Road safety advice

9/30/2019 10:51:02 AM

4. Drink and drug driving

Drink driving

There are strict alcohol limits for drivers, but it's impossible to say exactly how many drinks this equals as it's different for each person. If you are driving, it's best not to drink at all.

Find out more about road safety laws and the drink driving penalties (via 

National campaign

Transport for Buckinghamshire (TfB) supports the Morning after Campaign, which looks at the risks of drink driving the morning after. It takes a lot longer than most people think for alcohol to pass through the body, on average about one hour per unit of alcohol.

Download the Morning After Calculator app (via to calculate when it will be safe for you to drive the morning after drinking alcohol.

Alcohol free recipes

TfB have developed some delicious Mocktails recipes, which can be found on the Travel Safe Bucks blog, or as recipe cards (pdf).


Drug driving

The police can stop you and make you do a 'field impairment assessment' if they think you're on drugs.

They can also use a roadside drug kit to screen for cannabis and cocaine.

If they think you're unfit to drive because of taking drugs, you'll be arrested and could be charged with a crime if the test shows you've taken drugs.

Prescription medication

You don't have to be on illegal drugs, prescription or over the counter medicines can also impair your ability to drive. If you're taking medicines, talk to your doctor, pharmacist or healthcare professional before driving.

Changes to the drug driving law

On 2 March 2015 the drug driving law changed. It is now an offence to drive with certain drugs above a specified level in your blood.

The new offence will work alongside the existing offence of driving whilst impaired through drink or drugs. View the drug driving law (via

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Last updated: 30 September 2019

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