Abstract
The A$1·95 billion (£1·3 billion) Ipswich motorway upgrade near Brisbane was Australia's largest road infrastructure alliance. Origin Alliance – comprising the client, two designers and three contractors – was tasked with transforming an existing substandard four-lane motorway into a modern, intelligent six-lane highway with a future capacity for eight lanes using network-managed hard-shoulder running. Only 8·5 km long, the upgrade demanded an unprecedented level of temporary traffic management for up to 100 000 vehicles a day. This paper outlines the complexities in design and construction and the means by which works were planned to guarantee the utmost level of safety to the travelling public and on-site workforce.
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