Great Eastern Highway Safety Upgrade

Bilgoman Road to Mann Street

  • Upgrading a 7.2 km section of Great Eastern Highway in two sections; Stage 1 between Kintore Road and Mann Street and Stage 2 between Bilgoman Road and Kintore Road.
  • Stage 1 works were completed in 2017. Stage 2 works set for completion by mid-2019.
  • Improve safety and efficiency; enhance pedestrian and cycling facilities.


Stage 2 work includes:

  • 5.2 km of widening to provide sealed shoulders
  • 4.5 km of new drainage
  • New or extended turning pockets at all intersections 
  • New street lighting to Australian standards
  • New shared paths linking new sealed bus bays
  • New road markings, advance warning signs and guide posts
  • 11 km of safety barriers 

It also includes new crossovers to tie into existing driveways for residential and business properties fronting Great Eastern Highway. Written notification will be provided to residents, before this work is undertaken.


Until mid-May, there will be intermittent, alternating daytime closures of Seaborne Street and Brooking Road at their intersections with Great Eastern Highway. These roads will be reopened at the end of each shift and on Sundays. It is important to note that both intersections will not be closed at the time to ensure access is maintained to the Parkerville area. Signed detours will also be in place along the alternate route.

Other intermittent side road closures, with minor detours, should also be expected as part of this project. These will be advertised on site and affected residents will be notified. 

Intersection changes: Great Eastern Highway-Park and Hardey roads

From May, changes will also come into effect at the intersection of Great Eastern Highway with Park and Hardey roads. Road users will only be able to turn left onto the highway from Park or Hardey and dedicated U-turn facilities will be provided approximately 260 m along the highway.

See modified layout below


To protect road users and workers, the posted speed limit has been reduced to a maximum of 60 km/h on Great Eastern Highway between Bilgoman and Kintore roads. This will remain in place for the duration of the works.

Road users should also expect reductions to 40 km/h to allow for various construction activities, as well as lane closures and occasional side street intersection closures for drainage works, with signed detours in place.

Please expect occasional delays and follow all roadworks signage.

General working hours are Monday to Saturday, 7am to 7pm. Some work, including traffic management set up, may be conducted outside these hours, subject to approval by the Shire of Mundaring. Every effort will be made to minimise disruption to residents living close to the work site. This includes dust suppression and full reinstatement of roads and verges.


We completed a biological survey for the site and refined the Stage 2 design several times to minimise the impact of clearing.

Some of the ways we are preserving vegetation include:

  • maintaining the current level of carriageways to avoid any unnecessary damage to underground root systems
  • installing safety barriers on both sides of the median. While safety standards require 1.2 m deflection zone (clear zone) behind these safety barriers to the nearest tree, in wider sections of the median at least eight to 10 metres of vegetation will be preserved
  • locating street lights within the verge, where practical, to avoid additional clearing in the median. Where this is not possible, double outreach poles are proposed in the median to keep clearing to a minimum.

In accordance with our environmental processes, the clearing extents for this project were also reviewed by the Shire of Mundaring and the Department of Biodiversity, Conservation and Attractions.

All vegetation cleared for this project will continue to be mulched and re-used on-site. A replanting program featuring local species is being delivered for Stage 1 in consultation with the Shire of Mundaring. Further replanting will be undertaken in mid-2019 to complete Stage 2 works.

We will also recycle concrete kerbs, paths and asphalt.


Stage 2 works:

  • September 2018: Construction starts
  • April 2019 to August 2019: Lighting (Western Power)
  • Mid-2019: Revegetation


Image: Stage 1 has been completed and includes sealed bus lanes and safety barriers


  • Improve safety and efficiency
  • Enhance pedestrian and cycling facilities


The project is jointly funded, with $34 million from the Australian and Western Australian Governments and supported by the Shire of Mundaring.

Last Updated: 24 April 2019