Is it illegal to drive while high on marijuana?
Strictly illegal in all 50 states via DUI/DWI and DUID laws.
Driving under the influence of marijuana is illegal throughout the United States, regardless of whether the state has legalized recreational or medical use. Law enforcement uses field sobriety tests and blood/urine analysis to establish impairment or the presence of THC. While some states require proof of actual impairment, others maintain 'per se' laws where any detectable level of THC in the bloodstream constitutes a crime. Even with a valid medical prescription, the act of operating a vehicle while impaired remains a punishable offense.
RELEVANT LAWS
- Uniform Vehicle Code § 11-902Driving while under the influence
- California Vehicle Code § 23152Driving under the influence of any drug
- RCW 46.61.502Washington State 5 nanogram per se THC limit
- 23 U.S.C. § 154Federal Open Container Requirements
POTENTIAL PENALTIES
- Mandatory license suspension or revocation ranging from 90 days to one year
- Criminal fines typically ranging from $500 to $2,500 for first offenses
- Possible jail time of 48 hours to 6 months depending on the jurisdiction
- Required enrollment in drug education or rehabilitation programs
JURISDICTION
While all states ban impaired driving, thresholds vary between 'zero tolerance' states and those requiring a specific THC blood concentration (nanograms).
Some states employ 'Drug Recognition Experts' (DREs), which are specifically trained police officers who can testify as experts on whether a driver is high based on eye tremors and physical reactions.
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