Swan St Bridge Upgrade

Transforming existing infrastructure into a dynamic landmark that enhances connectivity between Melbourne’s iconic precincts.

BKK Architects have reimagined the existing 60+ year old Swan Street Bridge, transforming this critical city arterial to relieve traffic congestion, improve pedestrian and cycling infrastructure, and frame a distinctive urban landmark that draws from its context and celebrates movement through the city.

Built in 1952 in anticipation of the Melbourne Olympics (1956), the Swan Street Bridge spans the Yarra River (Birrarung) in inner-city Melbourne, linking the sporting and recreation precincts with the Royal Botanic Gardens, the arts precinct, and the CBD beyond. As Melbourne grew, this historic piece of infrastructure became both a vital east-west connection and a notorious traffic bottleneck. Appointed via a competitive design process, BKK Architects’ design has introduced an additional traffic lane and a new 4m wide cantilevered shared user path on either side of the existing structure, transforming a utilitarian thoroughfare into a dynamic urban connector. The new works draw inspiration from significant architectural and engineered structures within the immediate surrounds, enhancing the user experience, and providing a new identity for the existing bridge.

Client: VicRoads
Location: Melbourne, VIC
Country: Wurundjeri Woi-Wurrung
With: McGregor Coxall
Year: 2016 – 2018

Big Picture Thinking

Bridges play a crucial role in how we experience cities, connecting important districts while featuring in the daily rituals and journeys of residents and visitors alike. The Swan Street Bridge is one such vital connection, linking Melbourne’s CBD with world-renowned sporting and recreation precincts, and participating in the day-to-day experiences of thousands of people. Adapting the existing structure, rather than building a new bridge, was deemed the quickest way to achieve the required increased capacity of up to 30,000 vehicles per day whilst minimising the environmental footprint of the project. The lack of planning approvals required for this approach provided further efficiency in our process, enabling us to bypass the often lengthy planning delays and complex approvals processes associated with new bridge infrastructure

While the project was initiated to solve an immediate functional problem – growing traffic congestion – we applied an urban design approach to achieve wider impact. Seeking to enhance the user experience for pedestrians, cyclists, and motorists alike, we converted the existing, narrow footpaths into an additional traffic lane and added generous 4m-wide shared user paths that cantilever dramatically from either side of the existing structure. A fundamental design consideration was ensuring these paths could operate comfortably during peak periods, particularly during major sporting events. We established carefully sized landings at each end to alleviate crowd congestion while creating new community gathering spaces with views along the river for events such as Moomba.

Collaboration and Humility

As a practice, we pride ourselves on our ability to collaborate with and integrate diverse team members’ expertise to benefit each project outcome. Delivering this project within an extremely tight program and in a live environment required exceptional coordination across disciplines, with our integrated team approach bringing together architectural vision, landscape connectivity, structural innovation, and lighting design to develop a cohesive “kit of parts” solution that maintained traffic flow throughout construction. Working closely with landscape architects McGregor Coxall, we created seamless connections between the new shared paths and existing pedestrian networks and ensured the abutments were anchored into the river banks through the incorporation of terraced planting zones to treat water collected from the new shared user paths. Our collaborations with lighting designer Relume resulted in the lighting design becoming a key feature that enhances the bridge’s identity as a vital gateway between the city and the Eastern suburbs.

Our collaborative team approach was complemented by our relationship with VicRoads engineers, who brought passion and expertise to the structural design and logistical considerations. VicRoads dedicated substantial resources to the project in recognition of the tight project timeframes, defining a shared sense of responsibility between architect and client that was critical to the project’s success and to achieving a genuinely innovative solution. With BKK retained on the client side during construction, under the design and construct contract, our team also had greater agency to defend the design intent and to drive the best possible design outcome.

Playfulness and Innovation

Utilising parametric design modelling, we developed an array of highly articulated steel fins that support the cantilevered shared user paths and derive their form directly from the bridge’s existing arched geometry, providing a series of scalloped forms in plan and elevation. This design methodology allowed us to test different parameters such as depth of fins, spacing and overall geometry in a live working model, which fed directly into the documentation outputs, and ultimately the steel fabricator’s shop drawings. This flexible approach enabled us to rapidly test the design against project requirements, maximising efficiency and standardisation as a means of addressing the constrained site conditions and logistics associated with offsite fabrication and transport.

The steel fins were designed to align with the river’s orientation — at 45 degrees to the bridge itself — maximising views along the river corridor while providing a dynamic experience that varies from different viewpoints. This geometry extends to the bridge abutments, which anchor the shared user path landings through a series of staggered, monolithic stone forms that preserve a strong visual connection to the existing bridge. The oar-shaped fins provide a playful reference to the local rowing clubs, and glow in purple-pink neon after dark, transforming the bridge into a vibrant nighttime landmark that compliments the nearby architectural icons of Melbourne’s sporting and entertainment precinct.

For

VicRoads

With

McGregor Coxall

Sector

Urban Design

Status

Completed

Year

2016 – 2018

Location

Melbourne, VIC

Country

Wurundjeri Woi-Wurrung

Photographer

John Gollings

Derek Swalwell

Awards

2019 Australian Urban Design Awards, Shortlisted, Built Outcomes – Local and Neighbourhood Scale

2019 Melbourne Design Awards, Shortlisted, Urban Design

2019 AIA Victorian Architecture Awards, Shortlisted, Urban Design

Swan St Bridge Upgrade

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