The police launched their summer drink drive campaign this week.
Dyfed-Powys police acting assistant chief constable, Mr. Andy Edwards launched the campaign on behalf of the four Welsh police forces on Tuesday.
At the launch, he urged people to consider carefully the amount of alcohol that they drink during the summer months.
The figures for the last two summer drink and drive campaigns have shown that there is a higher percentage of motorists who drink and drive during the summer months compared to the Christmas period.
The figures show a change in trend in that out of these motorists a large number are younger drivers (18-25) whereas in the past it has tended to be the middle aged.
Police forces are however determined that the small minority who deliberately flout drink/drive laws will be tackled in a robust manner.
Traditional summer pastimes such as barbecues and parties often result in an increase in occasions where people are consuming alcohol limits which are way above that which is legal to drive.
Despite this, many are tempted to drive. The majority of people make plans and are sensible about their travel arrangements, but there is also a hard core that are prepared to flout the law and drive with excess alcohol in their system.
Advice is readily available from medical services, government, and many other areas as to how much alcohol you can drink, and drive afterwards.
Much of this advice refers to fixed units of alcohol however which is an unreliable way of calculating the level of alcohol within your body and your ability to drive, everyone's body reacts in different ways and at different times.
It is therefore extremely difficult to gauge with any accuracy how much alcohol is in your body and whether you are fit to drive, without using correctly calibrated and approved equipment.
Additionally, the strength of beers varies tremendously and a home measured glass of wine varies considerably, to that in pubs.
In short there is no guaranteed way of knowing what you've actually had to drink and whether you remain within legal limits - hence the advice that it is better to limit yourself to soft drinks when driving.
The only sure way is not to consume any alcohol if driving.
The summer campaign runs until 6 am on Tuesday, July 20.