Main North Road

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(Redirected from Horrocks Highway)

Main North Road

Horrocks Highway

Looking south at Main North Road's southern (city) end.
Main North Road is located in South Australia
North end
North end
South end
South end
General information
Length307 km (191 mi)[1]
Route number(s)
  • B56 (1998–present)
  • B82 (1998–present)
    (Wilmington–Gawler Belt)
  • B19 (1998–present)
    (Gawler–Evanston South)
  • A20 (2017–present)
    (Evanston South–Gepps Cross)
  • A1 (2017–present)
    (Gepps Cross–North Adelaide)
route number
  • National Route 56 (1955–1998)
    (Stirling North–Wilmington)
  • National Route 83 (1955–1998)
    (Just north of Clare–Giles Corner)
  • National Route 32 (1955–1998)
    (Giles Corner–Gawler)
  • A52 (2010–2017)
  • National Highway A20 (1998–2010)
  • National Highway 20 (1992–1998)
  • National Route 20 (1955–1992)
    (Gawler–Gepps Cross)
  • National Highway A1 (1998–2017)
  • National Highway 1 (1974–1998)
  • National Route 1 (1955–1974)
    (Gepps Cross–North Adelaide)
Major junctions
North end Augusta Highway
Winninowie, South Australia
South endProspect Road
O'Connell Street

North Adelaide
RegionYorke and Mid North, Barossa Light and Lower North, Northern Adelaide, Eastern Adelaide[2]
Major suburbsWilmington, Gladstone, Clare, Giles Corner, Gawler, Elizabeth, Gepps Cross, Medindie

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.[3] It continues north through the settled areas of South Australia and is a total of 307 kilometres (191 mi) long, from North Adelaide to 21 kilometres (13 mi) out of Port Augusta.[4]

It follows the route established in the early years of the colony by explorer John Horrocks and was a major route for farmers and graziers to reach the capital, passing through rich farmland and the Clare Valley wine region. In 2011, the section of road between Gawler and Wilmington in SA's mid-north was renamed the Horrocks Highway.[5]


Main North Road branches from the northern end of O'Connell Street (North Adelaide) and passes through the Adelaide Parklands and the suburbs of Thorngate, Medindie, Medindie Gardens, Nailsworth, Prospect, Sefton Park, Blair Athol and Enfield before reaching the major intersection at Gepps Cross. Here the road forks, with the Port Wakefield Road (A1 - National Highway 1) continuing to the north, and the Main North Road turning northeast and continuing as route A20.

It continues through the outer northern suburbs, passing Mawson Lakes and Salisbury, crossing the Little Para River and passing Elizabeth and Smithfield before entering Gawler. In Gawler, it crosses the South Para and North Para Rivers, and the Barossa Valley Way branches to the east between them. Just north of Gawler, it passes under the Sturt Highway which heads east to the Barossa Valley, Riverland, northern Victoria and New South Wales.

Horrocks Highway[edit]

This is where the name Horrocks Highway takes over from the historic name of Main North Road. The environment changes from urban to undulating land, mostly cleared for grain cropping. Several of the towns have grain storage bunkers or silos. It crosses the Light River then crosses and follows the Gilbert River to where the Barrier Highway branches northeast towards Riverton and Burra.

Over the next ridge, it crosses the Wakefield River and enters the southern end of the Clare Valley. The dominant scenery changes from grain crops to grapevines from Auburn to Clare. It returns to grain fields again north of the Hutt River as it passes through the Southern Flinders Ranges. It crosses the Broughton River near Yacka and on to Wilmington at the eastern side of Horrocks Pass. As the Horrocks Highway is in the valley between the southern Flinders Ranges and northern Mount Lofty Ranges, it is in the relatively wetter climate south of Goyder's Line.

Main North Road from Wilmington to Gawler Belt was renamed to Horrocks Highway in 2011 to honour John Horrocks, an early explorer and pioneer in the region.[5] While Main North Road turns west in Wilmington through Horrocks Pass to join the Augusta Highway as route B56, Horrocks Highway continues north beyond Wilmington as route B82 to Quorn.[6]

Commuter route[edit]

In the metropolitan area, Main North Road is a major commuter route to the central business district in the Adelaide city centre.

The portion of Main North Road between the city centre and Mawson Lakes is a 15-minute public transport 'Go Zone', with the maximum wait for a bus being 15 minutes during peak times (7:30 am – 6:30 pm weekdays) and 30 minutes on weekends and evenings.[7] Bus routes via Main North Road generally begin with the prefix "22x". The bus service is provided by SouthLink for Adelaide Metro.

Route numbers[edit]

From north to south, the route numbers used along the road are:

In late 2010 when the Northern Expressway was completed, National Highway A20 was diverted to the new road as National Highway M20. Main North Road and the southern section of the Gawler Bypass Road were then designated as route A52. In late 2016, the Northern Expressway was designated M2, and the designation of Main North Road was reverted back as route A20 to Gepps Cross.[8]

Major intersections[edit]

