Work started to seal the Eyre Highway from the Norseman end, reflecting a shift from graded dirt tracks toward all-weather, bitumen road access across remote areas. This early 1960s push helped set a model for later remote highway programs: long, staged upgrades financed over multiple years.
South Australia completed sealing between Port Augusta and Ceduna, a major step in converting the long-distance outback road into an all-weather highway. This reduced closures from rain and weakened “bulldust” surfaces and supported more dependable remote travel and freight movement.
A Commonwealth Department of Construction map documented Northern Territory road surface types in mid-1968. This kind of inventory mattered because sealing decisions depended on knowing which routes were already formed, gravelled, or sealed—and where wet-season cutoffs were most likely.
Western Australia finished its section of sealing on the Eyre Highway, marked by a ceremony at Eucla. Completing this segment improved reliability on a key cross-Nullarbor route and increased pressure to finish remaining unsealed links on the South Australian side.
The Victoria Highway corridor (linking the Katherine region toward Western Australia) was designated as part of the National Highway system in 1974. That status strengthened the case for major upgrades and sealing because the route served freight, pastoral operations, and access to remote communities.
The National Roads Act 1974 created a national framework for Commonwealth involvement in funding and developing major roads. For remote Australia, this helped underpin sustained investment on long, thinly populated corridors where state and territory budgets alone often struggled to fund major sealing and reconstruction.
Australia’s Year Book (1977–78) described completed and ongoing multi-stage programs to upgrade key Northern Territory highways, including the Stuart and Barkly, and noted wider attention to “development roads” serving remote outback communities. It also quantified the network, showing thousands of kilometres of roads were still unsealed by mid-1976—illustrating the scale of the remote-access challenge.
The final unsealed link on the Eyre Highway in South Australia—between Penong and the Western Australia border—was sealed, completing the route’s conversion to continuous bitumen. This was a milestone for reliable remote-access travel across the Nullarbor, lowering the risk of rain closures and vehicle damage on long-distance trips.
By late 1978, sealing on the Great Northern Highway had reached Newman, strengthening a major outback freight link in Western Australia. While outside the NT, this mattered for remote access because WA’s northern sealed corridors connected to cross-border routes and helped integrate remote supply chains supporting mining and pastoral regions.
The Stuart Highway—the main north–south spine through the Northern Territory—became fully sealed in February 1987 as part of Australian Bicentenary roadworks. Sealing improved year-round access between remote towns and reduced the heavy maintenance burden and wet-season disruptions that had affected travel, freight, and emergency services.
By the early 1990s, the Victoria Highway had been fully reconstructed and sealed to a good standard. This completed a major remote-access corridor linking communities and industries across the Top End and toward Western Australia, supporting road trains, tourism, and supply deliveries with fewer closures and smoother travel.
A 1996 petition tabled in the Northern Territory Legislative Assembly called for upgrades to the Tanami Road, showing that major remote routes still lagged behind sealed-highway standards. It reflects how communities and road users pressed for safer, more reliable access in areas where unsealed roads could become corrugated in dry seasons and impassable in wet seasons.
Documentation of Australia’s National Route system notes that Highway 1 was extended as more sections were sealed, but that the entire route was still not sealed. This underscores a key outcome of 1960–2000 outback programs: large gains on priority corridors, but a continuing backlog of remote sealing needs on lower-traffic links.
Australian Outback road sealing and remote-access programs (1960–2000)