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Darlington Upgrade Project

Our Role

SMEC is part of the Gateway South Consortium, comprised of the Design Joint Venture (SMEC, Jacobs and KBR) and Construction Joint Venture (Fulton Hogan and Laing O’Rourke) engaged to design and construct the A$620m project.

SMEC (in association with its Joint Venture partners) is responsible for design coordination, traffic modelling, traffic engineering, geotechnical, bridge and road design, drainage and hydrology, and Intelligent Transportation System (ITS) design.

Project Overview

This project forms part of the Adelaide North-South Corridor Upgrade, a key component in South Australia’s ongoing transport infrastructure strategy. This 78 km north-south freight route will be upgraded to eliminate bottlenecks and provide non-stop road links to connect rapidly expanding industrial and residential growth areas throughout Adelaide.

The Darlington Upgrade Project will comprise the upgrade of 3.3 km of Main South Road, including a non-stop motorway between the Southern Expressway and Tonsley Boulevard requiring grade separations at five intersections.

Major project elements include:

  • A lowered, non-stop motorway passing underneath Flinders Drive, Sturt Road, Sutton Road/Mimosa Terrace and Tonsley Boulevard
  • Grade separation of the Main South Road/Ayliffes Road/Shepherds Hill Road intersection
  • Main South Road (at grade) service roads along both sides of the lowered motorway
  • Full free flow interchange at the Southern Expressway/Main South Road with dedicated ramps providing direct access to the new motorway and Main South Road.

This project is one of the most complex transport projects undertaken within South Australia.

Technical Area:
Department of Transport, Planning and Infrastructure

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