Alcohol controlThailand

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189. Alcohol control

An alcohol control is a roadside check used to determine whether a driver has consumed alcohol and whether the legal alcohol limit has been exceeded. Police may use a screening device, breath test, breath analysis or, in some situations, a blood test. The exact procedure and legal limits vary between countries. Drivers must normally cooperate with authorised testing, and refusing a lawful alcohol test can itself lead to penalties.

What is an alcohol control?

An alcohol control is a police check used to determine whether a driver has consumed alcohol and whether the applicable legal limit has been exceeded.

How is alcohol tested at the roadside?

Police commonly use a breath-testing device. Depending on the result and local procedure, a more precise breath analysis or blood test may follow.

Can police test a driver who does not appear drunk?

In many countries, yes. Police may conduct random or routine alcohol checks without first observing obvious signs of intoxication.

Can you refuse an alcohol test?

Rules vary by country, but refusing a legally required alcohol test can itself be an offence and may result in penalties or an immediate driving restriction.

Can a blood test be used to measure alcohol?

Yes. A blood test may be used when breath testing is impossible, disputed or required by the applicable legal procedure.

Can you be prevented from driving after an alcohol control?

Yes. If the result exceeds the applicable limit, authorities may impose an immediate temporary driving prohibition in addition to any later fine, licence suspension or court proceedings.

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