Princes Highway is a major road in Australia, extending from Sydney via Melbourne to Adelaide through the states of New South Wales, Victoria and South Australia. It has a length of 1,941 kilometres (1,206 mi) or 1,898 kilometres (1,179 mi) via the former alignments of the highway, although these routes are slower and connections to the bypassed sections of the original route are poor in many cases.
Sturt Highway is an Australian national highway in New South Wales, Victoria, and South Australia. It is an important road link for the transport of passengers and freight between Sydney and Adelaide and the regions along the route.
The Midland Highway is one of Tasmania's major inter-city highways, running for 176 kilometres (109 mi) between Hobart and Launceston. It is part of the AusLink National Network and is a vital link for road freight to transport goods to and from the two cities. It represents a major north–south transportation corridor in Tasmania and has the route 1 designation as part of the National Highway. The highway consists of various traffic lane arrangements, the most common being two lanes – one in each direction, with overtaking options and at-grade intersections. At both the Launceston and Hobart sections of the highway there are small portions of grade-separated dual carriageway.
A dual carriageway (BrE) or a divided highway (AmE) is a class of highway with carriageways for traffic travelling in opposite directions separated by a central reservation (BrE) or median (AmE). Roads with two or more carriageways which are designed to higher standards with controlled access are generally classed as motorways, freeways, etc., rather than dual carriageways.
Southern Expressway is an 18.5 km (11.5 mi) freeway through the southern suburbs of Adelaide, South Australia. It is the southern part of the North–South Corridor which extends the full length of Adelaide and is being built to urban freeway standard. It is designated part of route M2.
The Pacific Motorway is a motorway in Australia between Brisbane, Queensland, and Brunswick Heads, New South Wales, through the New South Wales–Queensland border at Tweed Heads.
Main North Road is the major north-south arterial route through the suburbs north of the Adelaide City Centre in the city of Adelaide, South Australia, and linking to Gawler on Adelaide's outer north-eastern fringes.
Port Wakefield is a town at the mouth of the River Wakefield, at the head of the Gulf St Vincent in South Australia. It was the first government town to be established north of the state capital, Adelaide. Port Wakefield is situated 98.7 kilometres from the Adelaide city centre on the Port Wakefield Highway section of the A1 National Highway.
South Road and its southern section as Main South Road outside of Adelaide is a major north–south conduit connecting Adelaide and the Fleurieu Peninsula, in South Australia. It is one of Adelaide's most important arterial and bypass roads. As South Road, it is designated part of route A2 within suburban Adelaide. As Main South Road, it is designated part of routes A13 and B23.
Port River Expressway is a 5.7-kilometre (3.5 mi) freeway-grade road. The expressway links Port Adelaide and the LeFevre Peninsula across the north-western suburbs of Adelaide to major interstate routes via North-South Motorway.
Northern Expressway, also known as the Fatchen Northern Expressway, is a 21 kilometre long controlled-access highway in Adelaide, South Australia. Since March 2020, the North–South Motorway continues west of Port Wakefield Highway and intersects the Port River Expressway to reach the harbour at Port Adelaide. These are the northernmost two parts of the North–South Corridor.
Salisbury Highway is a 15 kilometre major connecting road in the northern suburbs of the Adelaide metropolitan area. It is designated part of route A9.
Gawler Bypass is a major north–south route in the outer northern suburbs of the city of Adelaide, South Australia, connecting Main North Road to the Sturt Highway, bypassing Gawler. The route was built in 1963 in an attempt to redirect traffic on the national highway out of Gawler town centre. It has been upgraded and realigned several times since then.
The North–South Motorway is a partially complete motorway traversing the inner western suburbs of Adelaide, from Waterloo Corner in the north to Bedford Park in the south. Progressively constructed in stages since 2010, once complete it will replace the adjacent South Road as Adelaide's main north–south roadway. It will form the central section of the North–South Corridor, being flanked north and south by the Northern Expressway and Southern Expressway, respectively. It is designated part of route M2.
The North–South Corridor is a series of component motorways travelling through Adelaide, South Australia that will eventually form a continuous link from Old Noarlunga in the outer southern metropolitan Adelaide suburbs through to Gawler in northern metropolitan Adelaide, comprising a distance of 78km. Under South Australia's road route system, the corridor is signed as route M2.
Augusta Highway is the part of Australia's ring route located in South Australia between Port Wakefield and Port Augusta.
Copper Coast Highway is a highway in South Australia which branches off from the Augusta and Port Wakefield Highways 2 km north of Port Wakefield, and heads northwest across the top of Yorke Peninsula to Kadina, ending at the Spencer Gulf town of Wallaroo.
The Joy Baluch AM Bridge is a bridge across Spencer Gulf between Port Augusta and Port Augusta West in South Australia. It carries Highway 1 and is a key road link on both east–west and north–south road routes in Australia. The western end leads to Eyre Peninsula, the Eyre Highway and the Stuart Highway. The eastern end leads to the Augusta Highway towards Adelaide, Victoria and New South Wales.
A1 (2017–present)
Main North Road 
