It showed that while parents are keen to help their teen pass their restricted test, few are keen on committing to the recommended amount of practise and supervision.
"Road crashes are the single biggest killer of 15- to 19-year-old New Zealanders, and we need parents to stay involved when their teenagers are learning to drive to help prepare them for the responsibility of solo driving," said NZTA chief Geoff Dangerfield.
"One hundred and twenty hours is the recommended time teenagers should spend in a supervised car to help gain experience and confidence, but our research shows this isn't happening in some cases."
As part of the Government's Safer Journeys strategy, the NZTA is working on changes to toughen the restricted licence on-road driving test to encourage 120 hours of supervised driving in the learner licence stage.
The new tests are likely to be implemented in February.
The Safe Teen Driver campaign was started in June to help raise awareness of the risks teen drivers face and to give parents some tools to help them take an active role in addressing the problem.
"The good news from our survey is that 89 per cent of parents want to stay involved until their teenager passes their restricted test," said Dangerfield. "But the same parents are happy for their teenagers to apply for their restricted with only half the amount of recommended practise."