There were four deaths in May last year and by the end of that month the road toll was 15. The region's road toll this year is currently 18.
The year got off to a bad start with five fatalities in January, four in February and six in March.
Head of the Road Policing Unit Inspector Wayne Ewers said it was a rough start to the year and if the fatalities had continued at the same rate the region would have been tracking towards more than 50 deaths.
He said investigations into yesterday's crash would continue and charges could be laid.
Northland made up 3.4 per cent of the New Zealand population but last year, with 40 fatalities, accounted for 11 per cent of the road deaths in the country.
In 1989 there were 55 deaths on Northland roads, while the lowest on record was seven fatalities in 2011.