Toowoomba Bypass

Toowoomba, Queensland, Australia

Toowoomba Bypass
Toowoomba Bypass
Toowoomba Bypass

The Toowoomba Bypass is a 41-kilometre bypass which runs to the north of Toowoomba from the Warrego Highway to the Gore Highway via Charlton. The project was one of Queensland’s highest priority road infrastructure projects.

The project will assist in reducing travel time across the Toowoomba range by up to 40 minutes. It will redirect trucks from local roads in Toowoomba’s central business district and enhance freight efficiencies.

Plenary is part of the Nexus Consortium contracted by the Queensland Government to finance, operate and maintain the project for 25 years.

The road partially opened to traffic in December 2018 and was fully completed and operational by September 2019.

Design features

Some of the key features of the Nexus design solution:

  • Four lanes from Warrego Highway East Interchange to Warrego Highway West
  • Grade separated interchanges at Warrego Highway West, Toowoomba-Cecil Plains Road and Gore Highway
  • A grade-separated connection to Mort Street
  • An approximately 30-metre cutting at the top of the range constructed as an alternative to the tunnel solution
  • An 800-metre-high viaduct built over the existing Queensland Rail line; and
  • Continuity of the New England Highway through a new bridge over the cutting.


Key design innovations revolved around the 800-metre-high viaduct which allowed the removal of the tunnel which was part of the reference design. This resulted in allowing all vehicle classes to utilise the bypass, removing dangerous goods and over dimensioned vehicles from Toowoomba city centre.

The Nexus design also minimised the size of the cutting at the top of the range to reduce the impact on the existing landscape.

Local economic impacts

Nexus recruited around 75% of subcontractors and labour from the greater Toowoomba region, assisting in the creation of up to 1800 full time jobs during construction and maintenance of the project.