The Gold Coast’s first Diverging Diamond Interchange (DDI) has replaced the pre-existing roundabout at Burleigh Exit 87, as part of the $1 billion dollar Pacific Motorway M1 Varsity Lakes and Tugun (VL2T) upgrade, funded by both the Australian and Queensland Governments. The DDI reduces traffic congestion, by enabling two directions of traffic to cross on the opposite of both sides of two bridges, safely guided by traffic signals, signage and road markings.

BG&E led structural design services for SMEC to support development of the twin bridges, which are central to the DDI and the flow of all traffic between Southport-Burleigh Road, Oyster Creek Drive and the M1.

The new interchange configuration will improve road safety, increase transport capacity and provide better active transport connections for the Gold Coast, which is experiencing a population boost post-COVID-19.