Eyre Highway is a 1,664-kilometre (1,034 mi) highway linking Western Australia and South Australia via the Nullarbor Plain. Signed as National Highways 1 and A1, it forms part of Highway 1 and the Australian National Highway network linking Perth and Adelaide. It was named after explorer Edward John Eyre, who was the first European to cross the Nullarbor by land, in 1840–1841. Eyre Highway runs from Norseman in Western Australia, past Eucla, to the state border. Continuing to the South Australian town of Ceduna, it crosses the top of the Eyre Peninsula before reaching Port Augusta.
Lincoln Highway is a highway in South Australia which links the cities of Port Augusta and Port Lincoln located on the east coast of Eyre Peninsula over a distance of 315 kilometres. Lincoln Highway - along with Flinders Highway - presents an alternative but somewhat longer coastal route between Ceduna and Port Augusta, compared to the more direct route along Eyre Highway. It is designated route B100.
Flinders Highway connects the South Australian towns of Ceduna and Port Lincoln, a distance of 396 kilometres (246 mi) Flinders Highway – along with Lincoln Highway – presents an alternative but somewhat longer coastal route between Ceduna and Port Augusta, compared to the more direct route along Eyre Highway. It is designated route B100.
Port Wakefield Highway is an important South Australian highway, connecting Adelaide to the Yorke Peninsula, Port Augusta, northern and western South Australia, the Northern Territory and Western Australia. It is designated National Highway A1 and a part of the National Highway. It is named after Port Wakefield, the first government town north of Adelaide.
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.
Grand Junction Road is the longest east–west thoroughfare in the Adelaide metropolitan area, traversing through Adelaide's northern suburbs approximately 8 kilometres north of the Adelaide city centre.
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.
Victor Harbor Road is a major road in South Australia that runs south from Main South Road at Old Noarlunga on the southern fringes of suburban Adelaide to Victor Harbor on the Fleurieu Peninsula. It is designated part of route A13.
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.
Marion Road is a north–south arterial road through the western suburbs of Adelaide, South Australia, named after its traversal through the suburb of Marion and the local government area of City of Marion. It is designated part of route A14.
Goyder Highway (B64) is a west–east link through the Mid North region of South Australia connecting Spencer Gulf to the Riverland. It is part of the most direct road route from Port Augusta to much of Victoria and southern New South Wales.
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.
Yorke Highway is the main road from Adelaide to the southern parts of the Yorke Peninsula in South Australia. It runs from the northeast to the southwest of the peninsula. It branches off Copper Coast Highway after rounding the top of Gulf St Vincent, runs down the coast to Ardrossan then inland through Maitland to the Spencer Gulf coast at Hardwicke Bay then through Warooka to the south coast at Marion Bay and Stenhouse Bay on Investigator Strait.
St Vincent Highway is a major road on the southern part of Yorke Peninsula in South Australia. It diverges from Yorke Highway to continue south along the coast of Gulf St Vincent near Pine Point. It passes inland of Port Vincent, Stansbury, Wool Bay and Port Giles then passes through Coobowie and Edithburgh. From here, the St Vincent Highway turns northwest to Yorketown and west to Warooka where it rejoins Yorke Highway.
Yorkeys Crossing is a ford in the Australian state of South Australia located at the head of Spencer Gulf in the gazetted locality of Emeroo about 4 nautical miles north of Port Augusta. As of 2014, it is the site of an unsealed road that serves as a by-pass route around the head of the gulf for 'over dimensional vehicles', which are not permitted to cross the gulf using the Joy Baluch AM Bridge. It is also near the location of the crossing for the Kalgoorlie to Port Augusta Railway built after 1911. It is considered to be the most north easterly part of Eyre Peninsula and is popular with railway enthusiasts.
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)
National Highway A1 
