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Contran updates Brazil's Lei Seca enforcement rules
The National Traffic Council (Contran) has implemented new regulations for 'Lei Seca' (Drunk Driving Law) enforcement across Brazil. Resolution No. 1.031/2026 updates procedures that have been in place since 2013, introducing a preliminary screening phase known as a 'pre-test' or passive alcohol test.
This screening process is indicative and cannot be used as the sole basis for a fine or legal charge. If a pre-test indicates the presence of alcohol or other substances, drivers must undergo confirmatory testing via a traditional breathalyzer (etilômetro) or through the observation of at least two physical signs of impaired psychomotor capacity. The new rules also allow for the use of certified equipment, such as 'drogômetros', to detect various psychoactive substances through oral fluid analysis.
While the regulation is now in effect, the full implementation of updated inspection forms and infraction codes will take 60 days. The Federal Highway Police (PRF) noted that while these rules provide the legal framework for future technology integration, current highway enforcement procedures remain largely unchanged. Refusal to undergo testing continues to carry severe penalties, including heavy fines and license suspension.
Entities
Autoridade Nacional de Segurança Rodoviária · Brasil · Brazil · Conselho Nacional de Trânsito · Contran · Detran-MS · Inmetro · Polícia Rodoviária Federal · Portugal
Claims
What the coverage asserts, and how many sources carry each claim.
- [○ 1 SOURCE] A positive screening result must be followed by confirmatory procedures to apply fines or prove influence. www.serranewsrj.com.br
- [● 2 SOURCES] Contran has issued a new resolution regarding 'Lei Seca' regulations. www.serranewsrj.com.br · santaportal.com.br
- [● 2 SOURCES] New regulations allow for the use of screening equipment to identify alcohol and other psychoactive substances in drivers. www.serranewsrj.com.br · santaportal.com.br
- [○ 1 SOURCE] Driving under the influence becomes a crime if the breathalyzer result is 0.34 mg/L or higher. www.naoviu.com.br
- [● 2 SOURCES] Changes to inspection forms and infraction codes will take effect in 60 days. www.naoviu.com.br · paraiba.com.br
- [● 3 SOURCES] Contran published Resolution No. 031/2026 to update Lei Seca enforcement procedures. www.naoviu.com.br · paraiba.com.br · www.portaldotransito.com.br
- [○ 1 SOURCE] The new rules allow for the use of devices to detect psychoactive substances other than alcohol. www.portaldotransito.com.br
- [● 2 SOURCES] Blood tests or laboratory procedures are now mandatory in traffic accidents involving fatalities to detect alcohol or psychoactive substances. www.naoviu.com.br · www.portaldotransito.com.br
- [● 2 SOURCES] Pre-test results are indicative only and cannot alone result in a fine or criminal charges. www.naoviu.com.br · paraiba.com.br
- [● 3 SOURCES] The new resolution regulates the pre-test, also known as a passive alcohol test, for screening purposes. www.naoviu.com.br · paraiba.com.br · www.portaldotransito.com.br