Road Traffic Stops and Checkpoints
Written in plain language for general understanding. This is educational content, not legal advice. Based on Irish Acts of the Oireachtas, statutory instruments, and official guidance.
Irish National Law
What is this right?
The Gardaí have broad powers under the Road Traffic Acts to stop vehicles and check drivers. At a Garda checkpoint (also called a Mandatory Alcohol Testing checkpoint — MAT):
- You must stop when signalled to do so by a Garda.
- You must produce your driving licence, insurance certificate, and NCT disc if asked — or produce them at a named Garda station within 10 days.
- You may be required to provide a preliminary breath specimen to test for alcohol — refusing is a criminal offence.
- Since the Road Traffic Act 2010, Gardaí can also perform impairment testing for drugs.
- The legal alcohol limit for most drivers is 50mg per 100ml of blood (lower for learner and professional drivers: 20mg per 100ml).
When does it apply?
- You are driving or in charge of a vehicle on a public road.
- Garda checkpoints can be set up without prior notice and do not require individual suspicion for the stop itself.
- If you are involved in a road traffic collision, you must stop, give your details, and report to a Garda station within 24 hours if a Garda was not at the scene.
- Gardaí can also stop you if they have reasonable grounds to believe your vehicle is defective, uninsured, or untaxed.
What should you do?
- Stop immediately when signalled — failing to stop is an offence.
- Provide your documents if asked, or confirm you will produce them within 10 days.
- If asked for a breath test, comply — refusal is treated as seriously as failing the test (automatic disqualification).
- If arrested for drink or drug driving, request a solicitor before providing an evidential sample at the Garda station.
- You have the right to request a blood or urine sample in addition to the breath sample (at your own expense) for independent analysis.
What should you NOT do?
- Don't refuse a breath test — refusal carries the same penalties as drink driving (fine and disqualification).
- Don't drive away from a checkpoint — this is a serious offence.
- Don't argue at the roadside — if you disagree with a Fixed Charge Notice, you can challenge it in court later.
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