The number of deaths on the road this summer shows road safety in New Zealand going backwards, the Automobile Association says.

Transport groups are urging drivers to still take extra care as the holidays draw to a close.

Ninteen people have died on the roads over the Christmas New-Year period, with the official toll coming to an end Wednesday morning.

AA road safety spokesperson Dylan Thomsen says five years ago the number of road deaths over the holiday period could be counted on both hands, but that had changed.

"This holiday period and the last one have been up back around that sort of 20 number. So it's really sad and frustrating to see things not going the way we want in terms of New Zealand," says Dylan.

"We want to see road safety improving, we want to see less people dying on the roads, and unfortunately in the last few years we seem to have gone backwards."

Last year, there were 21 deaths over the holiday period.

Thomsen says AA's research into fatal crashes found half of them involved ordinary, safe drivers, who had made a mistake.

He warned drivers to not get complacent, particularly when the roads were the busiest and there was less room for error over holidays.

"I think a lot of people still really think of fatal crashes as only involving people who are driving drunk, or drugged, or don't have a licence, or are driving ridiculously fast and dangerously- and there is some of that absolutely. But fatal crashes can happen to good drivers as well."

Road policing director, Superintendent Steve Greally, told Morning Report police had doubled their enforcement efforts in the past year, including breath screening.

Road-related deaths in 2023 reached 343, a slight drop from 372 the year before.

Steve says deaths had trended down since the 1980s, helped by better roads and safer vehicles, but that the toll was still too high.

Northland and Waikato saw a number of crashes this holiday season.. 

Northland Road Safety Trust manager Ashley Johnston says the region had a high road toll that was heading in the wrong direction.

She says poor driving decisions were having devastating consequences.

"In Northland we have a really, really high rate of people not wearing their seatbelts in our fatalities and serious crashes," says Ashley.

"Our people are actually dying as a result of their behaviour on the roads. It's a heartbreaking story and there's a lot of families that won't be having loved ones with them through the summer period."

Ashley wanted to see greater enforcement of laws around drink-driving, drug use and not wearing seatbelts.

In Waikato, police issued a warning about traffic congestion in the region, and say they are getting a high number of calls about speeding drivers.

Waikato District Mayor Jacqui Church says traffic levels in the district were already well above long term projections, and that could cause problems.

"For the state highway, people who drive through our district are actually at the volumes of 2032. So we're well over ten years ahead in terms of the percentage of people driving through Waikato District Council's express way to go to their destinations north or south," says Jacqui.

Jacqui says roadworks often took place during summer because they required warmer weather, and urged drivers to be patient.

She says any death on the road was a terrible tragedy.