The Northern Territory will get $280 million for upgrades to two major outback highways in Tuesday's federal budget.
It includes $180 million for the Central Arnhem Road as well as $100 million to upgrade the Buntine Highway.
There is also $1.5 billion for the Roads of Strategic Importance - Northern Australia Package, and $160 million to seal more sections of the Outback Way across the continent.
"This budget will deliver certainty for residents and businesses," Country Liberal Party Senator Nigel Scullion said.
NT Attorney General Natasha Fyles said the Gunner Labor government welcomed any investment given the difficulties of delivering services in remote areas.
"We want the federal government to acknowledge the work we're doing in the Northern Territory to close the gap (in indigenous health)," she said.
The federal government has already flagged a new Medicare item that will support the delivery of dialysis in remote areas to improve access for Indigenous people with kidney disease.
It also recently agreed to provide $550 million in matching funding with the NT government for remote indigenous housing.