Gawler Bypass

South Australia
Coordinates
General information
TypeFreeway
Length5.0 km (3.1 mi)[1]
Route number(s) A20 (2017–present)
Former
route number
  • A52 (2010–2017)
    (Evanston–Reid)
  • National Highway A20 (1998–2010)
  • National Highway 20 (1992–1998)
  • National Route 20 (1955–1992)
    Entire route
Major junctions
North end Sturt Highway
Hewett, Adelaide
 
South end Main North Road
Evanston, Adelaide
Location(s)
RegionBarossa Light and Lower North[2]
Major suburbsEvanston, Gawler West, Willaston
Highway system

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.

History

The first Gawler bypass was planned in the 1950s.[3] It was first built as a single two-lane carriageway around the town in 1963, with at-grade intersections, and carried 3,000 vehicles per day.[4] It ended at a tee-junction with Main North Road at the southern end, and followed an alignment that included what is now the southbound on-ramp and Brereton Road, Jack Cooper Drive over the Winckel Bridge,[5] and Paternoster Drive to the railway bridge.

The road was rebuilt in the mid-1980s as a dual carriageway, with grade-separated intersections at the southern end in a new alignment, with new bridges over the Gawler River. At the time of approval, the bypass was carrying 7,000 vehicles per day. 300 collisions had been recorded between 1977 and 1982. It began construction at the end of 1985.[4] Its total cost was $18 million, of which $13 million came from Federal funding.[4]

In 2010, construction of the Northern Expressway realigned the northbound carriageway as part of creating a grade-separated intersection, with smooth traffic flow between the northern section of the bypass and both the Northern Expressway and the southern part of the bypass.[6] As both roads lead broadly south, there is no provision to turn directly from one to the other. Road definitions also changed: the definition of Sturt Highway was lengthened a short distance west along the bypass to meet the expressway, resulting in a shortening of the bypass by a distance of 3.5km.

It was designated National Route 20, updated to National Highway 20 in 1992, and to National Highway A20 in 1998. This was changed to route A52, south of the intersection with Northern Expressway when it opened in 2010. From late 2016, the entire length was re-designated route A20. The Northern Expressway was re-designated route M2, instead of route M20.[7]

Exits and interchanges

LGA[8]Location[1][9]km[1]miDestinationsNotes
LightWard Belt–Reid–Buchfelde tripoint0.00.0 Sturt Highway (A20) – Nurioopta, Renmark, Mildura, Wagga WaggaNorthern terminus of bypass, route A20 continues north along Sturt Highway
Northern Expressway (M2) – Waterloo Corner, Port Adelaide, AdelaideNorthbound exit and southbound entrance only
Reid–Buchfelde boundary1.50.93 Two Wells Road (B77) – Gawler West, Two WellsNorthbound entry and southbound exit only
Gawler River2.21.4Bridge over the river (bridge name unknown)
GawlerEvanston–Hillier boundary2.51.6Jack Cooper Drive – Evanston, Evanston GardensSouthbound entry and northbound exit only
Evanston–Evanston Gardens boundary3.72.3Gawler railway line
Evanston–Evanston Gardens–Evanston Park–Evanston South quadripoint5.03.1 Adelaide Road (B19) – Evanston, GawlerNorth-eastbound entry and south–western exit only
Main North Road (A20) – Elizabeth, Gepps Cross, North AdelaideSouthern terminus of bypass, route A20 continues southwest along Main North Road
Route diagram
Sturt Highway
Sturt Highway
Northern Expressway Grade Separated Intersection
Two Wells Road Give Way
Gawler River
Gawler River
 RoundaboutRyde Street
Jack Cooper Drive Give Way
Gawler railway line
Gawler railway line
Dawson Road
Dawson Road
Grade Separated Intersection Adelaide Road
Main North Road
Main North Road

See also

icon Australian Roads portal

References

  1. 1 2 3 Google (22 June 2022). "Gawler Bypass" (Map). Google Maps. Google. Retrieved 22 June 2022.
  2. ↑ "Location SA Map viewer with regional layers". Government of South Australia. Retrieved 16 June 2022.
  3. ↑ "Main North Road By-Pass Altered". The Bunyip. No. 5251. South Australia. 23 February 1951. p. 3. Retrieved 28 June 2016 – via National Library of Australia.
  4. 1 2 3 Peter Morris, Minister for Transport Australia (9 May 1984). "$18 Million Gawler Bypass gets Go Ahead". Media Release. 71/84. Retrieved 28 June 2016.
  5. ↑ "NEW PLAN OF MAIN NORTH ROAD". The Bunyip. No. 5237. South Australia. 3 November 1950. p. 1. Retrieved 28 June 2016 – via National Library of Australia.
  6. ↑ "Sturt Highway Upgrade". Department of Planning, Transport and Infrastructure. Archived from the original on 24 October 2009. Retrieved 8 February 2017.
  7. ↑ "Road Route Numbers (Trail Blazer)". Data SA. Government of South Australia. 8 November 2016. Retrieved 16 October 2017.
  8. ↑ "Location SA Map viewer with LGA layers". Government of South Australia. Retrieved 16 June 2022.
  9. ↑ "Location SA Map viewer with suburb layers". Government of South Australia. Retrieved 16 June 2022.
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