A 79-year-old motorist is one of 95 who have been arrested on suspicion of drink-driving.
The driver was the oldest suspect arrested by Thames Valley Police during the 'Is it worth the risk?' campaign to stop people drinking and driving this summer.
The campaign which started on Saturday last week.
The youngest suspect was 18 and the average age was 36.
Of the 95 arrested 34 have been charged, 48 bailed and 13 released with no further action.
They show an increase of 28 arrests on the 67 arrests made during the same period in 2012.
The campaign, which runs until the end of the month, will see police targeting people suspected of drink or drug-driving late at night or the morning after a heavy night.
Berkshire has seen the highest arrest numbers of 45 with 22 in Buckinghamshire and 28 in Oxfordshire.
Superintendent Henry Parsons, head of roads policing for Thames Valley Police, said: "Drinking and driving wrecks lives, most obviously the hundreds of victims and their loved ones who are killed each year.
"But it also changes the lives of the people who are selfish or stupid enough to drive when they are not fit to do so."
He added: "If you choose to drink and drive - and it is a choice - you face a driving ban, up to £5,000 in fines and a criminal record.
"There is no excuse for drink-driving and our message is simple; don’t do it. It’s not worth the risk."
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