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Great Eastern Highway Upgrade

This project by Main Roads Western Australia has achieved a 'Commended' As Built v1 IS Rating.


A 4.2km section of the Great Eastern Highway between Kooyong Road and Tonkin Highway widened from four to six lanes with a number of ancillary improvements including central medians, upgraded intersections, on road cycling facilities, bus priority lanes and continuous paths for pedestrians. The project was jointly funded by the Commonwealth’s Nation Building Program and Government of Western Australia.

“The IS rating process has encouraged Main Roads WA to formally identify major projects where project teams are able to implement best-practice and innovative sustainability solutions to deliver long-term environmental, social and economic benefit through WA road infrastructure.” 

Leo Coci | Executive Director | Infrastructure Delivery Directorate | Main Roads Western Australia

“The entire Project Team was enlisted to support the achievement of this rating, from generating ideas relating to protecting the environment and sustainability during the design phase, through to making a difference in minimising the use of water and correct disposal of waste during construction.” 

Stephen Nicolay | City East Alliance Director | Project Manager | Leighton Contractors


Rating Highlights

Management Systems

Score: 6.3/10.5

  • Commitment to mitigating negative environmental, social and economic impacts
  • Accredited management systems
  • Thorough risk and opportunity assessment
  • Knowledge sharing clearly demonstrated
  • Strong decision making approach incorporating sustainability aspects


Score: 2.9/7.0

  • Opportunities to reduce water use identified and implemented
  • Instead of using high-value potable water, the project installed groundwater bores and constructed a weir which, on completion, was handed to the local council to irrigate parks


Score: 6.2/7.0

  • Significant reduction in materials lifecycle impacts through extensive use of recycled materials, reducing the use of non-renewable resources of limestone, sand and bitumen
  • The highway now has the largest use of recycled material on any WA State road with 43 per cent of imported material being recycled


Score: 3.3/3.3

  • >75% of land used for the project was previously disturbed


Score: 2.3/5.0

  • Thorough approach to heritage assessment and management
  • Monitoring overseen by appropriately qualified persons


Score: 1.7/5.0

  • Warm mix asphalt was used on the project, applying innovative foaming technology to mix the bitumen into the asphalt mix
  • This was a first for Western Australia, reducing energy use and GHG emissions


To find out more about this project, visit the Main Roads WA website.