The Tram Grade Separation Projects (TGSP) Alliance, comprising of CPB Contractors, McConnell Dowell, Mott MacDonald, Arup, the Department for Infrastructure and Transport (DIT), and sub-Alliance partner, Aurecon, has removed three congested tram level crossings along the Glenelg tram line and built new overpasses, making journeys safer and more reliable, and improving connectivity for trams, cyclists and pedestrians.

As part of the TGSP Alliance, our multidisciplinary team provided integrated services spanning rail, civil and structural engineering, transport planning, sustainability services and design management.

The $870 million Tram Grade Separation Projects have streamlined movement for pedestrians, cyclists, drivers and public transport users, by eliminating congested crossings and improving connection between suburbs either side of the tram lines, as well as creating new community and recreation spaces under the overpasses.

Collaborative Alliance for accelerated delivery

We worked in partnership with Alliance partner Mott MacDonald and sub-Alliance partner Aurecon, in developing the civil and structural design strategy.

Working under an integrated alliance framework, the partners shared risk, co‑located teams and made agile, data‑driven decisions to coordinate simultaneous work across five sites. Daily collaboration and open communication channels kept programme and safety priorities aligned.

Digital engineering management played a crucial role in connecting design and construction disciplines. A shared digital model enabled real‑time issue resolution, streamlined approvals and improved stakeholder engagement through the visualisation of complex interfaces. This digital integration helped maintain programme certainty and supported evidence‑based decisions at every stage of delivery.

We strengthened collaboration further by seconding team members into construction‑phase roles, embedding design expertise directly within site operations. This on‑the‑ground support accelerated design resolution, quality assurance and engagement with delivery partners, all leading up to the return of tram services in late January 2026, in time for the start of the school year.

Construction site of new bridge and roadworks

South Road tram overpass bridge under construction © Department for Infrastructure and Transport

Partners & collaborators

Department for Infrastructure and Transport | CPB | McConnell Dowell | Mott MacDonald | Aurecon