Major milestone as final roof planks installed for O-Bahn City Access Project

08 June 2017

SA Government: The final roof planks for the O-Bahn tunnel will be lowered into place today marking another major milestone for the O-Bahn City Access Project.

In total 423 precast concrete roof planks have been used for the 670m dedicated bus tunnel from Hackney Road near the National Wine Centre to Grenfell Street.

The final planks will be installed on Hackney Road today, just over a year after main works contractor McConnell Dowell began construction.

Other milestones for the project include:


The $160 million O-Bahn City Access Project will create a dedicated tunnel linking priority bus lanes on Hackney Road and Grenfell Street.

The tunnel will improve travel times and reliability for Adelaide’s busiest public transport network, which is used by more than 31,000 people each weekday.

The project will also improve travel times and reliability for more than 79,000 road users who use this part of the Inner Ring Route at the intersection of Hackney Road and Botanic Road.

Approximately 450 South Australian jobs are being supported over the life of the project, which is expected to be complete by late 2017, weather permitting.

More information is available on the O-Bahn City Access Project website.

Quotes attributable to Transport and Infrastructure Minister Stephen Mullighan

The installation of the final roof planks for the O-Bahn tunnel is a significant milestone for this project which is still on budget and on schedule to finish by the end of this year.

Already we have seen some of the benefits of this project, even during the construction phase, with the creation of the priority bus lanes on Hackney Road.

The most significant benefits for both buses and the more than 79,000 vehicles using this part of the Inner Ring Route will be evident when the tunnel opens later this year, weather permitting.

By removing buses from the rest of the traffic we will not only give our most popular public transport network a better run, but we will also remove more than 1000 buses each week day from the road corridor, freeing up space for more cars.

This project is about delivering more reliable service for our bus passengers, and faster journeys and fewer delays for all road users on this part of the Inner Ring Route.

This project is also delivering hundreds of jobs as well as significant economic benefits to South Australia, with the value of works undertaken on the project to the end of April 2017 reaching just over $88 million.




Source:  South Australian Government -

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