Southern Expressway Duplication


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Northbound carriageway closure

The northbound carriageway of the Southern Expressway will closed from 6am – 7pm on Saturday 20 September, 2014.

The closure will take place to allow for asphalting works, noise barrier construction, minor bridge works, light pole and underbridge lighting installation, retaining wall construction and Intelligence Traffic Systems works.

Asphalt Works – Beach Road, Noarlunga Centre

Final road surfacing works will be undertaken on sections of Beach Road from Sunday 21 September until early morning on Wednesday 24 September 2014.

Signage will be in place to alert motorists of the changes to traffic conditions.

For further details on these works please visit the traffic restrictions page.

Traffic restrictions on Main South Road and Marion Road

The works will be undertaken during inter-peak times, with speed restrictions of 40km/hr and 25km in place.

The restrictions will be as follows (weather permitting):

  • Southbound traffic on Main South Road, Bedford Park (south of Flinders Drive) will be reduced to two lanes until Tuesday 16 September, 2014. These restrictions will be in place from 9.30am - 3:30pm weekdays and 7am-7pm over the weekend.

    One northbound lane will also be closed from 9:30am until 3:30pm.

  • Southbound traffic on Marion Road, Sturt, will be reduced to one lane from mid/late this week between the hours of 7am and 3:30pm for approximately four days.

    The restrictions will be in place to allow for the replacement of overhead signage at this location.

    These signage works are part of a rolling program of works. Details of further restrictions will be provided in the near future.


    Southern Expressway open to two-way traffic

    The Southern Expressway opened to two-way traffic on Sunday 3 August 2014.

    Please click here to download a copy of our latest brochure, providing information on how to use the duplicated expressway. Please observe and obey on-site signage and take care whilst driving along the expressway and through the interchanges.


    Works after opening to two-way traffic

    Some construction activities will continue including interchange ramp road works, activation of the new two-way electronic signage system, landscaping, fencing, construction of the new western recreational pathway and noise barrier installation.

    For further details on these works please visit the traffic restrictions page.

  • The $407.5 million duplication of the Southern Expressway is a key part of the development of Adelaide's north-south corridor and, when complete, will deliver an 18.5 kilometre multi-lane, two-way expressway between Bedford Park and Old Noarlunga.

    This will provide people living in Adelaide’s south with improved access to employment, education, shopping and community facilities and will put Adelaide’s southern beaches and the McLaren Vale wine region within easier reach.

    This project will also support economic activity in Adelaide’s southern commercial and industrial areas like Reynella, Lonsdale and Noarlunga Centre as well as help the state achieve identified targets in the South Australia Strategic Plan.

    Please follow the links on the menu on the left-hand side or the quick links to the right to find out more about the project.