The official road toll for Queen's Birthday Weekend is double what it was last year.
Six people were killed on New Zealand roads between Friday and Monday, including four drivers, one motorcyclist and a motorcycle passenger.
It's three more deaths than the Queen's Birthday toll in 2018.
"Any death on our roads is one too many, so six people being killed over one holiday weekend is absolutely shattering for many whānau, families and communities," said Inspector Peter McKennie, Operations Manager for Road Policing.
"We've seen far too much heartbreak in our communities already this year as the result of tragedies on the road."
He said all New Zealanders have a part to play in preventing fatal accidents, and urges motorists to stay conscious of hazards on the road this winter.
"There is no silver bullet, but drivers can help keep themselves and others safe by driving in a manner and at a speed that enables a safe response to the unexpected, not being distracted and paying close attention to the changing driving environment and conditions, never driving tired or impaired by alcohol or drugs, and making sure everyone always wears their seatbelt or child restraint," he said.
"Most people behave safely on the roads most of the time, but it only takes one risky decision or moment of inattention to result in tragedy, including on the part of those who generally drive or ride in a safe manner.
"Road safety is everyone's responsibility."
The 2019 road toll now stands at 170, after two people died when a cattle truck collided with a car in Canterbury on Tuesday.