Arnhem Highway - Adelaide River Floodplain Upgrade


The Australian and Northern Territory Governments are funding a $77.88 million upgrade of 6.5 kilometres of the Arnhem Highway across the Adelaide River Floodplain.

The project will reduce road closures during the wet season along the Arnhem Highway due to flooding of the Adelaide River, resulting economic and safety benefits for road users.

The upgraded section of the highway will be built next to the existing road alignment, which will include:

  • raising the height of the road
  • drainage structures (13 bridge structures) along the new alignment.


Cost - $77.88 million

  • Northern Territory Government $15.58 million
  • Australian Government $62.3 million

Project commencement – August 2019

Project completion – Mid-2021


For any queries or further information about the project, please email or call the project hotline number on 1800 560 308.

Last updated: 20 October 2019