Victoria Commences Landmark Tunnelling on $33B Suburban Rail Loop East as Giant TBMs Begin Excavation at Clarinda

Historic Underground Excavation Officially Underway on 26-Kilometre Orbital Rail Artery

MELBOURNE, Victoria — In a watershed construction milestone for Australian transport infrastructure, the Victorian Government has officially commenced subterranean tunnelling on Suburban Rail Loop (SRL) East. Marking the physical beginning of tunnel excavation across the 26-kilometre corridor connecting Cheltenham to Box Hill, colossal tunnel boring machines (TBMs) have entered the earth at the Clarinda launch shaft to begin excavating twin underground rail tunnels.

Operated by the Suburban Connect consortium—comprising global tunneling specialists CPB Contractors, Ghella, and Acciona—the massive 1,700-tonne Herrenknecht TBMs represent the first of four customized machines designated to carve the southern tunneling package. The lead TBM, named Aayushi, has commenced subterranean boring, while assembly of the second machine, named Belinda (honoring Australia's first female Puffing Billy steam train driver), is nearing completion ahead of its parallel underground deployment.

Disciplined $33.3 Billion Financial Blueprint Delivers $2 Billion in Procurement Savings

The operational start of tunneling follows a comprehensive cost and design optimization led by Premier Ben Carroll and transport leadership, establishing a disciplined $33.3 billion investment framework for SRL East that delivered over $2 billion in direct procurement savings:

• Optimized Station Interfaces: Redesigning Box Hill and Glen Waverley passenger connections into efficient surface interchanges from day one, substantially reducing complex deep-cavern excavation risks and capital expenditures.
• Institutional Delivery Integration: Transitioning the Suburban Rail Loop Authority into the Victorian Infrastructure Delivery Authority (VIDA), uniting SRL under the exact agency that successfully delivered the landmark Metro Tunnel project.
• Turn-Up-and-Go Orbital Frequencies: Automated driverless four-car trainsets engineered to operate at high frequencies, slashing travel times between major universities, hospitals, and commercial employment hubs across the eastern suburbs.
• Federal Co-Funding Certainty: Sustained multi-billion-dollar funding commitments from the Commonwealth Government under national infrastructure productivity accords, validating SRL as Australia's most vital urban rail link.

Transforming Suburban Productivity Across Monash, Deakin, and Clayton Precincts

Currently, over 80 percent of daily public transit journeys across Melbourne are forced through the central business district via radial heavy-rail lines. Suburban Rail Loop East provides the missing orbital link, connecting Cheltenham, Clayton, Monash University, Glen Waverley, Deakin University at Burwood, and Box Hill directly without requiring commuters to travel through Flinders Street or Southern Cross stations.

When passenger operations commence, commuters will travel from Cheltenham to Box Hill in just 22 minutes, saving up to an hour on return commutes. Crucially, the underground hub at Clayton will serve as a super-interchange connecting Gippsland regional passengers directly to Monash Medical Centre and Monash University without changing trains in the central city.

Sunshine Superhub and Airport Link Advance Complementary Western Rail Strategy

In tandem with eastern orbital progress, Victorian transport executives confirmed the appointment of a preferred delivery partner to transform Sunshine Station into a world-class transport superhub. The Sunshine redevelopment acts as the western gateway for the future Melbourne Airport Rail link and regional lines to Geelong, Ballarat, and Bendigo.

Coupled with government cost-of-living fare caps on public transport cards across Melbourne, Victoria's multi-decade rail infrastructure expansion continues to deliver world-class transit equity, reduced roadway congestion, and sustainable urban connectivity for generations of Australians.