Warringah Freeway Upgrade, Sydney, NSW

Working within Australia’s busiest road corridor required complex construction and traffic staging designed to be integrated with permanent works designs. Arcadis’ temporary and permanent works design teams worked with the construction team to develop the project’s staging strategy.

Constructability was a key component to our project success and was embedded at the centre of our design decisions. Our design incorporated complex traffic staging with multiple constraints including retained infrastructure, entry/exit ramps, existing utilities, large retaining walls and ITS infrastructure to support the project.

Many of the bridge works on the project included strengthening, rehabilitation and widenings of the existing bridges built in the 1960s. Key activities such as site inspections, material testing and load rating provided critical insights into the condition and remaining service life assessment of these assets. This enabled informed and collaborative design decisions that maintained or enhanced the asset’s aesthetics and performance, whilst ensuring the required design life of the asset was met.

Arcadis' commitment to sustainability went beyond design. The Arcadis team implemented substantial new sustainability initiatives on this project to reduce embodied emissions and implement better awareness and outcomes for sustainability, delivering 25% emissions reductions relative to the reference design. Arcadis established a new standard for asset attribute data for future asset maintenance, measuring carbon footprint through the connection of digital models from our sustainability team. To further eco-conscious initiatives, Arcadis co-designed and built new shared-use paths, promoting active transportation to alleviate traffic congestion.