Gympie Arterial Road and Strathpine Road (Bald Hills), improve intersection

Construction has started to address safety and congestion concerns at the Gympie Arterial Road and Strathpine Road interchange at Bald Hills.

The project design will transform this interchange into a diverging diamond interchange, an innovative intersection design that will reduce congestion, improve travel times and address safety concerns.

The new interchange, while unfamiliar to Australian drivers, will be easy to navigate and we will engage with road users to help drivers understand how to navigate the intersection.

The local community will be kept informed as the project progresses.


  • Improves safety
  • Increases capacity
  • Reduces travel time
  • Reduces peak hour congestion
  • Contributes to economy

Key features

  • The new innovative interchange system allows free flowing turns when exiting and entering Gympie Arterial Road.
  • The interchange eliminates the number of conflicts with opposing traffic on Strathpine Road and reducing traffic signal phases, making the interchange safer and more efficient.
  • A diverging diamond interchange is cost-effective to construct and has lesser impacts on local residents compared to a traditional interchange because it requires a smaller footprint.
  • The Strathpine Road and Gympie Arterial Road diverging diamond interchange will be the second in Queensland, with the Caloundra Road and Bruce Highway (QLD) diverging diamond interchange being the first.


The Australian Government, under the Urban Congestion Fund, has committed to jointly fund (50:50) $30 million for the Gympie Arterial Road and Strathpine Road interchange upgrade with the Queensland Government. Investment ID 703296

Total investment
$30 million
Australian Government
$15 million
Queensland Government
$15 million

Current status

Construction is now underway.

Artist's impression of the Strathpine Road and Gympie Arterial Interchange
Gympie Arterial Road and Strathpine Road Interchange upgrade map