How Do Cops Test for Weed in a DUI?

August 25, 2026 | Drug DUI,DUI

A marijuana DUI investigation looks very different from an alcohol DUI investigation. Unlike alcohol, no roadside device can accurately measure a driver’s level of marijuana impairment.  Instead, law enforcement officers rely on a combination of observations, field sobriety tests, drug recognition evaluations, and chemical testing when they suspect someone is driving under the influence of… read more

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Do Breathalyzers Detect Weed?

August 25, 2026 | Drug DUI,DUI

The short answer is no. Traditional alcohol breathalyzers cannot detect THC, the psychoactive compound in marijuana.  Instead, Arizona law enforcement relies on other forms of evidence when investigating suspected marijuana DUI offenses, including field sobriety testing, blood testing, and observations made during the traffic stop. Arizona Revised Statutes § 28-1381 governs DUI offenses, including those… read more

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What Is the Legal Limit for THC While Driving?

August 25, 2026 | DUI

Many drivers assume there is a legal THC limit for driving similar to the 0.08 BAC limit for alcohol. In reality, the answer is much more complicated. There is no universal federal standard, and states use different approaches when prosecuting marijuana-related DUI offenses. Arizona has some of the country’s strictest marijuana DUI laws, and being… read more

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Can You Get a Pilot’s License with a DUI?

August 12, 2026 | DUI

In many cases, you can get a pilot’s license with a DUI, but it can create serious problems. The Federal Aviation Administration (FAA) does not automatically deny every pilot or student pilot because of one DUI arrest or DUI conviction. However, the FAA treats alcohol-related driving events as safety issues, and pilots have strict reporting… read more

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How Long After You Smoke Can You Get a DUI in Arizona?

July 25, 2026 | Drug DUI

There is no single answer to how long after you smoke you can get a DUI in Arizona. There is no safe waiting period and no fixed number of hours after smoking, vaping, or consuming marijuana that protects a driver from a DUI charge.  The impairing effects usually fade within a few hours, but that… read more

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