Extra police patrols will be out for the next four weeks looking for drivers under the influence of drink or drugs.
The Festive Road Safety Campaign started on Monday and police are warning motorists that anyone committing a traffic offence will be breathalysed.
Police wish to make motorists aware that driving at excessive speed and while under the influence of drink or drugs greatly increases the chance of having an accident.
They urge people to make advance arrangements for getting home after social events and to be aware that many offences are committed the “morning after”.
It is impossible to measure the amount of alcohol remaining in the system and drivers should bear this in mind before getting behind the wheel, even if it was some hours since their last drink.