Drivers are being encouraged to take time out on their journey home this weekend.
There have already been six deaths on the roads, with another 20 hours to go in the official road toll period.
State's Driver Reviver spokeswoman Terri van Schooten says fatigue is a significant contributor to road accidents.
Last year 32 people died in crashes where fatigue was a factor, 141 had serious injuries, and 619 received minor injuries.
"The social cost to New Zealand is currently around about $250 million."
Terri van Schooten says there'll be Driver Reviver stops at Ohakea, Ruakaka and Ealing.
The death toll so far this weekend is seven, including a suspected hit and run in New Plymouth.
Photo: NZ Herald