Paschal Donohoe has denied claims in The Irish Times that only 40 per cent of summonses result in convictions.
He says the figures reported were faulty, because they included summonses which had not been processed, or cases that hadn’t finished.
And he has said the actual conviction rate is twice as high as reports had claimed.
“These figures were then portrayed by treating convictions as a percentage of summonses leading to the false conclusion that 60% of cases which were taken to court led to acquittal,” Mr Donohoe said.
“The reality is that approximately 86% of drink-driving cases which go to court, result in convictions.”