The New M5 section of Sydney’s WestConnex, also known as the M8 Motorway, provides 9 kms of twin road tunnels between Kingsgrove and St Peters making it the longest road tunnel in Australia. 18,000 workers spent 21 million hours to deliver the project with tunnelling continuing 24/7 at a total cost of $4.3 billion. The project included construction of a four-level interchange at St Peters built on a remediated landfill site. The interchange works included 10 bridges, two of which span the Alexandra Canal, and the longest being 288 metres.


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WestConnex M8 Motorway