Australia's National Highway Network has had a number of changes since the
National Roads Act 1974 was originally established in 1974. The 1974 Act empowered the Federal
Minister for Transport to declare as a National Highway, any existing or proposed road in a
State, which (in the Minister's opinion), was the main route between two
State capitals; a State capital and
Canberra; a State capital and
Darwin;
Brisbane and
Cairns;
Hobart and
Burnie; or any other road which, in the Minister's opinion, was important enough to be a National Highway. Subsequent replacement legislation in 1977, 1988, and 2005, along with other intervening amendments, contained similar provisions. Notably, important roads to near-metropolitan locations such as
Geelong,
Bunbury and
Wollongong were added in 2005, although not within the original concept of interstate National Highways.
Original routes included in 1974 The original components of the National Highway were officially declared on 20 September 1974, as "links" and terminated at the edge of each capital city. The parts of the routes within the major urban areas were not defined as National Highways, and the
Sturt and
Newell highway routes were not included in the original 1974 network. In June 1995, as a condition of federal funding, the National Highway route in New South Wales was required to remove existing tolling on the
former F3 and
former F6 inter-urban freeways, even though the former F6 did not become part of a National Highway until 2005. The Sydney to
Adelaide route via the
Hume and Sturt highways, and the
Melbourne to
Brisbane route via the Newell Highway, were added as links of the National Highway network in November 1992 under the 1988 Act, however the decision to use the route from
Goondiwindi to Brisbane via the
Gore Highway and Toowoomba, rather than the
Cunningham Highway (via Warwick), was not finalized until October 1993. As sections of existing highways were upgraded or replaced by nearby parallel routes of a new higher standard, the "National Highway" designation was usually moved onto the new part of the route. The principal route between Sydney and Newcastle was shifted from the old
Pacific Highway onto the new Sydney-Newcastle freeway in nine separate stages between 1966 and 1999 as the freeway was progressively implemented. Similar changes were made as the Hume Highway was re-developed. are: • the Pacific Highway route between Newcastle and Brisbane • the route between Townsville and Mt Isa • the route from Sydney (or Eastern Creek) to Dubbo via the M4, Great Western and Mitchell highway • the Calder Highway route from Melbourne to Mildura via Bendigo • the Southern Freeway and Princes Highway route from Sydney to Wollongong • the Princes Freeway from Melbourne to Geelong • the Monash Freeway, Princes Freeway and Princes Highway to Taralgon and Sale • the route between Perth and Bunbury • the route from Launceston to Bell Bay • some additional urban connecting routes linking ports and airports and linking the national routes, and forming urban growth corridors, a complete definition of the network as of 2005 is included in the schedule of the 2005 Act • The route description for the Cumberland Highway ( Pennant Hills Road ), between the junctions with the M2 motorway and the F3 Sydney-Newcastle Freeway, was altered. Almost all of the original Cumberland Highway route from Prestons to Wahroonga, established in the 2005 network, was deleted due to the opening of the M7 motorway.
Changes to the National Land Transport Network made in 2008 • The route description of the national route consisting of part of the Princes Freeway and Princes Highway between Melbourne and Waurn Ponds (west of Geelong), was altered. • The proposed Townsville Port Access Road was added. • The proposed Tiger Brennan Drive extension in suburban Darwin was added.
Changes to the National Land Transport Network made in 2009 • The portion of the
M4 Western Motorway in Sydney, between
Eastern Creek and
Strathfield was added. • The part of the
Princes Freeway, and
Princes Highway, west of Melbourne which is included in the National network, was extended from
Waurn Ponds to
Colac. • A section of the
Great Eastern Highway and the Great Eastern Highway Bypass in suburban Perth was added. • Alteration to the definition of the
South Road route in Adelaide and addition of the access road to Adelaide Airport. • The
Townsville Ring Road was added • The
Karratha–
Dampier Road and part of the
North West Coastal Highway was added. • The
Bunbury Port Access Road and part of the
Wilman Wadandi Highway were added. • Part of the Hobart–Burnie route was altered. ==Urban components of the national land transport (road) network==