Cannabis DUI Laws in Maryland

Maryland (MD)Effect-Based Standard

Prosecutors must prove the driver was actually impaired by cannabis. There is no specific THC blood level threshold.

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DUI Law Details

THC Limit
None (effect-based)
legal threshold
Testing Method
Blood, field sobriety, DRE evaluation
authorized methods
Implied Consent
Yes
required for licensed drivers
First Offense Penalty

Up to 1 year in jail, fines up to $1,000, 6-month license suspension

Test Refusal Penalty

270-day license suspension

Overview

Maryland follows an effect-based approach to cannabis DUI enforcement. The state legalized recreational cannabis in 2023 but has not established a per se THC driving limit. Prosecutors must prove actual impairment.

Maryland law enforcement uses field sobriety tests, Drug Recognition Expert evaluations, and chemical testing to establish cannabis impairment. The state has invested in expanding its DRE program alongside legalization to better address cannabis-impaired driving.

Key Facts

Frequently Asked Questions

Does Maryland have a THC driving limit?+
No. Maryland does not have a per se THC limit. Law enforcement must demonstrate actual impairment through observations, field sobriety tests, and chemical testing.
What are the penalties for a first cannabis DUI in Maryland?+
A first offense carries up to 1 year in jail, fines up to $1,000, and a 6-month license suspension.
Has Maryland changed DUI laws since legalizing cannabis?+
Maryland has expanded its Drug Recognition Expert program since legalization but has not established a per se THC limit. The effect-based standard remains in place.

Related State DUI Laws

Explore cannabis DUI laws in other states with similar regulations or neighboring jurisdictions.

VA
Virginia
Effect-Based Standard
DE
Delaware
Zero Tolerance
PA
Pennsylvania
Per Se THC Limit
DC
District of Columbia
Effect-Based Standard

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Disclaimer: The information on this page is provided for educational and informational purposes only and does not constitute legal advice. Cannabis remains illegal under US federal law. Maryland DUI laws and regulations are subject to change and may vary by local jurisdiction. THC limits, penalties, and testing methods described here are based on publicly available information and may not reflect the most current regulations. Always verify current laws with official Maryland state resources and consult with a qualified attorney for legal guidance. Cannabismarketcap does not guarantee the accuracy or completeness of any information presented.