Police will be keeping an eagle-eye on traffic speeds over the summer, warning tickets will be handed out for those who exceed the limit.
Over the holiday period - between 4pm today and 6am on January 7 - anyone travelling more than 4km/h over the speed limit will be ticketed.
National manager for road policing Superintendent Steve Greally is urging New Zealanders to slow down this summer and said "less speed does mean less harm".
"I've seen first-hand the impact of speed in a crash, a 10km/h difference could save your life," he said.
"This is one of those messages some people don't like hearing, and some refuse to take on board. I just don't understand it.