Almost 6,000 people were breathalysed as part of last month's drink and drug drive campaign in Northamptonshire. That is almost double the number the previous year.
Police arrested 115 people, that is 2 less than the year before, a result welcomed by police officers.
More top news
A dry bright and sunny start for most on Saturday. Some scattered showers will develop inland through the late morning.
A cold and frosty start to Saturday, though with some sunny spells. Showers then breaking out by afternoon.
A police chief has admitted his force were wrong to try to keep the identity of a Polish sex offender secret.