Your Rights at a Traffic Stop in Spain: A Driver's Practical Guide

A traffic stop is a tense situation in which many drivers do not know what they can demand, what they are obliged to do, and where the limits of police action lie. Knowing your rights in advance makes the difference between handling the check calmly and making mistakes that then shape the whole proceedings. As a firm focused on defending drivers' rights, in this practical guide we explain what you can and cannot do at an alcohol or drug checkpoint in Spain, and what safeguards protect you.

What a Traffic Stop Is and What You Can Be Asked

A traffic stop is an administrative measure to prevent and monitor road safety. During it, the officers can require you to identify yourself, to produce the documents for the vehicle and the driving licence, and to take the tests that detect alcohol and drugs. These obligations are set by law and failing to meet them carries consequences.

That said, complying with what is mandatory is one thing; waiving your safeguards is quite another. A driver subject to a check keeps a bundle of rights that the officers must respect and that the defence can later rely on if they were not respected. Telling apart what you are obliged to do from what you voluntarily choose to do is the first key to not harming your own case.

The Right to Be Informed

You have the right to be told clearly about the nature of the check, the facts alleged against you and the consequences of the tests you are about to take. If you do not understand the language, you are entitled to an interpreter, under Article 123 of the Criminal Procedure Act and Directive 2010/64/EU on the right to interpretation and translation in criminal proceedings.

This information is not a mere formality: someone who does not know they can ask for a counter-analysis, or who does not understand what they are signing, is at a disadvantage. That is why a lack of proper information can be a weak point in the police report that the defence will examine in detail.

The Right to a Counter-Analysis

This is one of the most important rights and, at the same time, one of the least known. After the breath test (the evidential breathalyser) or the saliva drug test, the driver has the right to request a counter-analysis by blood test, urine or similar means, under the General Traffic Regulations.

The significance of this right is huge. A blood test is more reliable than breath analysis and can confirm or disprove the breathalyser reading. When the officers fail to inform you of this option, or prevent or hinder the test, that omission is one of the most frequent grounds for having the evidence declared null. The defence should always check whether the counter-analysis was offered and whether the driver's wish to request it was respected.

It is wise to request the counter-analysis expressly and to ask for that request to be recorded in the police report. If it later fails to appear there, you can argue that the right was not effectively guaranteed. Being taken to a medical centre for the blood draw should not put you off: it is precisely the route that may establish a level lower than the roadside breathalyser reading and, with it, bring the result below the criminal threshold.

The Double Reading and the Margin of Error

An alcohol test by evidential breathalyser is not done with a single reading. The driver is entitled to a double reading, with a minimum interval between the two (around ten minutes), so that the evolution of the alcohol level can be assessed and anomalous results ruled out.

In addition, every measuring device has a metrological margin of error that must be applied in the driver's favour. This matters especially for readings sitting at the edge of the threshold: if, after deducting the margin of error, the level falls below the criminal limit, the result may cease to be an offence. Verifying the type-approval, calibration and periodic verification of the breathalyser is part of the defence's technical work.

Legal Assistance and the Right to Remain Silent

A common misunderstanding needs clearing up: the right to legal assistance arises on arrest (Article 17.3 of the Constitution and Article 520 of the Criminal Procedure Act), not during a routine roadside stop. While the check and the alcohol test are being carried out you are not, in principle, under arrest but subject to a measure. If the situation leads to arrest, a lawyer must assist you before any statement.

At all times you are covered by the right not to make a statement and not to incriminate yourself (Article 24.2 of the Constitution). You are required to identify yourself and take the tests, but not to explain where you have been, how much you have drunk or where you are coming from. Spontaneous answers given "to cooperate" tend to end up in the police report and turn against you. The sensible course is to be polite, comply with what is mandatory, and stay silent about the facts.

Limits on Searching the Vehicle and the Pat-Down

Not everything is allowed at a checkpoint. There is a clear line between what officers can do without more and what requires consent or judicial authorisation:

• A surface search of the passenger compartment —what is in plain view— does not require a court order.
• Accessing closed or hidden compartments, searching the boot thoroughly or going through private personal effects requires, as a rule, informed consent or judicial authorisation.
• A surface pat-down for safety reasons is lawful, but a more intrusive body search has its own requirements and limits.

A search that goes beyond what is permitted can render the evidence obtained null, by application of Article 11.1 of the Judiciary Act. That is why it is important to know what you can consent to and what you cannot, and to put any irregularity on record.

Refusing the Tests: The Refusal Offence and Disobedience

This is the most costly mistake a driver can make. Refusing to take the legally required alcohol or drug tests when asked by an officer is not a mere traffic infringement: it is the refusal offence under Article 383 of the Criminal Code (CP), punishable by 6 months to 1 year in prison and a driving ban of more than 1 and up to 4 years. That penalty is harsher than the one for the positive reading itself.

Alongside this, serious disobedience to the authority or its officers acting in the course of their duties can amount to Article 556 CP (3 months to 1 year in prison or a fine of 6 to 18 months; mere disrespect under paragraph 2 carries a fine of 1 to 3 months). The practical lesson is blunt: refusing is never advisable, nor is taking a confrontational stance. The right route is to take the test and, if there are grounds, challenge it afterwards on technical lines.

What to Do and What Not to Do at the Stop

In short, these are the steps that best protect your rights:

• Identify yourself and show your documents without arguing. It is mandatory.
• Take the alcohol and drug tests. Refusing is a more serious offence.
• Expressly request the blood counter-analysis if you have tested positive, and ask for it to be noted in the police report.
• Stay silent about the facts: do not explain where you have been or how much you have drunk.
• Do not sign blindly or admit facts without first consulting a lawyer.
• Do not consent to searches beyond the surface level without knowing whether they are warranted.
• Note any irregularities (missing double reading, unverified device, lack of information) that your defence can later rely on.

Defence strategy starts precisely with spotting the flaws in the police report that may lead to the evidence being declared null. The more complete the starting information, the stronger the later work.

Defending Drivers in Madrid and Across Spain

The criminal defence firm Alonso Sala, based at Calle Velázquez 27 in Madrid and covering the whole of Spain, defends drivers in road-safety proceedings: drink-driving, refusal of the tests, drug-driving and driving after the loss of the licence. We review the police report, the breathalyser evidence and whether your rights were respected, in order to build the strongest possible defence.