Riddoch Highway

Riddoch Highway

South Australia
Riddoch Highway; South Australia
	The Riddoch Highway near Padthaway
	North end South end
Coordinates	36°05′09″S 140°20′33″E / 36.085721°S 140.342395°E (North end); 38°03′12″S 140°42′09″E / 38.053398°S 140.702383°E (South end);
General information
Type	Highway
Length	239 km (149 mi)
Route number(s)	A66 (1998–present); (Keith–Mount Gambier); B66 (1998–present); (Mount Gambier–Port MacDonnell);
Major junctions
North end	Dukes Highway; Keith, South Australia
	Bordertown–Naracoorte Road; Wimmera Highway; Edenhope-Penola Road; Princes Highway;
South end	Sea Parade; Port MacDonnell, South Australia
Location(s)
Region	Limestone Coast
Major settlements	Padthaway, Naracoorte, Coonawarra, Penola, Tarpeena, Mount Gambier
Highway system
	Highways in Australia; National Highway • Freeways in Australia; Highways in South Australia; ; ;

Riddoch Highway is a rural highway in south-eastern South Australia, designated as route A66 between Keith and Mount Gambier, with the remainder between Mount Gambier and Port MacDonnell designated as route B66. It is named after John Riddoch, the first white settler landholder and vigneron in Coonawarra.

Route

The Riddoch Highway branches from the Dukes Highway at Keith and travels south through Padthaway, Naracoorte, Penola, Nangwarry, Tarpeena, and Mount Gambier to Port MacDonnell and nearby Cape Northumberland.^[3]It passes through grazing and cereal-growing land, horticultural and vineyards (within the following wine regions – Padthaway, Wrattonbully, Coonawarra and Mount Gambier), and plantation timber, predominantly pinus radiata.^[4]

Safety

The Royal Automobile Association of South Australia has rated the highway at 5/10.^[5]

Major intersections

LGA^[6]	Location^[1]^[3]	km^[1]	mi	Destinations	Notes
Tatiara	Keith	0.0	0.0	Dukes Highway (A8) – Adelaide, Tailem Bend, Bordertown, Melbourne	Northern terminus of highway and route A66
Naracoorte Lucindale	The Gap	83.5	51.9	Bordertown–Naracoorte Road (B57) – Bordertown
Naracoorte Lucindale	Naracoorte	109	68	Wimmera Highway (C240) – Hynam, Edenhope, Horsham, Marong	Continues into VIC as route B240 along Wimmera Highway eventually to Marong
Wattle Range	Glenroy	141	88	Edenhope Road (C212) – Edenhope	Continues into VIC as route C212 along Edenhope-Penola Road eventually to Edenhope
Wattle Range	Penola	159	99	Casterton Road (C198) – Casterton	Continues into VIC as route C198 along Casterton-Penola Road eventually to Casterton
Mount Gambier	Mount Gambier	210	130	Princes Highway (A1 east, B1 west) – Millicent, Kingston SE, Portland	Route transition: A66 north, B66 south
Grant	Port MacDonnell	238	148	Sea Parade – Cape Northumberland	Southern terminus of highway and route B66
Route transition

References

^ ^a ^b ^c "Riddoch Highway" (Map). Google Maps. Retrieved 6 June 2022.
^ "Location SA Map viewer with regional layers". Government of South Australia. Retrieved 16 June 2022.
^ ^a ^b "Location SA Map viewer with suburb layers". Government of South Australia. Retrieved 16 June 2022.
^ Longbottom, Mardi; Maschmedt, David and Pichler, Markus (2011), Unearthing viticulture in the Limestone Coast (PDF), p. 12, ISBN 978-0-646-56744-0, archived from the original (PDF) on 6 November 2014, retrieved 5 November 2014{{citation}}: CS1 maint: multiple names: authors list (link)
^ "roadwatch report – riddoch highway" (PDF). RAA. September 2006. Retrieved 16 October 2007.
^ "Location SA Map viewer with LGA layers". Government of South Australia. Retrieved 16 June 2022.

External links

Riddoch Highway webpage on Ozroads website

[gmaps-1] "Riddoch Highway" (Map). Google Maps. Retrieved 6 June 2022.

[SARegions-2] "Location SA Map viewer with regional layers". Government of South Australia. Retrieved 16 June 2022.

[SAlocs-3] "Location SA Map viewer with suburb layers". Government of South Australia. Retrieved 16 June 2022.

[4] Longbottom, Mardi; Maschmedt, David and Pichler, Markus (2011), Unearthing viticulture in the Limestone Coast (PDF), p. 12, ISBN 978-0-646-56744-0, archived from the original (PDF) on 6 November 2014, retrieved 5 November 2014{{citation}}: CS1 maint: multiple names: authors list (link)

[rating-5] "roadwatch report – riddoch highway" (PDF). RAA. September 2006. Retrieved 16 October 2007.

[SALGAs-6] "Location SA Map viewer with LGA layers". Government of South Australia. Retrieved 16 June 2022.

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v t e Road infrastructure in South Australia
Expressways	South Eastern Freeway Port River Expressway Northern Expressway North–South Motorway (incomplete, under construction) Southern Expressway
Interstate highways	Barrier Highway Dukes Highway Eyre Highway Mallee Highway Princes Highway Stuart Highway Sturt Highway
State highways	Augusta Highway Gawler Bypass Horrocks Highway Main South Road Port Wakefield Highway Riddoch Highway Victor Harbor Road
Arterial roads	Adelaide–Mannum Road Alexandrina Road Barossa Valley Way Birdseye Highway Browns Well Highway Cameron Highway Copper Coast Highway Flinders Highway Flinders Ranges Way Glenelg Highway Gorge Road Goyder Highway Horrocks Highway Karoonda Highway Lincoln Highway Ngarkat Highway Olympic Dam Highway Onkaparinga Valley Road Playford Highway RM Williams Way Southern Ports Highway Spencer Highway St Vincent Highway Stott Highway Strathalbyn Road The Outback Highway Thiele Highway Tod Highway Wellington Road Wilkins Highway Wilmington–Ucolta Road Wimmera Highway Yorke Highway
Outback tracks	Anne Beadell Highway Birdsville Track Colson Track Gunbarrel Highway Maralinga to Emu Road Mount Davies Road Oodnadatta Track Strzelecki Track Vokes Hill Corner to Cook Road
Transport in South Australia; List of road routes in South Australia

Route

Safety

Major intersections

See also

References

External links