New York has no set THC limit for drivers, making Marijuana DWAI cases different from alcohol DWI cases based on a BAC reading. Prosecutors instead look at evidence such as driving behavior, officer observations, roadside sobriety tests, a Drug Recognition Expert (DRE) evaluation, and toxicology results. When cannabis and alcohol are involved together, a driver may also face a DWAI-Combination charge.
New York DWI defense attorney Jason Bassett represents drivers facing Marijuana DWAI and other impaired driving charges. He handles cases involving disputed traffic stops, DRE evaluations, toxicology evidence, and other issues related to alleged cannabis impairment. He assists drivers facing DWI and DWAI charges in courts throughout Suffolk County.
This page explains how New York defines Marijuana DWAI and how cannabis impairment may be proven. It also covers DWAI-Combination charges, potential penalties and license consequences, and common defenses.
If you are facing a Marijuana DWAI charge in Suffolk County, call the Law Offices of Jason Bassett, P.C. at (631) 259-6060 for a free consultation.
What Is Marijuana DWAI Under New York Law?
Marijuana DWAI is charged under VTL § 1192(4), which prohibits operating a motor vehicle while impaired by a drug. The prosecution must show that the drug impaired the driver’s ability to operate the vehicle to any extent.
The substance involved must also meet the definition of a “drug” under VTL § 114-a. This definition covers substances listed in Public Health Law § 3306 and expressly includes cannabis and concentrated cannabis. While New York permits adult cannabis use for people 21 and older, driving while impaired by cannabis remains illegal.
The same rule does not automatically apply to every prescription or over-the-counter medication. A medication falls within VTL § 1192(4) only when the substance meets the statutory definition of a drug under VTL § 114-a.
Marijuana DWAI also differs from New York’s alcohol DWI offenses. Per se DWI under VTL § 1192(2) is based on a blood alcohol content (BAC) of .08 or higher, while common-law DWI under VTL § 1192(3) requires proof of intoxication. Marijuana DWAI has no comparable THC threshold, so the prosecution must establish impairment without relying on a specific THC level.
Key Takeaway: Marijuana DWAI requires proof that cannabis or another drug covered by VTL § 114-a impaired the driver’s ability to operate a vehicle. There is no specific THC level that automatically establishes the offense.
How Do Police and Prosecutors Prove Cannabis Impairment?
New York does not set a numeric THC threshold for drivers, so prosecutors cannot establish cannabis impairment through a single laboratory number. Instead, they rely on evidence from the traffic stop, roadside testing, a Drug Recognition Expert (DRE) evaluation when one is conducted, and toxicology when a sample is obtained.
Evidence used in a Marijuana DWAI case can include:
- Officer observations at the stop: Driving behavior, odor, bloodshot eyes, delayed responses, coordination, and statements made by the driver.
- Standardized field sobriety tests: Tests such as horizontal gaze nystagmus, the walk-and-turn, and the one-leg stand, which were developed primarily to assess alcohol impairment.
- DRE evaluation and opinion: A trained law enforcement officer follows a twelve-step protocol that includes vital signs, pupil measurements, muscle tone, divided-attention tests, and other observations before forming an opinion about the drug category involved.
- Toxicology: Blood or urine testing can identify THC or cannabis metabolites in the driver’s system.
Toxicology results require context because cannabis compounds and metabolites can remain detectable after impairment has ended, particularly in urine. A positive result or measured THC concentration does not, by itself, establish the driver’s level of impairment at the time of driving. Prosecutors instead consider toxicology alongside the observations and other evidence collected during the investigation.
What Is DWAI-Combination Under New York Law?
DWAI-Combination is a separate offense under VTL § 1192(4-a). It applies when a driver’s ability is impaired by the combined influence of two or more drugs, or by alcohol together with one or more drugs. In a cannabis case, this can involve cannabis and alcohol or cannabis combined with another drug covered by VTL § 114-a.
The evidence in a DWAI-Combination case can come from several sources. Prosecutors can rely on breath test results, toxicology findings, a DRE evaluation, and officer observations to show the combined effect of the substances. A BAC below the .08 threshold for per se DWI can still serve as evidence when alcohol is one part of the alleged combination.
A prior impaired-driving conviction can also affect the level of the charge. A new DWAI-Combination offense is a Class E felony when the driver has a qualifying conviction under VTL § 1192(2), (2-a), (3), (4), or (4-a) within the preceding 10 years. The prior conviction does not have to involve the same type of substance or the same subdivision.
