The drink-driving campaign is running for two weeks

Although 50% fewer motorists were stopped during this year's summer campaign compared with last year, 7% were positive - the same number as in the past two years.

The four forces launched a joint anti-drink and drive enforcement campaign in August.

However, police have said they are disappointed with the results.

Throughout Wales, 3,085 motorists were breath-tested, and 222 (7%) proved positive or failed or refused to provide a sample.

Summer drink-drive results Dyfed Powys Police : Breath tests 794; Positive tests 43 Gwent Police: Breath tests 790; Positive tests 50 North Wales Police : Breath tests 919; Positive tests 57 South Wales Police: Breath tests 582; Positive tests 72

One encouraging aspect, however, was a 30% reduction in the number of motorists who proved positive at a scene of a road accident.

There were just 43 incidents across Wales where alcohol was a known contributory factor.

But still, police say the overall results of the summer campaign made disappointing reading.

"We are very disappointed," said Bob Parkes, a road safety officer with Dyfed Powys Police.

"It is clear that the message of 'don't drink and drive' is not getting through to some motorists.

"Drinking and driving is a fool's game and those who continue to ignore the drinking and driving legislation, endangering themselves and other road users will only have themselves to blame for the consequences."

The four Welsh forces launch their summer anti-drink driving campaign in Tenby, west Wales, just three weeks ago.

This year, they were asking motorists to consider how much alcohol was contained in drinks served at social events.

Home measures

Police have long been concerned that summer activities such as barbecues and garden parties mean people were often consuming large amounts of unmeasured alcohol.

They asked people to consider how much alcohol was actually in a glass of wine or beer and to remember that home-poured measures could be much higher than the units of alcohol served in pubs.

But the real message remained the same - if you are going to drive, do not drink at all.

The launch was supported by Primary Substance Misuse (PriSM), Mid and West Wales Alcohol and Drug Advisory Service, British School of Motoring and drinks industry body the Portman Group.

The campaign sought to highlight that even official UK Government advice about how much motorists could drink whilst driving could be questionable.

Officers made the point that much of the standard advice referred to fixed units of alcohol, which was an unreliable way of calculating the level of alcohol in the body, as different people's bodies disposed of alcohol in different ways, and also beers came in various strengths.