28 people were killed last month, compared to just 21 in August 2010.
New Zealand Transport Agency spokesman Andy Knackstedt said that while every death was a tragedy, the overall figures released by the Ministry were heartening.
"It's certainly encouraging to see that we're heading in the right direction but do we need to bear in mind that every death is a tragedy."
Mr Knackstedt pointed out that the figures did not include figures for people maimed or injured in accidents.
He more work needed to be done to ensure "crash forces are minimised" and driving safety improved to ensure accidents did not result in casualties.
Knackstedt said it was too early for the NZTA could provide "definitive causes" or analysis for reasons beyond the overall drop in road deaths.