Marlborough District mayor John Leggett says he's been assured any road improvements needed after a tragic accident at the weekend, would be made without delay.
Seven people, including a baby, died in a crash between a refrigerator truck and a van on State Highway 1 south of Picton yesterday.
Two people were injured in the head-on collision. One was in a stable condition on Monday morning, while the other was in ICU in a serious condition.
Police said it appeared the van crossed the centre line.
The nine occupants of the van were travelling home from the funeral of an elderly relative in Dunedin.
A family member of the group told RNZ she had lost everyone.
Princess Clariman said she was the only family member to stay behind in Auckland, and her parents, brothers, cousin and aunt were in the crash.
She was at Wellington Hospital with her brother and another family member who survived the crash.
RNZ understands from a person close to the family that police would be getting in touch with a large extended family, including relatives in the Philippines.
One of the those killed also left a first wife and family to be contacted.
"In the blink of an eye, seven lives are gone," Paul Borrell of Tasman police told media on Sunday.
Marlborough District mayor John Leggett told Morning Report the accident was an "absolute tragedy".
"I heard the emergency sirens coming from here in Blenheim," he said.
"It was pretty clear there was a major event that had occurred."
Leggett said that section of the state highway was one he knew very well.
"On the face of it there doesn't seem to be any obvious roading issues, or traffic issues."
He said if there were safety improvements needed, council had been assured they would be implemented without delay.
"There will be a full report done and we will expect appropriate action to happen."
The crash scene was described as "absolute carnage" and a terrible sight.
Fire and Emergency group manager Steve Trigg was among the 16 firefighters to attend the scene.
"In 30 years, and I can only speak for myself, I've not been to an incident like that with a large loss. Very difficult for everyone and it will have an impact on all of those involved."
Trigg said everyone dealt with this kind of incident in different ways. "It takes time to process it, time to understand what's happened and this loss of life will take quite some time."
"It's really just important that we do everything we can for them and wrap good support around them."
He said his staff had attended accidents along this stretch of highway before.
"I know they [Picton staff] have attended a recent fatality, within the last 12 months, on that stretch of highway."
Waka Kotahi director of land transport Kane Patena said the agency was assisting the Police Serious Crash Unit, which was leading the investigation into the crash.
"We will also carry out our own review of the crash site, as we do in response to all fatal crashes on the state highway network, with a focus on the potential contribution of any road or roadside factors to the crash, and any safety improvements which can be made at the site. It's important that allow this work to be completed in order to have a full and accurate understanding of all of the factors which may have contributed to this crash."
Rick Rawlings, who lives nearby, told Morning Report he was constantly expecting the next accident to happen, with others occurring in the area in the last couple of years.
"We just wait for the sirens and the bangs and we know there's been another accident out there. The piece of road starts at Picton and climbs up a hill, climbing up that hill changes into 100km from the town, from 50km, and everybody accelerates."
The road should be widened and the speed limit lowered to prevent further tragedies, he said.
Deputy mayor of Marlborough District, Nadine Taylor, told First Up there had been one accident near the site of the crash in the past couple of years, and one further along the road.
Sitting on the Transport Committee at council, Taylor said she sees the accident reports from the area and any commonalities would be investigated.
"If there was an aspect to the road [that was dangerous] then Waka Kohahi and council would be talking about that."
Waka Kotahi said significant investment had been made in improving the route since the Kaikōura earthquake.
Prime Minister Jacinda Ardern said work was being done to bring down the road toll which included safety modifications and the enforcement of rules.
The government had invested an additional $2.9 billion into road safety activities over the next three years, she said.
It had a target of a 40 percent reduction in serious road accidents by 2030.
Looking at accidents generally, it was important to determine whether it was a stretch of road that had seen repeat accidents, Ardern said.
"In those cases understanding the contributing factors and making the changes that are needed to make that stretch of road safer."
That could include things like greater use of median barriers, she said.
Secondly, it was important to ensure people were taking road safety seriously and ensuring people were not using their phones or speeding for example.
She said the Picton crash was an "absolutely horrific accident".
Police said formal identification of those who died was underway but would take some time to complete.