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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:Early-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 constructing approximately 5km of new road alignment on the existing road corridor parallel to the existing road to a finished road level of approximately 4 metres.


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 $62.3 million towards this $77.9 million project.


Project development activities commenced in July 2018, with early construction works expected to commence in early-mid 2019 (noting that as the project is still in the development phase, the construction timeline is indicative only and subject to change).

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: 6/11/2018