Queensland’s second diverging diamond interchange

The New South Wales Government has awarded the contract to build the new $18.5 million Charleyong Bridge across the Mongarlowe River on Main Road 92, north of Braidwood.The Department of Transport and Main Roads (TMR) Queensland is currently underway on designs for the Strathpine Road and Gympie Arterial Road interchange at Bald Hills.

TMR plans to transform the intersection into a diverging diamond interchange— a type of road intersection commonly used in the United States.

Under the design two directions of traffic on a non-freeway road can cross over from the left side to the right side, and then back again, with traffic movements controlled by synchronised signals.

According to TMR right-turning traffic will not have to give way which will decrease the number of needed traffic lights and make the intersection safer and more efficient.

TMR said diverging diamond interchange’s are usually cheaper to construct than traditional interchanges and have less impact on local residents.

The Strathpine Road and Gympie Road interchange will be the second diverging diamond installed in Queensland, following the Bruce Highway Upgrade between Caloundra Road and Sunshine Motorway last year.


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