Since Minnesota legalized recreational cannabis in August 2023, adults age 21 and older have been allowed to possess and use cannabis within the limits of state law. What has not changed is the prohibition against driving while impaired. Legal cannabis use does not make it legal to operate a vehicle while under the influence.
Minnesota’s driving while impaired (DWI) laws apply to more than alcohol. Driving while impaired by drugs is also prohibited, and cannabis legalization did not create an exception. Understanding the difference between legal cannabis use and impaired driving can help Lake Elmo drivers recognize when cannabis possession or use may create a separate legal issue behind the wheel.
What Does Minnesota Cannabis DWI Law Mean for Lake Elmo Drivers?
Minnesota law prohibits operating a motor vehicle while under the influence of cannabis or a cannabis-related product. That can include different forms of cannabis, such as flower, edibles, and concentrates. The important issue in a cannabis DWI case is not simply whether someone legally possessed or consumed cannabis, but whether the person was under the influence while operating the vehicle.
Minnesota has not established a per se THC concentration limit comparable to the 0.08 alcohol concentration standard. THC, or tetrahydrocannabinol, is the primary psychoactive compound in cannabis. As a result, a cannabis DWI generally requires evidence that the driver was under the influence rather than proof that the driver’s THC concentration exceeded a particular numerical threshold.
This distinction matters because THC can remain detectable after its impairing effects have diminished. The presence of THC therefore does not necessarily establish when cannabis was consumed or whether a person was impaired while driving. In a cannabis DWI case, the circumstances surrounding the stop, observations of the driver, chemical testing, and other evidence may all be relevant.
How Do Officers Detect Cannabis Impairment on the Road?
Unlike alcohol, cannabis impairment is not evaluated through a roadside breath test that provides a numerical alcohol concentration. Instead, law enforcement may rely on several types of evidence when investigating suspected drug-impaired driving.
Depending on the circumstances, that evidence may include:
- The officer’s observations of the driver’s behavior, speech, coordination, or appearance.
- The driver’s statements about cannabis or other drug use.
- Performance on field sobriety tests.
- An evaluation by a specially trained officer.
- Chemical testing and other evidence collected during the investigation.
What Is a Drug Recognition Evaluation?
A Drug Recognition Expert (DRE) is a law enforcement officer with specialized training in recognizing signs that may be associated with drug impairment. A DRE evaluation uses a structured process involving physical observations, interviews, and other assessments intended to help determine whether impairment may be related to drugs rather than alcohol.
A DRE evaluation is evidence, but it does not automatically establish that a driver was impaired. A defense attorney may review how the evaluation was performed, whether the observations were documented consistently, and how those observations compare with other evidence in the case.
Minnesota’s implied consent law may also apply when an officer has probable cause to believe a person was driving while impaired and additional statutory requirements are satisfied. In general, implied consent refers to Minnesota’s legal framework governing chemical testing for suspected impaired driving. Refusing a legally required chemical test can result in separate criminal and driver’s license consequences, so the circumstances surrounding a test request can be important to a DWI case.
What Does Minnesota’s Cannabis Open-Package Law Require?
Cannabis legalization also created rules governing how cannabis can be transported in a motor vehicle. Legal possession does not mean cannabis can be stored anywhere in a vehicle without restriction.
Minnesota’s open-package law prohibits possessing an open cannabis package in specified areas of a motor vehicle while the vehicle is on a street or highway, subject to statutory exceptions. Depending on the circumstances, lawful transportation may require cannabis to remain in compliant packaging or to be kept in an area of the vehicle where the open-package prohibition does not apply.
This issue is separate from impaired driving. A person does not necessarily have to be impaired to face a cannabis open-package allegation. For that reason, drivers transporting cannabis should understand both the rules governing possession in a vehicle and the separate prohibition against driving while impaired.
What Can Happen After a Cannabis DWI Charge?
Cannabis-impaired driving is prosecuted under Minnesota’s DWI law. The degree of the offense and the potential consequences depend on the circumstances of the case and any applicable aggravating factors, such as certain prior impaired-driving incidents.
Depending on the charge and the driver’s record, potential consequences can include:
- Criminal fines and possible jail time.
- Driver’s license consequences.
- Additional requirements associated with repeat impaired-driving offenses.
- A criminal record following a conviction.
A repeat offense or a case involving qualifying aggravating factors can carry more serious consequences than a first-time offense. Because Minnesota DWI law distinguishes among different degrees of impaired-driving offenses, the specific charge and the person’s prior record must be reviewed before determining what penalties may apply.
A cannabis DWI case may also raise factual questions that differ from those in an alcohol-related case. A lawyer can review why the traffic stop occurred, what the officer observed, how field sobriety or DRE procedures were performed, whether chemical testing complied with applicable requirements, and what the evidence actually shows about impairment at the time of driving.
If you are facing a cannabis-related DWI charge in Lake Elmo, Woodbury, or elsewhere in Washington County, understanding the evidence and the specific charge against you can help you make informed decisions about what comes next. Coodin Law Office, LLC is a Minnesota law office that represents people facing DWI and other criminal charges. Contact our law office to discuss your situation with an attorney.