A campaign to deter motorists from drinking and driving in Cornwall and Devon over the festive period is to begin next week.
From Monday police in the two counties will be carrying out roadside checks in the evenings and early mornings.
Officers will continue to breathalyse drivers involved in crashes.
They will also continue to target motorists whose driving may lead them to suspect they are under the influence of drink or drugs.
It is hoped the campaign, which is part of a nationwide initiative organised by the Association of Chief Police Officers (ACPO), will help reduce the number of people killed or seriously injured in road accidents.
The campaign will be supported by posters, beer mats and stickers in bars, pubs and clubs and advertising on petrol pumps throughout Devon and Cornwall.
Insp Richard Pryce said: "We will not tolerate drink and drugs driving at any time of the year but clearly focus our attention more during the party season.
"The number of people who are killed through drink and drugs driving is too high and can be reduced.
"We urge people to think about how they are going to get home after they have been drinking, and make suitable arrangements before they go out."
Insp Pryce added that people needed to think carefully about driving the morning after a drinking session as they could still be over the limit.
Those convicted of drink-driving can expect to be banned for at least 12 months, receive a fine of up to £5,000 or even be jailed for six months.
Drunk drivers who kill people can be jailed for up to 10 years.