Augusta Highway

Augusta Highway South Australia
Sign at the northern end of the Highway
North end South end
Coordinates	32°28′49″S 137°45′10″E / 32.480286°S 137.752896°E / -32.480286; 137.752896 (North end) 34°09′45″S 138°09′24″E / 34.162579°S 138.156759°E / -34.162579; 138.156759 (South end)
General information
Type	Highway
Length	208.1 km (129 mi)[1]
Gazetted	2011[2]
Route number(s)	A1 (2017–present)
Former route number	National Highway A1 (2011–2017)
Major junctions
North end	Eyre Highway Port Augusta, South Australia
	Stuart Highway Flinders Ranges Way Main North Road Spencer Highway Wilkins Highway Goyder Highway Copper Coast Highway
South end	Port Wakefield Highway Port Wakefield, South Australia
Location(s)
Region	Far North, Yorke and Mid North[3]
Major settlements	Port Germein, Port Pirie, Crystal Brook, Snowtown
Highway system
Highways in Australia National Highway • Freeways in Australia Highways in South Australia

Augusta Highway is the part of Australia's ring route (Highway 1) located in South Australia between Port Wakefield and Port Augusta.

Augusta Highway starts at the intersection with Eyre and Stuart Highways in Port Augusta West, then crosses the northern section of Spencer Gulf into central Port Augusta. It continues in a southerly direction as a single-carriageway highway with occasional overtaking lanes past Port Germein, Port Pirie, Crystal Brook and through Snowtown until it eventually meets Copper Coast Highway just north of Port Wakefield, where it continues south as Port Wakefield Highway.

It was named Augusta Highway in 2011,^[2][4] and was formerly known simply as Highway One^[2] (and also as Princes Highway, despite not being continuous to Princes Highway in the southeast of the state). When a Highway Naming Committee was formed around 1999, there were proposals for the highway to become part of Eyre Highway, or named Wakefield Highway.^[5]

Following the 2018 South Australian state election, upgrades were announced for both ends of the Augusta Highway. At the northern end, the Joy Baluch AM Bridge across Spencer Gulf at Port Augusta is to be duplicated to improve safety for both local and highway traffic. At the southern end, the contract for detailed design and construction of the duplication of the highway through Port Wakefield and a grade-separated intersection with the Copper Coast Highway was let in March 2020. Both projects were contracted to the Port Wakefield to Port Augusta Alliance (a consortium of CPB Contractors, Aurecon and GHD Group),^[6][7] with the government announcing an overpass for the intersection with Copper Coast Highway in 2021.^[8] Construction on both projects commenced in late 2020, with completion expected in 2022;^[6] the overpass to Copper Coast Highway opened in December 2021, four months ahead of schedule.^[9]

As finishing works were continuing around Port Wakefield, a new project started to duplicate the highway from the Copper Coast Highway to the southern side of Lochiel.^[10]

LGA[11]	Location[1][12]	km[1]	mi	Destinations	Notes
Port Augusta	Port Augusta West	0.0	0.0	Eyre Highway (A1 west) – Kimba, Ceduna, to Western Australia	Northern terminus of Augusta Highway, route A1 continues west along Eyre Highway
				Stuart Highway (A87 north) – Pimba, Coober Pedy, to the Outback and Northern Territory
Spencer Gulf		0.8– 1.5	0.50– 0.93	Joy Baluch AM Bridge
Port Augusta	Port Augusta	1.7	1.1	Trans-Australian Railway
		3.8	2.4	Adelaide–Port Augusta railway line
	Stirling North	8.2	5.1	Flinders Ranges Way (B83) – Quorn, Hawker
	Winninowie	23.2	14.4	Horrocks Pass Road (B56) – Wilmington
Mount Remarkable	Port Germein	64.9	40.3	Port Germein Road – Port Germein
		65.5	40.7	Adelaide–Port Augusta railway line
		68.0	42.3	Germein Gorge Road – Murray Town
		68.8	42.8	Port Germain Road – Port Germein
Port Pirie	Napperby	86.9	54.0	Spencer Highway (B89) – Port Pirie, Wallaroo, Minlaton
	Bungama	90.5	56.2	Warnertown Road – Port Pirie
	Warnertown	101.2	62.9	Wilkins Highway (B79) – Laura, Gladstone
	Crystal Brook	108.6	67.5	Goyder Highway (B64) – Crystal Brook, Burra, Morgan, Renmark
		109.2	67.9	Adelaide–Port Augusta railway line
		115.3	71.6	Venning Road – Crystal Brook, Gladstone
	Merriton	120.7	75.0	Clements Road – Port Broughton
Wakefield	Snowtown	161.1	100.1	Condowie Plain Road – Brinkworth, Blyth
		163.2	101.4	Barunga Gap Road – Bute, Kadina
	Lochiel	179.3	111.4	Ninnes Road – Paskeville, Moonta
		179.6	111.6	Blyth Road – Blyth, Clare
	Port Wakefield	208.1	129.3	Copper Coast Highway (B85 west) – Kadina, Wallaroo	Trumpet Interchange
				Port Wakefield Highway (A1 south) – Adelaide	Southern terminus of Augusta Highway, route A1 continues south along Port Wakefield Highway
Route transition

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