Engineer Mark Wolstenholme, co-author of the motoring association’s Princes Highway safety audit, said such signs could now be erected cheaply and might save lives.

He said a sensor could activate a “slippery when wet” flashing sign when the road was wet.

Mr Wolstenholme and NRMA South Coast director Alan Evans on Tuesday briefly visited the scene of two accidents which occurred on a wet day this year, within minutes of each other.

Max Bugden was killed in the second of those accidents on February 15 whilst heading north on the curve, just before the 70km/h zone begins, south of Batemans Bay.

In September, his son James called for authorities to consider reducing the 90km/h speed zone at the scene.

Yesterday Mr Wolstenholme said solar power and wireless technology had brought the price of such signs down.

Rather than have a permanent sign, he said it was worth considering one that was activated at known danger spots in wet conditions.

Mr Wolstenholme said the shoulder of the road, just south of the Eurobodalla Shire Council depot, could also be upgraded.

Watching cars navigate the curve yesterday, Mr Wolstenholme said the section warranted investigation.

“That car just drifted towards the centre line and if the person in the other direction drifted slightly, that is a head-on crash and they are travelling at 90km/h,” he said.

He said reducing the speed zone was “certainly worth looking at”.

“This curve tightens up here and it is sloping away down the hill,” he said.

“They have a guard rail there (to the north) to protect (cars) from dropping over that edge.”

Mr Evans said wire rope barriers should also be considered as interim measures.