According to police, Jack Donald Bowd, 18, of Riddell Street, Molong, was driving along Euchareena Road at Molong at 8.20pm on December 17, 2018, in a white Toyota HiLux ute when he crashed.

Police said about six kilometres from Molong he negotiated a left-hand bend while descending a hill, which had a causeway at the bottom with a 55km/h speed advisory sign.

Bowd told police he was not driving above his 90 km/h speed limit but did not notice the advisory sign.

According to the police investigation, as Bowd entered the causway he crossed to the wrong side of the road and "over corrected" causing the ute to leave the road and hit an embankment about 40 metres from the causeway.

The snorkel and windscreen came off as the ute travelled along the embankment and through a fence before stopping in a paddock about 100 metres from the causeway.

According to police, it appeared the vehicle rolled several times and although the female passenger said she was wearing a seatbelt, she was thrown from the ute and was found 10 metres past the vehicle.

Bowd and the passenger were taken to Orange Health Service and the passenger was later conveyed to Westmead Children's Hospital due to fractures to multiple vertebrae in her neck.

Bowd also suffered a badly broken arm as a result of the crash.

The court heard Bowd had been licensed to drive since May 2018, travelled for work and still had the support of the victim and her family.

Bowd was charged with negligent driving, not occasioning death or grievous bodily harm.

Magistrate Alexander Mijovich convicted and fined Bowd $400.

"This will affect his points I believe," Mr Mijovich said.

"I fully appreciate you've learnt a lesson from this.

"Like any traffic matter good character doesn't play such a great role."