Brazil expands traffic enforcement with drug detection technology

Brazil is implementing significant updates to its traffic enforcement laws through CONTRAN Resolution No. 031/2026. This new regulation expands the scope of the ‘Lei Seca’ (Dry Law) by allowing authorities to use specialized equipment, known as ‘drogômetros’, to detect psychoactive substances beyond alcohol during roadside inspections.

The ‘drogômetro’ uses saliva samples to identify the recent consumption of substances including cocaine, amphetamines, MDMA, LSD, cannabis (Delta-9-THC), fentanyl, and others. While the device provides qualitative results to assist in screening, it does not measure concentration or determine the exact time of consumption. Enforcement may also rely on observing signs of psychomotor impairment and supplementary evidence such as video.

Additionally, in Rio Grande do Sul, new requirements for driver's licenses will take effect in September. Candidates applying for their first license in categories A (motorcycle) and B (car) must now undergo a toxicological exam. This requirement, previously reserved for professional drivers in categories C, D, and E, involves testing hair or body hair to detect drug use within the last 90 days. The issuance of a driver's permit is now contingent upon a negative result registered by Senatran-accredited laboratories.