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Arnhem Highway - Adelaide River Floodplain Upgrade

Funding Program:Northern Australia Roads Program
Status:In planning
Transport Mode:Road
Expected Start/Finish:Mid 2019 - Late 2020
Estimated Project Cost:$77,880,000
Australian Government Contribution:$62,300,000
Local Council/Shire:Coomalie Community Government Council

Project Description

The Arnhem Highway is the major land transport route between the Stuart Highway and Kakadu National Park. In addition, the Arnhem Highway services the towns and communities of Humpty Doo, Marrakai, Corroboree, Jabiru and Arnhem Land.

This project involves the relignment of approximately 6.5km of the Arnhem Highway across the Adelaide River Floodplains. The new alignment will be parallel to the existing road and will raise the height of the road by 1.3 metres above the current level. 


This project will improve road reliability for road users between the Stuart Highway and Mount Bundy.

The project will provide the following benefits:

  • improved flood immunity at the Adelaide River floodplain
  • increased route reliability and accessibility on the Stuart Highway
  • reduced duration and frequency of road closures, through improved pavement strength and flood immunity.


The Australian Government has committed up to $62.30 million towards this $77.88 million project.


Early construction works expected to commence in mid 2019 and expected to be completed late 2020.

Disclaimer: The material contained in this site is made available on the understanding that the Department is not thereby engaged in rendering professional advice for a particular purpose. Before relying on the material in any important matter, users should carefully evaluate the accuracy, completeness and relevance of the information for their purposes and should obtain appropriate professional advice relevant to their particular circumstances.

Project details last updated: 23/01/2019