A police operation in Nelson targeting drink-driving caught 16 people red-handed and saw some arrested.
Ten checkpoints were set up by Tasman police over the course of last week, just over 1000 vehicles were stopped as breath tests were conducted.
Of the 16 arrested, one blew the test and was found to be almost three times over the limit.
Another two people blew more than twice the limit; the three drivers were taken into custody and will appear in Nelson District Court in due course.
Two other people were found behind the wheel with suspended and disqualified licenses - they had their vehicles impounded.