Investigations are still continuing into a fatal motor vehicle accident in Bowral in which highly respected Highlands lawyer Peter Carney died.

Mr Carney's distraught wife Ann spoke of her frustration earlier this month that no charges had been laid over her husband's death but police may soon be in a position to act after receiving new evidence.

Mr Carney died nearly three months ago when his Ford utility was involved in a head-on collision with a Ford Forte sedan which police believed was travelling on the wrong side of Kangaloon Road.

The 35-year-old driver of the ACT-registered Ford Forte hire car was understood to have been of Singaporean nationality and was staying in Canberra with his sister at the time.

The police Accident Investigation Unit at Paramatta was looking into claims the driver may have suffered an epileptic fit prior to the August 7 crash.

While Sergeant Mick Bogg from the accident unit would not elaborate on the progress of the investigation, he did hint there was likely to be some movement shortly.

"Investigations are still ongoing but I can confirm at this stage there has been no arrest," Sgt Bogg said.

"I can't confirm that we are looking into claims that the driver suffered a fit or whether he is still in the country but I understand that the commander has recently been in contact with Mrs Carney to update her on the case's progress."

Mrs Carney confirmed that Traffic Services Commander Ron Sorrenson had telephoned her in response to her dissatisfaction at the police's handling of the case.

After being contacted on the Sunday after the crash, Mrs Carney said she had heard nothing from the police until she wrote to them on September 6 while the driver was not interviewed until September 12, nearly five weeks after her husband's death.

"He asked me what I most wanted from the case and I just said 'fairness'," Mrs Carney said.

"They gave me no guarantees that there would be any arrests but I do understand that they have received some new evidence in recent days which they are looking at."

Mrs Carney said the officer in charge of the investigation, who she claimed led her to believe there was little likelihood the investigation would go further, had now handed over the running of the investigation to a more senior officer.

She said a Burrawang man had contacted the investigating officer several weeks ago to provide the names of witnesses who had not yet been interviewed, including one person who allegedly saw the driver after the crash and could provide details of his medical condition at the time.