Almost 400 people were arrested for driving while under the influence of alcohol or drugs in December as part of a crackdown by Thames Valley Police.
From 1st December 2021 to 1st January 2022, the Joint Operations Roads Policing Unit of Hampshire Constabulary and Thames Valley Police launched Operation Holly, which combined educational and enforcement activity and was supported by officers across both forces.
229 people were arrested for drink-driving and 152 for drug-driving.
While 5% of all the breath tests conducted gave a positive result, 47% of the drug wipes carried out were positive.
People aged 25-34 were the worst offenders in both categories, accounting for just over a third of all positive tests (37%).
Sergeant Dave Hazlett, of the Thames Valley Police and Hampshire Constabulary Road Safety Unit, said: “These figures show that we will not tolerate drink or drug driving on the roads of the Thames Valley.
“The percentage of positive breath test results reflects what we already know – that the vast majority of road users follow the rules. I would like to thank everyone who drove responsibly over the festive season and helped to keep our roads safe.
“On the other hand, the percentage of positive drug wipes shows that drug driving remains an issue, across several age groups.
“Although the operation has ended, we are still policing our roads and arresting drink and drug drivers on a daily basis. Make sure you drive responsibly so your name is not added to that list.
“Our advice is clear. Drinking alcohol or taking any drug, even if prescribed, can affect your ability to drive safely - so it’s not worth the risk.”
Driving while impaired through drink or drugs can increase the chances of people being killed or seriously injured in a road traffic collision.
If you know of anyone who is drink or drug driving call 999 in an emergency, 101 with information or report anonymously via Crimestoppers.