Reid Highway/Mirrabooka Avenue Overpass


Abigroup has finished building a new overpass on Reid Highway, at Mirrabooka Avenue, on behalf of Main Roads WA.


Current status

On Sunday 13 November, the Honourable Minister for Transport, Troy Buswell officially opened the new Reid Highway bridges over Mirrabooka Avenue, one month ahead of schedule.

Abigroup also finished laying a new asphalt surface for the on and off-ramps at the interchange. Several noise and screening walls have also been installed. These include:

  • A new solid wall in Westminster, from Mirrabooka Avenue to the Majella Road footbridge.
  • Modifications to residential boundaries (along Reid Highway) in Dianella and Mirrabooka.

These works are designed to maintain noise levels within the Australian Standard and improve the visual amenity of the surrounding area. 

Landscaping was completed in winter 2012.

A Project Newsletter November 2011 providing the current status update is available for download.  



The intersection of Reid Highway and Mirrabooka Avenue is one of West Australia's most notorious black spots in the metropolitan area.

Between 1999 and 2009 there were 400 crashes at the intersection, resulting in four fatalities and 38 people seriously injured. In terms of crash numbers, the intersection is currently ranked second in the City of Stirling (behind the Reid Highway-Alexander Drive intersection) and fourth in the metropolitan area for both serious and fatal crashes.

With more than 60,000 vehicles using this intersection every day (expected to rise to 85,000 by 2015), its poor safety record is largely due to the high speed environment on Reid Highway, the downhill approaches to the intersection and the high traffic volumes.

Constructing an overpass at the intersection will:

  • Improve traffic flow in all directions by enabling uninterrupted traffic flow along Reid Highway and reducing delays at the Mirrabooka Avenue traffic signals 
  • Realise significant environmental benefits such as lower carbon emissions from reduced traffic delays
  • Improve noise and visual amenity
  • Include public art on the bridge retaining walls and landscaping
  • Enhance on-road cycling facilities on Reid Highway and Mirrabooka Avenue
  • Cater for a future expansion of Reid Highway to six lanes



The new interchange has been constructed in a traditional 'diamond' layout, and includes two separate bridges on Reid Highway, between the two existing sets of traffic signals on Mirrabooka Avenue.  These bridge structures are the same as those built over Alexander Drive.

The new interchange has been built on the current alignment and required no additional land. Two lanes have been provided in each direction on Reid Highway, however the bridges have been constructed to eventually carry a total six lanes of traffic.

Wide and sealed shoulders along Reid Highway have been retained for safe, on-road cycling and vehicle breakdown while noise walls and visual intrusion barriers, including landscaping, will be used to maintain the amenity of the area.


Background material


Modified: 14 Jul 2017