Statistics:

Length:
368 km
Termini:
Northern: Princes Hwy (NH1) and Dukes Hwy (NH8), Tailem Bend
Southern: SA-VIC border, Glenburnie
Miscellaneous:
Continued as Princes Hwy (A1) in Victoria
Suburbs, Towns & Localities Along Route:
Mount Gambier, Millicent, Kingston SE, Meningie and Tailem Bend

Route Numbering:

Current: A1 B1
Former: 1

General Information:

The Highway 1 alignment runs right around Australia.

The Princes Highway segment links Adelaide, Melbourne and Sydney. The highway was first proclaimed from Sydney to Melbourne in the 1920s, it was later extended through western Victoria and eventually to Adelaide.

History:

1955: The route from the Vic / SA Border to Tailem Bend was fully sealed, National Route 1 shield implemented.
1998: NR1 replaced by B1 with introduction of alphanumeric route numbering.
Post-1998 photos presented below are remnants, missed during alphanumeric conversion.

VIC Border to Tailem Bend

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Supplemental Advance Directional Sign:

Supplemental AD sign at Mount Gambier approaching Penola Rd, December 2001.

Image © Jamie Scuglia

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Advance Directional Sign:

AD sign at Millicent approaching Wyrie Rd and Williams Rd, October 2011.

Image © Peter Renshaw

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Black Supplemental Advance Directional Sign:

Black AD sign approaching Ridge Tce, Millicent, December 2001.

Image © Jamie Scuglia

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Reassurance Directional Sign:

Distance sign at Millicent, October 2011.

Image © Peter Renshaw

Tailem Bend to VIC Border

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Intersection Directional Sign:

ID sign on East Tce, Callington, at the junction with Bremer Rd and Kiernan St, December 2007.

Image © Michael Greenslade