Australia’s-first Diverging Diamond Interchange revealed

In an Australian-first, the Bruce Highway’s Caloundra Road interchange is being transformed into a Diverging Diamond Interchange (DDI) with the opening of the first stage to traffic on Thursday morning 28 November 2019.

Diverging Diamond Interchange

Will MacDonald, Seymour Whyte Regional Manager – Northern, said the first stage traffic switch is a major milestone for the project to expand capacity and improve travel times for road users.

The DDI’s innovative design is cost effective because it minimises the project footprint – as it requires less bridges and roads – while also tackling congestion, enhancing capacity, improving safety and providing active transport connections.

The DDI at Caloundra Road will be opened in stages over the next 12 months to fast-track construction works. East and westbound travel will change at the Caloundra Road interchange. These are the first two stages of the DDI opening and are expected to occur within a two-week period.

Diverging diamond interchanges improve efficiency and safety by reducing the number of crossing conflict points compared to traditional interchanges – which have right-turning lanes in the middle of the road and drivers must wait for oncoming traffic to pass before turning right.

The DDI will allow motorists to turn right without giving way to, or blocking traffic, coming the other way. Synchronised traffic signals, line marking and signage will guide motorists seamlessly through the interchange and towards their destination.

Will MacDonald said, “This milestone is a great achievement by our team, suppliers, subcontractors, designers, and our client – and is testament to our team relentlessly looking for smarter ways to deliver innovative infrastructure solutions for our communities.”

“The Diverging diamond interchange is a really exciting, challenging and innovative concept, and I’d encourage everyone to see how the DDI works on the project website”, he added.

The Bruce Highway upgrade - Caloundra Road to Sunshine Motorway project is being delivered by a Fulton Hogan Seymour Whyte Joint Venture.