WestConnex

With one of the most experienced and cohesive road engineering teams in Sydney working on the project, the Arcadis team used innovative civil engineering solutions to overcome challenges in completing designs parallel to the planning approval process and traffic modeling and working flexibly to accommodate major changes while keeping up with key project milestones.

Following the M4 project, Arcadis, in a joint venture with WSP, provided all civil, structural and building design services for contractor John Holland CPB Lendlease in the WestConnex Rozelle Interchange project, considered one of the most complex underground junctions ever built. The project connects the M4-M5 Link to the Anzac and Iron Cove bridges, and the future Western Harbour Tunnel and Beaches Link.

The design included several key elements of the project from structural and geotechnical works to traffic and intelligent transport systems. Meeting the challenge of having to design multiple tunnels in a small area and designing an interchange with reduced footprint on the surface and moving forward with an all-underground design, Arcadis also successfully ensured that buildings and other structures above tunnel were not damaged as a result of the tunnel build.

The WestConnex Rozelle Interchange is part of the M4-M5 Link and will provide an underground motorway interchange to City West Link, as well as provide an underground bypass of Victoria Road between Iron Cove Bridge and Anzac Bridge, with links to the future Western Harbour Tunnel. The Rozelle Interchange is being built almost entirely underground, freeing up space for a new 10ha regional park, which will provide local community amenities such as sporting fields, walking areas and open communal spaces.

These benefits significantly unlock opportunity for neighborhood revitalisation, improvement of north-south travel times for public buses accessing the Western Rail Line at Burwood and other stations, and deliver more than $20 billion in economic benefits to NSW.