Announcing the proposal on Sunday, Premier David Crisafulli and Transport Minister Brent Mickelberg said community consultation on the plans will be open until the end of November, with geotechnical investigations to start this week.
A new four-lane bridge is slated to double capacity of the existing bottleneck. The current bridge is to be retained as a dedicated active transport crossing for pedestrians and cyclists to and from the island north of Brisbane.
"The Bribie Island Bridge is a gateway to a beautiful part of the world, and we want people, whether they live here or they want to come and visit here, to be able to do so safely and do so accessibly," Crisafulli told reporters on the island.
"And this is a game changer for the region. But, more importantly, it fulfils a promise we made that people here heard about for a long, long time. I believe when you say something, you do it, and we're living that."
The LNP's Ariana Doolan won the Pumicestone seat encompassing the island at the 2024 election from one-term Labor MP Ali King. Labor had previously dismissed long-standing LNP calls for a new bridge. In the months before the 2024 poll, then-premier Steven Miles said Labor would duplicate the bridge at an estimated cost of $700 million, before a business case had been finalised -- a move the LNP dubbed a "bribe".
An April 2025 summary of the business case has since been released.