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Thomas Road to South Western Highway Tonkin Highway extension

Cardup, Darling Downs, Mundijong,


  • Road

    Project type
  • $505 million

    Total budget
  • In Planning

    Project phase
  • Main Roads WA

    Lead agency
  • TBC

    Jobs supported

This project involves extending Tonkin Highway from Thomas Road, Oakford to South Western Highway, south of Mundijong. Approximately 14 kilometres of four lane dual carriageway from Thomas Road to South Western Highway will be installed.

Construction and upgrades of intersections at Thomas Road, Orton Road, Mundijong Road and South Western Highway will also be included.

A grade-separated interchange at Bishop Road and bridges over the existing freight rail line will be installed as part of the project.


  • Alleviate pressure on the existing transport network
  • Improved road safety and reduce congestion for all road users
  • Improved freight efficiency, connectivity and travel time

Project map

This map shows an aerial view of the project location.
Project work area

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