DTT Alcohol, Drugs, and Safe Driving

Question 1

What is the legal blood alcohol concentration (BAC) limit for experienced drivers in Ireland?

Accepted Answer

50 mg of alcohol per 100 ml of blood

Answer

The legal BAC limit for experienced drivers in Ireland is 50 mg per 100 ml of blood. Exceeding this limit is a criminal offence and will result in prosecution.

Question 2

What is the BAC limit for learner, novice, and professional drivers in Ireland?

Accepted Answer

20 mg per 100 ml of blood

Answer

Learner drivers, drivers with fewer than 2 years post-test experience (novice), and professional drivers are subject to a lower limit of 20 mg per 100 ml of blood.

Question 3

If a Garda suspects a driver of drink driving, what test can they require at the roadside?

Accepted Answer

A preliminary breath test using a breathalyser

Answer

Gardaí can require a preliminary breath test at the roadside using a breathalyser. If this test is positive, the driver is taken to a Garda station for an evidential breath test.

Question 4

How does alcohol affect driving ability?

Accepted Answer

It impairs judgement, slows reaction time, and reduces coordination

Answer

Alcohol impairs judgement, reduces reaction time, decreases coordination, and causes overconfidence. These effects begin well before the legal limit — there is no truly 'safe' amount for driving.

Question 5

Can prescription medications affect your fitness to drive?

Accepted Answer

Yes — some medications cause drowsiness, blurred vision, or impaired judgement

Answer

Many prescription medications can impair driving ability by causing drowsiness, blurred vision, or reduced concentration. Always read the label and consult your doctor or pharmacist.

Irish DTT Practice Test

Irish DTT Practice Test

DTT Alcohol, Drugs, and Safe Driving