We Like Big Bridges and We Cannot Lie

Yeah baby, when it comes to bridges, Cosmo ain’t got nothing to do with our selection.

They duplicated the gateway. They duplicated Hornibrook. And now Bribie is getting the ugh, double-up, ugh-ugh.

The iconic two-lane bridge connecting Bribie Island to the mainland has served the region since 1963. While still long and strong and down to get the traffic on, the existing structure is no longer keeping pace with growing volumes, safety demands, and the increasing importance of reliable access to the island.

With more than 800,000 visitors crossing the bridge each year, even white boys got to shout: “baby got bottlenecks!”

The project has now progressed through business case development and into detailed design, with four local civil contractors currently pricing the works.

Baby Got Back(ground)

The City of Moreton Bay attracts more than four million visitors annually, with Bribie Island accounting for approximately 18% of that tourism activity. As one of the region’s key destinations to stay and play, maintaining safe and reliable access is critical to supporting local businesses, tourism, and the growing community.

Bribie Island’s population is forecast to increase from around 21,700 residents to 24,000 by 2046. While growth is expected to remain relatively modest due to development constraints on the island, transport demand is continuing to rise.

Investigations into the existing bridge identified several operational and safety issues, including limited incident management capability, constrained lane widths, and the close proximity of nearby intersections. Currently, even minor incidents can result in significant traffic delays or full bridge closures. On a busy day, if travellers wanna roll in a Mercedes over the bridge, they’ve either gotta turn around or stick it out on the single lane.

Double-Up

The project forms part of the Queensland Government’s broader plan to upgrade Caboolture–Bribie Island Road to a four-lane corridor.

Rather than toss it and leave it, the government has decided to pull up quick and retrieve the old bridge, with a new two-lane eastbound bridge to be constructed alongside the existing structure, incorporating dedicated active transport infrastructure for pedestrians, cyclists, and mobility device users. The existing bridge will then be converted to carry two westbound lanes.

The design also allows traffic to be redirected between bridges during incidents or maintenance works, significantly improving network resilience and reducing the risk of complete closures.

Key Features

• New 2-lane, eastbound traffic bridge with road shoulders and separated active transport path.

• Existing bridge to provide 2 westbound traffic lanes.

• Crossing points on the roads that approach the bridges to transfer traffic between the bridges if required.

• Improved resilience through the ability to manage incidents or maintenance by running 2-way traffic on either bridge.

• Sylvan Beach Esplanade intersection realigned to provide safer turns.

• Widening Caboolture-Bribie Island Road to 4 lanes from Bestmann Road East to Benabrow Avenue.

• Installation of traffic signals at Sandstone Point Hotel access.

• Active transport path connections on the island and the mainland.

• Pelican perches overhanging the water on both bridges.

What’s Next?

The project is currently in the tender phase, with four local contractors involved in pricing the works. The upgrade is expected to be valued at approximately $300 million.

So if you’re sick of those long lines at the bridge, kick them nasty thoughts, there’s a big upgrade coming.