Cooey Tancred and her father Geoffrey Mutton said cars slowing or stopping to turn right off Molong Road in a 100km/h zone into Thompson Road were at risk.

Mrs Tancred said the speed limit on the hill descent just out of Orange should be immediately cut.

"Make it 80 now while they [traffic authorities] work out what they are going to do," she said.

Mrs Tancred said she was slowing at the intersection last August when she was hit from behind by a car travelling at full speed and was nearly pushed into an oncoming truck.

"I just braced myself, I thought 'I'm dead, I'm into the truck," she said.

Mrs Tancred said she ended up on the side of the road.

"I said, 'where's the truck', he said, 'I'm here, go and buy yourself a lottery ticket."

She said many Thompson Road residents had been clipped or hit by cars there.

"My neighbour was hit [earlier this year], also turning right. She was stationary," she said.

John Keegan, a 15-year-old Year 10 student at James Sheahan Catholic High School, was killed on Friday night after a ute he was a passenger in collided with another car at the intersection.

Police said John went to the aid of the other car's passengers but a truck prime mover then crashed into the two cars killing him.

Geoffrey Mutton also called for a speed reduction.

"People just speed down this hill. The intersection is at the bottom of the hill," he said. "There's been a number of accidents there."

He said he had been trying to get the state government to improve the intersection with an extra lane and reduce the speed.

However he said not all accidents were reported by police, particularly if no one was charged or taken to hospital.

A Transport for NSW spokeswoman said it was carrying out a fatal crash investigation and will consider 'all measures' to improve safety at the intersection.

"Following feedback from the community, advanced warning signage at the intersection was installed in both January and April, and line markings at the intersection were also improved," she said.

"Transport for NSW also met with community members on site in March and discussed further safety treatments, including options such as isolated road widening opposite the intersection, to allow vehicles to pass on the left, which is expected to be delivered this financial year."

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