Length:

153 km

Termini:

Northern: Main South Road (A13) & Victor Harbor Road (A13), Old Noarlunga

Southern: Kingscote Terrace & Esplanade, Kingscote

Suburbs, Towns & Localities Along Route:

Old Noarlunga, Seaford Rise, Aldinga, Myponga, Wattle Flat, Yankalilla, Normanville, Delamere, Cape Jervis, Penneshaw, Dudley East, American Beach, Baudin Beach, Dudley West, Browns Beach, Pelican Lagoon, Muston, Haines, Nepean Bay, Brownlow and Kingscote

Current: B23

Multiplexed with: 52

Road Authority Internal Classification: ¹

04763 (Old Noarlunga to Cape Jervis)

04880 (Cygnet River to Kingscote)

04883 (Penneshaw to Cygnet River)

General Information:

B23 is the main route from the mainland to Kangaroo Island. It is also the only numbered highway route on Kangaroo Island. The route forms part of the Fleurieu Way, a themed tourist route that traverses the Fleurieu Peninsula.

Cape Jervis, on the tip of the Fleurieu Peninsula is the point for daily car and passenger ferry services to Kangaroo Island. It's a 45 minute journey.

Tourist Drive 52, for 35 km, between Main St, Yankalilla and Cape Jervis.

June 2006: Completion of a new southbound overtaking lane south of Maslin Beach Road ²

May 2010: Upgrade works commenced at the Victor Harbor Road and Main South Road junction at Old Noarlunga. Works included installation of traffic lights including a pedestrian crossing at the Main South Road junction with Victor Harbor Road, widening South Road to three lanes each way between Main South Road and Seaford Road / Patapinda Road, introduction of additional lanes on the Victor Harbor Road and the Main South Road (south) approaches and improving the existing Main South Road / Seaford Road / Patapinda Road intersection. ³

September 2010: Completion of upgrade works at the Victor Harbor Road and Main South Road junction at Old Noarlunga. ³

2015: Playford Highway / Hog Bay Road Intersection Improvemen. Work included realignment, channelised T-junction turn lane, traffic island and tree removal. ⁴

August 2017: Work starts on upgrades along Main South Road between Old Coach Road and Malpas Road at Aldinga. Work included a new single lane roundabout at the junction of Port Road and Main South Road with a dedicated left slip lane for northbound vehicles from Port Road, U-turn facility north of Malpas Road, a three metre wide centre traffic median between Port Road and Malpas Road with central wire rope safety barrier, extension of the Main South Road left turning lane into Malpas Road, road widening and resurfacing, improved road lighting, road signage and line marking, plus removal of right turn movements in and out of Little Road at Main South Road, the addition of a shared user path crossing at Main South Road to facilitate cycling and walking between Aldinga and Willunga, pedestrian and cyclist access improvements at the roundabout, and removal of right turn movements out of Old Coach Road at Main South Road. A reduction of the speed limit was made from 100 km/h to 90 km/h between Seaford Heights and Little Road from 80 km/h to 70 km/h between Little Road and Hart Road. ⁵

April 2018: Completion of upgrades between Old Coach Rd and Malpas Rd. ⁵

Kingscote (Kangaroo Island) to Old Noarlunga

AD sign:

Advance directional sign for the Emu Bay Road junction, at Brownlow, July 2004.

Image © Darrin Smith

Advance Directional Sign:

AD sign on Emu Bay Road at Brownlow as you approach Playford Hwy (B23). July 2004.

Image © Darrin Smith

Playford Hwy / Emu Bay Rd Junction:

ID signage and fingerboard facing traffic from Emu Bay Road at Brownlow, July 2004.

Image © Darrin Smith

Distance Sign:

RD sign at Muston, near the Muston Road intersection. July 2004.

Image © Darrin Smith

Advance Directional Sign:

AD sign approaching Bessell Drive at Baudin Beach. July 2004.

Image © Darrin Smith

Reassurance Directional Sign:

Distance sign at Cape Jervis, July 2014.

Image © Michael Greenslade

Reassurance Directional Sign:

Distance sign on Main South Rd (B23) at Cape Jervis, December 2003.

Image © Michael Greenslade

Black kilometre Plate:

Old black kilometre plate at Delamere, July 2014.

Image © Michael Greenslade

Advance Directional Sign:

AD sign approaching Cole Road (B37) at Delamere, December 2003.

Image © Michael Greenslade

Reassurance Directional Sign:

Distance sign at Second Valley, July 2014.

Image © Michael Greenslade

UPDATED Advance Directional Sign:

AD sign at Normanville approaching Main Rd, December 2021. Click or tap here for a photo of this location by December 2003 from Michael Greenslade.

Image © Michael Greenslade

Advance Directional Sign:

AD sign on Main Rd at Normanville approaching Main South Rd (B23), December 2003. Note the missing route numbers.

Image © Michael Greenslade

Tourism Sign:

Attractions sign at Yankalilla, December 2003.

Image © Michael Greenslade

Black Reassurance Directional Sign:

Black distance sign at Yankalilla, December 2003.

Image © Michael Greenslade

Black Intersection Directional Sign:

Black ID sign at the corner of Main South Rd (B23) and Pages Flat Rd (B34) at Myponga, December 2003.

Image © Michael Greenslade

Old Noarlunga to Kingscote (Kangaroo Island)

Reassurance Directional Sign:

Distance sign without route number, Main South Rd (B23) at Old Noarlunga, July 2004.

Image © Michael Greenslade

Advance Directional Sign:

AD sign approaching Aldinga Beach Rd at Aldinga, July 2014.

Image © Michael Greenslade

Reassurance Directional Sign:

Distance sign at Aldinga after Aldinga Beach Rd, December 2003.

Image © Michael Greenslade

Advance Directional Sign:

Unusual AD sign on Main South Rd (B23) at Aldinga Beach approaching Hahn Rd and Cox Rd, July 2004.

Image © Michael Greenslade

Advance Directional Sign:

AD sign approaching Pages Flat Rd (B34) at Myponga, July 2014. Click or tap here for a photo of this location by Michael Greenslade, featuring black signs, from July 2004.

Image © Michael Greenslade

Advance Directional Sign:

AD sign at Normanville, approaching Main Rd, July 2014.

Image © Michael Greenslade

Main Road:

Corner of Main South Rd (B23) and Main Rd, Normanville, July 2014.

Image © Michael Greenslade

Reassurance Directional Sign:

Distance sign at Normanville, July 2014.

Image © Michael Greenslade

Reassurance Directional Sign:

Distance sign at Second Valley, July 2014.

Image © Michael Greenslade

Distance Sign:

RD sign located in the Delamere area. July 2004.

Image © Darrin Smith

Cape Jervis:

Main South Rd (B23) overlooking Cape Jervis, July 2014.

Image © Michael Greenslade

Entering Cape Jervis:

Main South Rd (B23 / TD52) as it enters the town of Cape Jervis, July 2014.

Image © Michael Greenslade

Cape Jervis:

Main South Rd (B23 / TD52) as it passes through Cape Jervis, July 2014.

Image © Michael Greenslade

Advance Directional Sign:

Looking south east on Kangaroo Island at Baudin Beach approaching Bessell Drive. July 2004.

Image © Darrin Smith

Advance Directional Sign:

AD sign for Muston Road at Muston. July 2004.

Image © Darrin Smith

Advance Directional Sign:

AD sign located on Muston Road at Muston as you approach the intersection with Hogs Bay Road (B23), July 2004.

Image © Darrin Smith