Cunningham Highway (Ipswich - Warwick), Eight Mile intersection upgrade

An overpass is being built at the Cunningham and New England highways intersection to improve safety.

The Eight Mile intersection is a significant crossroad located 8 miles (or 12.87km) north of Warwick where the Cunningham and New England highways meet. It is a major rural intersection for traffic between Brisbane, Warwick and Toowoomba.

The project involves building an overpass for motorists travelling south from Toowoomba to Warwick. Other traffic movements at the intersection will remain at ground level which will be upgraded to improve safety and efficiency. Traffic on the Cunningham Highway will travel underneath the overpass.

Benefits

  • Returns local roads
  • Improves safety
  • Increases capacity
  • Improves network efficiency
  • Increases traffic flow
  • Reduces travel time
  • Contributes to regional growth
  • Reduces maintenance
  • Improves ride quality
  • Contributes to economy

Key features

  • Single lane overpass for traffic on the New England Highway travelling from Toowoomba to Warwick.
  • Bridge clearances of 6.1m on the Brisbane-bound carriageway and 7.1m on the Warwick-bound carriageway to provide for over-dimensioned vehicles.
  • Construction of 1.5km of new roadway to allow for approaches to the overpass and a new Toowoomba to Brisbane exit/merge lane.
  • Installation of 2 new culvert structures to assist with site drainage.
  • Installation of new lighting and improvements to existing lighting using LED luminaires.
  • Installation of a new traffic monitoring camera.

Funding

This project is jointly funded by the Australian and Queensland governments on an 80:20 (federal:state) basis as part of the National Land Transport Network Upgrade program. Investment ID 1248007

Total investment
$25 million
Australian Government
$20 million
Queensland Government
$5 million

Current status

Construction on the intersection started in February 2021 and it is expected to be completed by August 2022, weather and construction conditions permitting.

Eight Mile intersection project map

Eight Mile Intersection upgrade map

Project update

The project achieved a major milestone in early March 2022 when crews successfully positioned 10 super T girders to create the platform for the new overpass. A 500t wheel track crane was used to carefully place the girders, each weighing between 75–85t and measuring over 1.8m high and 33m long. Works were undertaken overnight to minimise the disruption to traffic at this major intersection of the 2 highways. This major project milestone was achieved during a declared extreme weather event, which saw many road closures across South East Queensland and Northern NSW.

Image of a super T girder being lowered into place for the overpass at Eight Mile intersection in March 2022
A super T girder being lowered into place for the overpass at Eight Mile intersection (March 2022)