The project, built by a consortium led by ACCIONA, alongside BDM Constructions and Ghella, has contributed to the development of motorways around Brisbane characterized for their sustainability in the construction process, efficiency, comfort and resulting journey time savings.
Legacy Way has improved the traffic flow and connections between metropolitan areas and the city’s airport, halving the journey to 14 minutes with minimum impact on the local habitat.
During the construction of the tunnels, the emission of over 1,000 tonnes of CO2 was avoided thanks to the solution chosen for removing rubble, ridding the project of the need for nearly 10,500 truck journeys. Noise was also reduced on site, as was the impact of pollution and dust on local vegetation.
The tunnels were built by two enormous tunnel boring machines (TBMs), Joyce and Annabell, each over 100m long, 2,800 tonnes heavy and 12.4m in diameter. They drilled through earth at an average rate of 701.8 meters per month, breaking world records for excavation speed, a feat fully recognized by the engineering world. In one month alone, they drilled 858.1m and in one day managed to excavate 49.7m of earth.
Legacy Way has won several awards to date, such as the“Brisbane Lord Mayor's Award for Innovation (2012)”, the “2013 International Tunneling Project of the Year”, the “International Association of Public Participation, Winner in the Infrastructure Category (2014)”, the “International Road Federation Award for Environmental Excellence (2014)”, and the “Infrastructure Partnerships Australia Project of the Year (2015)”.
Improve connections between the metropolitan areas and Brisbane airport in the third biggest city in Australia.
Faster displacements, journeys halved. The project avoided 10,403 trips to remove rubble, and over 1,000 tonnes of CO2 emissions, during construction.
TBMs Joyce and Annabell broke world excavation speed records.