Port AugustaWinninowie0.00.0 Augusta Highway (A1) – Port Augusta, SnowtownNorthern terminus of road and route B56
0.20.12Adelaide–Port Augusta railway line
Mount RemarkableWilmington20.712.9 Horrocks Highway (B82 north) – QuornConcurrency of routes B56 and B82
23.314.5 Willowie Road (B56 east) – Orroroo, Peterborough
Melrose50.031.1White Wells Road – Booleroo Centre
Murray Town59.436.9Nukunu Yarta Way – Booleroo Centre
62.438.8Germein Gorge Road – Port Germein
Northern AreasLaura90.055.9Possum Park Road – Crystal Brook
Gladstone100.062.1 Wilkins Highway (B79) – Crystal Brook, Jamestown, Hallett
101.663.1Crystal Brook–Broken Hill railway line
Gulnare121.975.7 Goyder Highway (B64 west) – Crystal BrookConcurrency of routes B64 and B82
124.077.1 Goyder Highway (B64 east) – Spalding, Burra, Renmark
WakefieldBrinkworth150.093.2Condowie Plain Road – Snowtown
Clare and Gilbert ValleysBungaree159.899.3Bungaree Road (north) – Bungaree
162.6101.0 RM Williams Way (B80) – Spalding, Jamestown
168.3104.6Bungaree Road (south) – Bungaree
Clare174.8108.6Blyth Road – Blyth, Lochiel
175.7109.2Farrell Flat Road – Hanson, Burra
Auburn200.0124.3 Balaklava Road (B84 west) – Balaklava, Port WakefieldConcurrency of routes B82 and B84
200.2124.4 Saddleworth Road (B84 east) – Saddleworth
Wakefield River204.9127.3Bridge over the river (bridge name unknown)
Clare and Gilbert ValleysGiles Corner224.5139.5 Barrier Highway (A32) – Burra, Hallett, Broken HillNorthbound entrance to and southbound exit from Barrier Highway only
Tarlee230.0142.9Tarlee Road – Kapunda
Light River239.8149.0Linwood Bridge
LightTemplers253.1157.3Owen Road (northwest) – Hamley Bridge, Owen, Balaklava
Templers Road (east) – Freeling
Gawler Belt264.1164.1 Thiele Highway (B81) – Freeling, Kapunda, Eudunda, Morgan
264.7164.5 Sturt Highway (A20) – Adelaide, Nuriootpa, RenmarkSouthern terminus of route B82, unallocated south
North Para River267.0165.9Bridge over the river (bridge name unknown)
GawlerGawler267.6166.3Barossa Valley railway line
267.9166.5 Barossa Valley Way (B19) – Lyndoch, Tanunda, NuriootpaRoute B19 continues south (as Adelaide Road)
South Para River268.7167.0Bridge over the river (bridge name unknown)
GawlerEvanston South268.8167.0 Twelfth Street (B77) – Gawler River, Two Wells
Evanston-Evanston Park-Evanston South tripoint272.4169.3 Gawler Bypass (A20 north) – Nuriootpa, RenmarkNortheast-bound entrance from and southwest-bound exit to Main North Road only
Western terminus of route B19
Route A20 continues southwest along Main North Road
PlayfordElizabeth Vale-Hillbank boundary286.6178.1 John Rice Avenue (A9) – Salisbury, Port Adelaide
Little Para River287.5178.6Bridge over the river (bridge name unknown)
SalisburySalisbury Park-Salisbury Plain-Salisbury Heights tripoint289.1179.6 The Grove Way (A11 southeast) – Golden Grove
Saints Road (northwest) – Salisbury Plain
Salisbury South-Salisbury East-Parafield-Para Hills West quadripoint292.6181.8 McIntyre Road (A18 southeast) – Modbury
Kings Road (A18 northwest) – Salisbury Downs
Mawson Lakes-Pooraka boundary297.6184.9Montague Road – Cavan, Modbury
Port Adelaide EnfieldGepps Cross300.0186.4 Port Wakefield Road (A1 north) – Waterloo Corner, Port Wakefield
Grand Junction Road (A16 east, west) – Port Adelaide, Northfield
Southern terminus of route A20
Route A1 continues south along Main North Road
Prospect-Port Adelaide Enfield boundaryProspect-Enfield-Sefton Park tripoint302.9188.2Regency Road – Kilkenny, Greenacres
Prospect-Walkerville-Adelaide tripointThorngate-Medindie-North Adelaide tripoint305.9190.1 Fitzroy Terrace (R1 west) – Hindmarsh, Thebarton
Robe Terrace (R1 east) – Kent Town, Dulwich
Route A1 north from here, unallocated south
AdelaideNorth Adelaide306.3190.3O'Connell Street (south) – North Adelaide, Adelaide CBD
Prospect Road (north) – Prospect
Barton Terrace West (west) – North Adelaide
Southern terminus of road
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

See also[edit]


  1. ^ a b c Google (20 June 2022). "Main North Road" (Map). Google Maps. Google. Retrieved 20 June 2022.
  2. ^ "Location SA Map viewer with regional layers". Government of South Australia. Retrieved 16 June 2022.
  3. ^ 2003 Adelaide Street Directory, 41st Edition. UBD (A Division of Universal Press Pty Ltd). 2003. ISBN 0-7319-1441-4.
  4. ^ a b "Location SA Map viewer with suburb layers". Government of South Australia. Retrieved 16 June 2022.
  5. ^ a b "Highways renamed" (PDF). The Flinders News. Rural Press. 31 August 2011. Archived from the original (PDF) on 4 September 2014. Retrieved 4 September 2014.
  6. ^ "Highway One gets a change of name". Plains Producer. 19 August 2011. Retrieved 4 September 2014.
  7. ^ "FAQs: What is a Go Zone?". Retrieved 24 March 2015.
  8. ^ "Road Route Numbers (Trail Blazer)". Data SA. Government of South Australia. 8 November 2016. Retrieved 16 October 2017.
  9. ^ "Location SA Map viewer with LGA layers". Government of South Australia. Retrieved 16 June 2022.