committed to the delivery of this section in a way which seeks to enhance economic and social development, while minimising negative impacts on the natural, built and social environment between Reid Highway and Ellenbrook.

Some of the initiatives include: 

  • minimising carbon emissions, pollution and waste
  • optimising resource usage
  • protecting or enhancing the natural environment
  • water management
  • whole of project life best value
  • sustainable procurement and supplier engagement.

The Central Section has developed a Sustainability Statement and the 2017 Annual Sustainability Report will soon be available for review.

Northern Section

Delivery contractor for NorthLink WA northern section, CPB Contractors, is committed to ‘respect for the community and environment’ and is working to consistently identify and implement opportunities for improved efficiency and environmental performance.

Some of the initiatives include: 

  • independent review of sustainability performance undertaken by Main Roads Sustainability Peer Reviewer
  • sustainable procurement
  • sharing sustainability performance and knowledge (including mistakes)
  • use of recycled materials
  • investigate indigenous partnerships to enhance heritage values in any of the following areas such as landscaping, art, conservation/environmental management or education.


Last Updated: 10 October 2017