Investigation into Tullamarine Freeway signage

22 February 2019

Safety of road users is our top priority and engineers have been working to identify and rectify what caused a sign to fall on the Tullamarine Freeway in January.

We took immediate steps to conduct an audit of all road signs installed as part of the CityLink Tulla Widening Project of similar size and structure to that which fell on the Tullamarine Freeway and can confirm there are no signs of deterioration or stress.

Our preliminary findings into the cause of the fallen sign have found ‘stiffener plates’ inside the gantry that provide additional support for the sign had not been installed according to the approved design.

These stiffener plates were required for two other signs which have also been removed as a precaution. Stiffener plates were not required to support any of the other similar signs installed as part of the CityLink Tulla Widening Project.

We will continue working with the builder CPB Contractors to complete the investigation and confirm our preliminary findings.

In addition to work to re-engineer and verify the signage designs and design calculations, further materials testing is occurring on the gantry where the sign fell. This is being removed to facilitate this work. A new gantry will be fabricated to replace it.

We are committed to completing a robust and rigorous investigation and once we have the full findings, the removed signage will be safely reinstalled and supported.





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