Investigation Into Giant Road Sign That Collapsed Onto Car

A giant road sign has fallen and crushed a car on one of Melbourne's busiest freeways, leaving the driver lucky to escape major injury. 

The woman was driving on the Tullamarine Freeway, near Essendon Airport, when the four-metre by five-metre sign fell onto her car about 5.30pm on Tuesday.

Footage from the scene shows the blue vehicle crushed beneath the overhead sign with its windows shattered.

The woman was taken to Royal Melbourne Hospital with an injured arm. No other vehicles were hit.

Image: Facebook / Has Bek

Graeme Chambers, delivery director at the Major Roads Project Authority, said it was an "extremely rare situation".

"It has somehow failed where the connection is to the overhead gantry," he told radio station 3AW on Wednesday.

"We last night mobilised our engineers as soon as we learnt of the incident.

"Obviously our thoughts are with the woman as she recovers."

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Chambers said a detailed investigation is underway into why it occurred, also noting other signs installed about one year ago as part of a project to widen the freeway would be inspected.

He added a nearby sign on the same gantry was checked on Tuesday night and found to be safe.

The authority will work with contractor Transurban and VicRoads in its investigation.

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With AAP 

Featured image: Facebook / Has Bek