As cannabis use becomes more common in Minnesota, it’s important for residents to understand how DUI laws apply. Driving under the influence of cannabis is illegal in the state, and Minnesota law takes a zero-tolerance approach to impaired driving meaning you can be charged with a DUI if you are found to be under the influence of marijuana while operating a vehicle, regardless of the amount consumed.
Minnesota law (Minn. Stat. 169A.20) prohibits driving while impaired by any controlled substance, including cannabis. Unlike alcohol, Minnesota does not have a specific legal THC limit. Instead, law enforcement officers assess whether a driver is impaired based on behavior, driving patterns, and physical or cognitive signs of impairment. In other words, even if a driver has used cannabis but feels alert, they can still face DUI charges if an officer determines their ability to operate a vehicle safely is compromised.
When suspected of driving under the influence of cannabis, police officers may rely on several methods to determine impairment:
Since Minnesota does not use a specific THC blood concentration as the legal standard, proving impairment is largely based on observed effects and officer testimony, making cannabis DUI cases more nuanced and complex than alcohol-related DUIs.
The consequences for a cannabis DUI are the same as those for alcohol-related DUIs. First-time offenders may face:
Repeat offenders face escalating penalties, including longer license suspensions, higher fines, and possible jail time. In addition to these legal consequences, a DUI conviction can have long-term effects, such as:
Because Minnesota does not have a measurable THC threshold, legal defenses often focus on challenging the evidence of impairment. Possible defense strategies may include:
An experienced DUI attorney can evaluate the details of a case and build a defense tailored to the unique challenges of cannabis impairment claims.
The best way to avoid a cannabis DUI is to never drive while impaired. Even if you feel alert, cannabis can slow reaction times, impair coordination, and affect judgment. Planning ahead is essential consider rideshares, public transportation, or a designated driver if you plan to consume cannabis. Keep in mind that edibles and other delayed-consumption methods may take longer to show effects, meaning you could still be impaired hours after use.
Minnesota takes a zero-tolerance approach to cannabis and driving, emphasizing safety and the prevention of impaired operation of vehicles. While there is no legal THC limit, driving under the influence of cannabis carries the same serious consequences as alcohol-related DUIs. Understanding your rights, knowing how impairment is assessed, and avoiding driving while under the influence are essential for protecting yourself and others on the road. If you are charged with a cannabis DUI, consulting a skilled DUI attorney can help protect your rights, explore your legal options, and build the strongest possible defense.
