As this winter's drink drive campaign launches, drivers are advised to avoid the gamble of guessing if they are under the legal limit or not.
Nationally the number of car drivers who failed a breath test following a collision rose last year for the first time in a decade.
The figures from the Department of Transport show that in 2015 3,450 car drivers tested positive for drink driving compared to 3,227 in 2014. This is also the highest number since 2012, when 3,655 car drivers tested positive.
In Gloucestershire during 2015 there were 34 alcohol related collisions resulting in 49 casualties, and of these, 18 were killed or seriously injured.
Two local young people who know only too well the consequences of drinking and driving are Adj and Rachel.
Adj was convicted of drink driving and received a custodial sentence for the death of his friend Ben, and Rachel is Ben's sister. They will both be at the launch on Thursday to give their story and talk about the enormous effect on everybody, especially the family of the deceased.
Cllr Nigel Moor, cabinet member responsible for road safety said, "It's not possible to say how much alcohol you can drink and stay below the limit. The way alcohol affects you depends on your weight, age, sex and the rate your body uses energy. It also depends on the type and amount of alcohol you're drinking, what you've eaten recently and your stress levels at the time. So if you're driving, it's far better to have none for the road - 'Choose Zero' don't drink and drive, not just for Christmas but for every day of the year."
Martin Surl, Gloucestershire's Police and Crime Commissioner said, "I've made safe and social driving one of my priorities because more people lose their lives on our roads than anywhere else. And when you share the experiences of those who have killed someone or lost a loved one in this manner, it brings it home even more what a terrible and senseless waste it is.
"While most people's attitudes to drinking and driving have changed for the better, we must continue to remind those who put their own selfish and irresponsible needs first that adopting a zero approach to alcohol won't ruin your Christmas, but it might save a life".
Based on last year's figures in Gloucestershire, someone is injured as a result of a drink drive collision each and every week and these will be prevented if drivers choose a zero limit and stick to it.
Gloucestershire's Road Safety Partnership has always advised a personal zero limit before driving. Drinkers are also urged to understand how long it takes alcohol to leave the body to make sure that they are alcohol free when they drive the following day.
Sleep, coffee and cold showers don't help to sober you up - time is the only way to get alcohol out of your system. The average adult can process one unit in around an hour. This means that within an hour there should be, in theory, little or no alcohol left in the blood of an adult, although this will vary from person to person - so to choose zero you will need to allow at least an hour per unit before you think about driving.
Please choose zero, don't drink and drive.