A lower 4km/h speed tolerance is being put in place thisWaitangi Weekend by police, which will continue until the end of February.
Masterton Senior Sergeant Carolyn Watson said it was a reminder to holidaying drivers to be careful.
"Drivers just need to remember to take breaks if they're on long drives, slow down, and be patient on the road," she said.
She also reminded drivers to slow down around schools.
Police Acting Superintendent Rob Morgan said lowering the tolerance had made a real difference to the number of deaths on roads over holiday periods.