List of road routes in South Australia
Roads routes in South Australia comprise both National Highways and state routes. All routes are alphanumeric, with the first letter denoting the standard or function of the road.
Since 1955 South Australia had major rural roads numbered as part of national routes and Highways. In 1998/1999 South Australia introduced "Trailblazers" with A, B and M route numbers in the Metropolitan area and tourist areas of Victor Harbour and the Barossa Valley. This system was extended to cover country areas starting in 1999/2000
National Highways
| Route | Component roads | From | Via | To | Length | Notes |
National Highway A1 | Mawson Lakes | Port Wakefield, Snowtown, Port Augusta, Kimba, Kyancutta, Ceduna | SA/WA Border | Part of Highway 1. | ||
National Highway A1 | Princes Highway | Murray Bridge | Swanport Bridge | Tailem Bend | ||
National Highway M1 | South Eastern Freeway | Glen Osmond | Murray Bridge | |||
National Highway A8 | Dukes Highway | Tailem Bend | Coonalpyn, Tintinara, Keith, Bordertown | SA/VIC Border | ||
National Highway A16 | Grand Junction Road | Port Adelaide | Hope Valley | |||
National Highway A17 | Glen Osmond | Northfield | Urban road with no grade separations | |||
National Highway M20 | Virginia | Munno Para West, Angle Vale | Gawler | Now renamed as the | ||
National Highway A20 | Gawler | SA/VIC Border | formerly National Highway 20 | |||
National Highway A87 | Stuart Highway | Port Augusta | Pimba, Coober Pedy | SA/NT Border |
Other routes
Route numbers| Route | Component roads | From | Via | To | Length | Notes |
R1 | Formerly designated A21 on a different route in the southwest, listed clockwise from Port Road | |||||
A1 | Glen Osmond | Adelaide | Mawson Lakes | discontinuous across the Adelaide city centre | ||
B1 | Princes Highway | Tailem Bend | Meningie, Kingston SE, Millicent | Mount Gambier | ||
M2 | Southern Expressway | Bedford Park | Noarlunga | |||
M2 | North–South Motorway | Wingfield | Regency Park | 4.8 km | Under construction, built in sections. | |
M2 | Northern Expressway | Waterloo Corner | Gawler | |||
A2 | South Road | Regency Park | Darlington | Surface road adjacent to North–South Motorway. | ||
A3 | Cross Road | Glen Osmond | Plympton | |||
A5 | Anzac Highway | Adelaide | Glenelg | |||
A6 | Sir Donald Bradman Drive | Adelaide | West Beach | Formerly Burbridge Rd | ||
A7 | Port Road, Commercial Road | Hindmarsh | Port Adelaide | |||
A9 | Hillbank | Port Adelaide | ||||
A10 | ||||||
B10 | Torrens Valley Scenic Drive | Nuriootpa | Angaston, Mt Pleasant, Birdwood | Tea Tree Gully | ||
A11 | Adelaide city centre | Houghton | ||||
B12 | Mallee Highway | Tailem Bend | Ouyen, Victoria | |||
A13 | Darlington | Victor Harbor | ||||
A14 | Beverley | Darlington | ||||
A15 | Alberton | Port Noarlunga | ||||
A16 | Modbury | Gepps Cross | Outer Harbor | |||
A17 | Glen Osmond | Gepps Cross | ||||
A18 | Paralowie | Modbury | ||||
B19 | Barossa Valley Way | Gawler | Nuriootpa | |||
A20 | Main North Road | North Adelaide | Gawler | Originally only north of Gepps Cross, then A52 for a few years, changed to A20 in 2017 | ||
| Former A21 | Former designation replaced by City Ring Route, listed clockwise from the north-west corner of Adelaide city centre | |||||
A22 | North Adelaide | Dry Creek | ||||
B23 | Old Noarlunga | Cape Borda | ||||
B26 | Greenhill Road | Fullarton Road, Eastwood | Uraidla | Balhannah | Since 2019 | |
B27 | Kent Town | Mount Torrens | Since 2019 | |||
B28 | Glen Osmond Road, Parkside | Belair, Crafers | Summertown | Since 2019 | ||
B31 | Campbelltown | Chain of Ponds, Williamstown | Lyndoch | |||
A32 | Main North Road | Stirling North | Gawler | Runs from Stirling North to Wilmington, and from Giles Corner to Gawler | ||
B33 | Stirling | Aldgate | Strathalbyn | Mt Barker Road from Stirling to Aldgate, then Strathalbyn Road to Strathalbyn | ||
B34 | Williamstown | Birdwood, Willunga | Myponga | |||
B35 | Mount Crawford | Mount Pleasant | Murray Bridge | |||
B36 | Palmer | Mannum | Murray Bridge | |||
B37 | Mount Barker | Strathalbyn, Goolwa, Port Elliot, Victor Harbor | Delamere | |||
B45 | ||||||
| Formerly A52 | Former designation for Main North Road | Gawler | Elizabeth, Salisbury | Gepps Cross | ' | Formerly National Highway 20, now A20 since 2017 |
B55 | Murray Bridge | Karoonda, Loxton | Berri | |||
B56 | Ucolta | Winninowie | ||||
B57 | Bordertown | Pinnaroo, Paruna | Loxton | |||
B64 | Goyder Highway | Monash | Burra | Crystal Brook | ||
A66/B66 | Riddoch Highway | Keith | , | Port MacDonnell | A66 Keith-Mt Gambier, B66 to Port MacDonnell | |
B78 | Wilkins Highway | Jamestown | Hallett | |||
B79 | 17km south of Port Pirie | |||||
B80 | RM Williams Way | Clare | Hawker | |||
B81 | Thiele Highway | Gawler Belt | Kapunda, Eudunda | Morgan | ||
B82 | Gawler | Clare, Gladstone, Melrose, Wilmington | Quorn | |||
B83 | Stirling North | Quorn, Hawker, Leigh Creek | Lyndhurst | Much of this route still is designated | ||
B84 | Port Wakefield | Eudunda | ||||
B85 | Copper Coast Highway | Port Wakefield | Kulpara, Paskeville, Kadina | Wallaroo | ||
B86 | Yorke Highway | NW Port Wakefield | Ardrossan, Minlaton, Marion Bay | Stenhouse Bay | ||
B88 | St Vincent Highway | south of Ardrossan | Warooka | |||
B89 | Spencer Highway | Port Pirie | Kadina, Moonta, Maitland | Minlaton | Note: Spencer Highway and route B89 differ between Alford and Moonta: B89 passes through Kadina, Spencer Highway through Wallaroo. | |
B90 | Tod Highway | Kyancutta | Lock | West of Pt Lincoln | ||
B91 | Birdseye Highway | Cowell | Lock | Elliston | ||
B97 | Pimba | Woomera, Roxby Downs | Olympic Dam | |||
B100 | Lincoln Highway | Port Augusta | Whyalla | Port Lincoln | ||
B100 | Flinders Highway | Port Lincoln | Streaky Bay | Ceduna | ||
B101 | Southern Ports Highway | Millicent | Kingston SE | |||
C192 | Punt Rd | Mount Gambier | SA/VIC Border | |||
B201 | Barmera | Berri | Renmark | |||
C240 | Wimmera Highway | Continuation of VIC B240 |