Wollondilly MP Nathaniel Smith told parliament late last week of the recent death of Ty Delaney on that road, adding that he was one of a number of fatalities.

"Since 2014 there have been 10 fatalities, eight of which occurred along one deadly eight-kilometre stretch of road," Mr Smith said.

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The Wollondilly MP said the dangers of the road would not be fixed by people paying more attention when behind the wheel.

"We can encourage people to drive more safely but that alone will not prevent deaths from occurring on a road like Picton Road," he said.

"That road is too unforgiving. A momentary lapse of concentration by one driver not only puts their life in peril but also imperils the lives of those innocently travelling in the opposite direction."

The government MP is also part of the Picton Road Motorway Coalition, a group pushing to duplicate the road.

In his speech, Mr Smith said concrete and wire median barriers were not enough of a response to the fatal head-on collisions on Picton Road.

He noted that when the bulk of the Pacific Highway was duplicated, it resulted in a 50 per cent reduction in fatal crashes.

"The senseless tragedy and destruction to families must end," Mr Smith said.

"The endless talk must end. The blame shifting and politics must end. It is time to deliver for the road users of Picton Road.

"Today I implore the Treasurer and the Roads Minister to commit to the duplication of Picton Road to motorway standard."

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