Global law firm Ashurst and local firm Clayton Utz advised on a transaction to build an A$1.6 billion (US$1.1 billion) bypass of the Queensland city Toowoomba, which opened last week.

Clayton Utz acted as legal advisers to the Queensland government on the 41 kilometre heavy vehicle bypass route to the north of Toowoomba, from its 2012 business case through its procurement and delivery.

Ashurst advised Nexus Infrastructure, a consortium comprising Plenary Group, Cintra Infraestructuras Internacional S.A., Acciona Concesiones S.L., Acciona Infrastructure Australia, Ferrovial Agroman Australia and Broadspectrum, which designed and constructed the bypass and will operate and maintain it on behalf of the Queensland government.

The Ashurst team was led by partners Gareth Sage, Mark Disney and Simon Irvine.

"We are delighted to have advised Nexus Infrastructure on the Toowoomba Bypass project throughout the bid and delivery phases," Sage said. "It was one of Queensland's highest priority infrastructure projects, the largest Australian government commitment to a single regional road project in Queensland history, and we are very pleased to have played a role in its delivery."

Clayton Utz major projects and construction partner David Lester led the firm's team, which advised the Queensland government on all aspects of the project, from managing environmental approvals, land acquisition, native title and cultural heritage issues, through to procurement issues and contract management.

Other key members of the team were partners Frazer Moss, Shae McCartney and Alan Maguire.

"Clayton Utz prides itself on being the go-to law firm when government is looking to deliver major infrastructure, and it was great to be able to bring the diverse and specialist experience of our team together on a project such as this," Lester said.

"The Toowoomba Bypass is a critical piece of road infrastructure that is going to deliver many benefits for our national and regional freight network, as well as for the residents of the Toowoomba and Lockyer Valley regions."

The Toowoomba Bypass will help to alleviate pressure on roads in the city 125 kilometers west of Brisbane, diverting heavy vehicle traffic around the north of Toowoomba rather than through the CBD. It will also reduce travel times across the range and contribute to improved road and driver safety, Clayton Utz said.