South Australia

McConnell Dowell wins contract for O-Bahn tunnel design and construction

THE South Australian Government last week announced that McConnell Dowell will design and build the $160 million O-Bahn City Access tunnel project, with up to 450 jobs expected to be supported over the life of the project.

Artist's impression of O-Bahn City Access Project
Above: Artist's impression of O-Bahn City Access Project / Department of Planning, Transport and Infrastructure.

"McConnell Dowell has delivered some of the state's key infrastructure projects in recent times, including the award-winning Riverbank Bridge – the centrepiece of our Riverbank Precinct," said Transport and Infrastructure Minister Stephen Mullighan.

"The company has also been involved in a number of other award-winning projects including the Bakewell Underpass and the Adelaide Showgrounds Station."

"McConnell Dowell is engaging SAGE Automation which will provide expertise in the mechanical and electrical components of the tunnel," Mr Mullighan said.

This includes the design and construction of:

  • The tunnel ventilation system;
  • Security surveillance and incident detection systems;
  • Fully automated traffic management systems;
  • Fire and life safety systems;
  • Power supply systems; and
  • Lighting.

According to the Minister, SAGE Automation will deliver some of the latest Intelligent Transport Systems for the project which will monitor safety, traffic flow, CCTV and communications within the tunnel as well as provide for emergency response in the event of an incident.

The O-Bahn City Access Project will extend the O-Bahn track from Hackney Road into the cross-city priority (bus) lanes on Grenfell Street.

From the current O-Bahn exit point at Gilberton, buses will continue via centrally aligned priority bus lanes along Hackney Road. In addition to the bus-only priority lanes, two traffic lanes and bicycle connectivity in each direction will be maintained

Rundle Road and East Terrace will be reconfigured, to provide improved cycling infrastructure, additional parking spaces and improved pedestrian connectivity.

Construction on the project is expected to begin later this year, with completion schedules for the second half of 2017.

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