A drink-drive operation has been carried out in three villages across the Daventry district.
It saw more than 100 drivers asked to take tests at the side of the road in Badby, Crick and Woodford Halse on Thursday.
A total of 124 drivers who were stopped voluntarily gave breath tests. Of those tested, nine had some alcohol in their system.
One of the people who had drunk alcohol before driving had a reading so high he was arrested and charged with drink driving. He will appear in court in September.