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Three signs over two Melbourne roads will be removed for testing as part of an audit after one came crashing down on a woman's car.
From 10pm Saturday night, Transurban will remove one sign from a gantry on CityLink between the Dynon Road exit ramp and Footscray Road, and two signs from a gantry on the West Gate Freeway between the Bolte Bridge and Ingles Street, VicRoads said in a statement.
VicRoads says the signs show no evidence of stress or any immediate concern, but were installed by CPB Contractors which was used by Transurban as part of the CityLink-Tullamarine Widening Project, and VicRoads believes that these particular signs should be removed for closer inspection and further testing.
The removal is part of an audit of signs after one fell on Nella Lettieri's car on the Tullamarine Freeway on Tuesday.
An initial analysis of the three signs shows they have a similar structural configuration to the sign which fell.
"These signs are being removed as part of the ongoing audit but I assure the community that if we had any immediate safety concerns, the roads would already be closed," VicRoads deputy chief executive Robyn Seymour said.
"We said we would undertake a rigorous audit and that's what we're doing because safety is our absolute priority."
The audit initially focused on the 17 gantries installed as part of the CityLink-Tullamarine widening and has been extended to other gantries of a similar size and structure on Melbourne's freeways.
It is expected that preliminary audit of gantries will be finished within days.
Ms Lettieri escaped serious injury when the four-metre by five-metre sign fell onto her car on the Tullamarine freeway, near Essendon Airport, about 5.30pm on Tuesday.
Dashcam footage from a vehicle behind shows the force of the giant sign, moving Ms Lettieri's car even though she had slammed on her brakes.
The weight of the sign crushed Ms Lettieri's car, shattering the windscreen and scattering glass across the highway. No other cars were hit.