The West Gate Tunnel Project, which commenced construction in 2020, is a major infrastructure initiative designed to improve Melbourne’s road network by easing congestion and enhancing connectivity. The project features a 6.5-kilometer toll road, including 2.8 kilometers of twin tunnels running beneath the Yarra River. These tunnels will provide an alternative to the heavily congested West Gate Bridge, reducing reliance on the existing structure and offering a more efficient route for commuters and freight transport.

In addition to the tunnels, the project includes widening the West Gate Freeway, constructing new bridges, and creating improved access to key industrial and commercial hubs. A key objective is to improve freight efficiency, particularly for trucks traveling to and from the Port of Melbourne, by reducing travel times and minimising bottlenecks. The upgraded road network is expected to enhance overall road safety, support economic growth, and provide new cycling and pedestrian paths, contributing to a more sustainable transport system.

With a total project value of $11 billion, the West Gate Tunnel Project is a significant investment in Melbourne’s future transport infrastructure. The construction is being carried out by CPB Contractors and John Holland, with CPB Contractors responsible for the $3.3 billion tunnel section. Once completed, the project is expected to significantly cut travel times, ease congestion on local roads, and improve air quality by reducing traffic-related pollution in residential areas.

The WestConnex Rozelle Interchange consists of a 17 kilometre network of tunnels functioning as a new underground motorway interchange which provides connectivity to the M4-M5 Link Tunnels, the new M8 tunnels and the City West Link.

The interchange also provides an underground bypass of the congested Victoria Road between the Iron Cove Bridge and the Anzac Bridge, and a stub connection to the future Western Harbour Tunnel.

The M8 Motorway, formerly known as The New M5, is a 9-kilometre twin road tunnel stretching from Kingsgrove to St Peters, making it the longest road tunnel in Australia.

The project involved 18,000 workers who collectively spent 21 million hours on the job.

The M8 includes a four-level interchange at St Peters featuring 10 bridges, two of which span the Alexandra Canal.

The M4 East Motorway, a significant part of Sydney’s WestConnex project, is a 7-kilometre roadway including a 5.5-kilometre tunnel. This project was completed in 2019.

It links North Strathfield to Haberfield, enhancing transport networks by providing three lanes in each direction.

The motorway’s objectives include improving traffic flow, facilitating urban revitalisation along Parramatta Road, and better integrating Sydney’s west and south-west with the city, airport, and port.

The North East Link (NEL) is Victoria’s largest road project and represents the ‘missing link’ in Melbourne’s transport network. The project will connect the M80 with the Eastern Freeway linking key growth areas in the north and south-east. It includes upgrades to the Eastern Freeway, a dedicated Doncaster Busway, more than 25 kilometres of new and upgraded cycling and walking paths, and improvements to community facilities including local sports grounds.

The $11.1 billion major works contract will be delivered in an Australian first four-partner public-private-partnership with an incentivised target cost (ITC) – a fundamentally more collaborative contract where risk and reward are shared. The scope of the PPP includes:

– 6.5km tunnels to Watsonia

– Interchanges at Lower Plenty Road and Manningham Road

– 5 MCGs of parklands along Banyule Creek at Borlase Reserve

– 2km tree-lined boulevard for Greensborough Road

– 2 hectare Yarra Link green bridge over Bulleen Road

– 3 new wetlands along the Yarra River and Koonung Creek in Bulleen and Balwyn North

– The construction and commissioning of the twin, three lane, and 6.5 kilometre tunnels

– The long-term operation and maintenance of the entire North East Link corridor over a 25-year contract

Construction begun in 2022 and is expected to be completed in 2028, alongside other North East Link packages.

The Legacy Way Tunnel, formerly known as the Northern Link Tunnel, is a major infrastructure project located in Brisbane, Queensland, Australia.

It serves as a key arterial link, significantly reducing travel time between the western suburbs and the inner city.

The tunnel connects the Western Freeway at Toowong with the Inner City Bypass at Kelvin Grove, spanning approximately 4.6 kilometres.