Police forces throughout Wales will be stepping up the pressure this summer in a concerted effort to deter people from driving motor vehicles whilst under the influence of alcohol or drugs. The campaign started on Monday and the likelihood of drivers being stopped by the police during this time will increase.  It is of real concern that despite significant improvements over recent years, together with advertising campaigns and education programmes, people are still being killed or seriously injured as a direct result of drink-driving. Indeed, there is evidence to suggest that the problem of young men willing to risk all by driving while drunk is re-emerging.  Any amount of alcohol or drugs in the body can affect a person's driving ability and judgment. Coupled with youthful exaggeration of driving ability, it makes for a fatal combination. "It is a major concern that in the 2006 All Wales campaign, 416 people were found to be over the prescribed limit. Almost half of these were young drivers aged between 17 and 25 years," said Chief Superintendent Geraint Anwyl, Head of the Operational Support Division, North Wales Police, who are heading this year's campaign. He added: "While we will be looking carefully at young drivers, this operation will look at drink drivers across the board. 500 people lose their lives in the UK every year as a result of drunken driving. The impact on families is lifelong and harrowing" "Dyfed Powys Police is committed to tackling drink/drug driving on the road network and will continue to work with colleagues in the other Welsh forces and Road Safety Wales on these dedicated campaigns," said Susan Storch, road safety officer for Dyfed Powys Police. "Even a small amount of alcohol can impair your ability to drive safely. The choice is simple - 'Don't drink, or don't drive'. Anyone with information regarding individuals who are believed to drive while over the legal limit can contact Crimestoppers anonymously and confidentially with any information on 0800 555 111.