Arnhem HighwayArnhem Highway is a 227 kilometre highway in the Northern Territory, Australia. It links the mining town of Jabiru, [Northern Territory|Jabiru], in Kakadu [National Park], to Stuart Highway at a point 35 kilometres south of Darwin.UpgradesThe Northern Australia [Roads Program] announced in 2016 included the following project for Arnhem Highway.Floodplain upgradeThe project to upgrade the Adelaide River floodplain is to be complete in early 2022 at a total cost of $77.9 million.