Police are urging motorists to drive to the conditions after a fatality-free start to Queen's Birthday Weekend.
Seven people died in four fatal crashes over the same long weekend last year.
Assistant Commissioner of road policing Dave Cliff said it had been a positive start but the real risk period began when holidaymakers started heading back home today.
He urged people to drive to the conditions after recent cold snaps and high winds in parts of the country.
Mr Cliff said very high winds in Central Otago had blown a few motorcyclists off their bikes and a campervan had been blown over near Lake Pukaki.