Police warn the speed tolerance for Labour Weekend will be 4km/h for all posted speed limits.
They will also be blitzing seatbelts for adults and children.
The 4km/h concept, as opposed to 10km/h, was introduced for holiday weekends in 2010 after an Easter break when 12 people died on the roads.
Central District road policing manager Inspector Dave White said his district had some of the most frequently used roads in the country and he warned of congestion.
"Making sure your vehicle is fit for the journey and listening to radio traffic updates before you embark could save you unwanted frustration in the long run," Mr White said.