Gateway WA

This project by Main Roads Western Australia achieved an 'Excellent' Design v1.0 IS Rating.



This, the largest infrastructure project ever undertaken by Main Roads Western Australia, is a billion-dollar project involving a major upgrade to the road network surrounding Perth Airport, and the freight and industrial hubs of Kewdale and Forrestfield.

"Pursuing an IS rating for Gateway WA is an important way that the Alliance Partners can demonstrate their commitment to, and the implementation of, sustainability on projects. We are also using the pursuit of an IS Excellent rating to drive the extensive use of recycled materials as part of promoting sustainable road design, construction and operational practices in Western Australia." 

Nick Combe, Alliance Director, Gateway WA Alliance

Materials lifecycle impact reduction (Ecopoints)    825,793 
Materials lifecycle impact reduction (tCO2e)    21,509


  • Rating Type Road
  • Rating Score 50.6
  • Registered Date January 2012
  • Practical Completion January 2017
  • State WA
  • Suburb Perth
  • Capital Value $1 Billion

Case Study

Click here to read a case study for this project.

Rating Highlights

Management Systems

Generally good management systems in place

Excellent integrated decision making process which considers sustainability aspects.

Publicly stated commitments to sustainability and restorative actions.

Undertook sustainability knowledge sharing initiatives with the wider industry.

Procurement and Purchasing

Pro-1, Pro-2 both Level 2

Suppliers requested to address sustainability, environmental aspects and apprenticeships.


Wat-3 Level 3

Water for construction was entirely sourced from approved groundwater extraction.


Mat-1 Level 3

Full score achieved for this category

Reduced materials lifecycle environmental impact by 58% through:

  • Negotiated airport requirements to allow an altered design that reduced the depth of excavation for some sections of the road.
  • Use of C600 binders which reduced the quantity of asphalt by 10%.

Updated pavements specs and worked with the Public Health Advisory Committee to lift a veto on the use of recycled materials because of concern over asbestos contamination. This allowed significant use of crushed recycled rock and waste quarry materials (sand replacement).

Community Health, Well-being and Safety

Hea-2, Hea-3 Level 2

Consideration of CPTED throughout the design phase, including application on seven pedestrian underpasses which are being construction as part of the project. Principles have been applied to reduce blind corners and provide end-to-end visibility.

Stakeholder Participation

Comprehensive and thorough stakeholder engagement strategy

Stakeholder participation on negotiable issues was undertaken at an ‘involve’ level. The project team worked involved a number of stakeholders, and its consultation groups, in particular the Community Liaison and Freight and Road User Groups (including Kewdale Business Group), on a range of key aspects of project development and design.

Urban and Landscape Design

Full score achieved for this category

An urban and landscape design plan has been developed

Strategies applied to the Australian Urban Design Protocol which includes design principles for people (liveability) and design principles for place (productivity and sustainability).

Plans were independently reviewed by the Western Australian Office of the Government Architect.


Inn-1 Level 2

LED lighting for highway roads is being implemented which is a first for Australia. This saves 1400 tCO2e over the assets lifecycle.