DWAI-Combination cases can involve evidence related to more than one substance, making the circumstances of the traffic stop and testing important to the case. If you are facing a DWAI-Combination charge in Suffolk County, call the Law Offices of Jason Bassett, P.C. at (631) 259-6060 for a free consultation.
DWI Defense Attorney in Suffolk County, NY – Law Offices of Jason Bassett, P.C.
Jason Bassett, Esq.
Jason Bassett has more than 25 years of experience defending criminal and DWI matters at the state and federal level. He earned his Juris Doctor from Boston College Law School and began his career as an Assistant District Attorney in the Queens County District Attorney’s Office, where he handled prosecutions before moving to the defense side. He is admitted to practice in New York, the United States District Courts for the Eastern and Southern Districts of New York, and the United States Court of Appeals for the Second Circuit.
Attorney Bassett is a member of the National College for DUI Defense, the National Association of Criminal Defense Lawyers, and the New York State Association of Criminal Defense Lawyers, along with the Suffolk County Criminal Bar Association. He handles felony and predicate-offense DWI and DWAI matters personally, from the review of DRE documentation and toxicology records through motion practice and trial.
What Are the Penalties for Marijuana DWAI in Suffolk County?
A first Marijuana DWAI offense under VTL § 1192(4) is an unclassified misdemeanor, unlike a first DWAI-Alcohol offense under VTL § 1192(1). A conviction carries a fine of $500 to $1,000, mandatory surcharges, and up to one year in jail. The court can also impose probation or a conditional discharge when authorized.
Penalties increase when the driver has qualifying prior impaired-driving convictions. A new Marijuana DWAI or DWAI-Combination offense becomes a Class E felony when the driver has one qualifying conviction under VTL § 1192(2), (2-a), (3), (4), or (4-a) within the preceding 10 years. A Class E felony carries a fine of $1,000 to $5,000 and up to four years in prison.
| Offense | Classification | Fine | Maximum Jail/Prison Term | License Action |
|---|---|---|---|---|
| Marijuana DWAI, first offense (VTL § 1192(4)) | Unclassified misdemeanor | $500-$1,000 plus mandatory surcharge | Up to one year | Minimum six-month revocation |
| DWAI-Combination, first offense (VTL § 1192(4-a)) | Unclassified misdemeanor | $500-$1,000 plus mandatory surcharge | Up to one year | Minimum six-month revocation |
| Marijuana DWAI or DWAI-Combination with one qualifying prior conviction within 10 years | Class E felony | $1,000-$5,000 | Up to four years | Minimum one-year revocation; an 18-month minimum applies in specified cases involving an aggravated-DWI predicate |
The presence of a child can also change the level of the offense. Driving in violation of VTL § 1192(4) or (4-a) with a child age 15 or younger as a passenger constitutes aggravated DWI with a child under VTL § 1192(2-a)(b), and a first offense is a Class E felony.
Key Takeaway: A first Marijuana DWAI is an unclassified misdemeanor punishable by up to one year in jail, while a qualifying prior conviction within 10 years can elevate the offense to a Class E felony. The driver’s prior record and the circumstances of the offense can significantly increase the penalties.
How Does a Marijuana DWAI Affect a New York License?
A Marijuana DWAI conviction can result in both criminal penalties and separate DMV consequences. Under DMV rules effective February 16, 2026, an alcohol- or drug-related driving conviction or incident is assigned 11 points. When all 11 points come from a single alcohol- or drug-related incident, that incident is excluded from the ordinary 11-point habitual-or-persistent-violator hearing calculation.
A Marijuana DWAI or DWAI-Combination conviction also results in license revocation rather than a fixed-term suspension. A first conviction carries a minimum six-month revocation. If a new conviction under VTL § 1192(2), (3), (4), or (4-a) occurs within 10 years of a prior conviction under one of those subdivisions, the minimum revocation increases to one year. An 18-month minimum applies in specified cases involving aggravated DWI under VTL § 1192(2-a).
After the revocation period, driving privileges are not restored automatically. The driver must apply for relicensing, and the DMV reviews the driver’s lifetime record. For certain repeat offenders, the DMV uses a 25-year lookback period when determining whether to approve relicensing.
Commercial drivers also face separate CDL consequences. A first conviction under VTL § 1192 can result in at least a one-year CDL revocation, with a longer period in certain hazardous-materials cases. A second qualifying conviction or chemical-test refusal can result in permanent CDL revocation, although the commissioner can consider a waiver after 10 years in limited circumstances. A third qualifying event is not eligible for that waiver, and CDL consequences can apply even when the offense occurred in a personal vehicle.
Key Takeaway: A Marijuana DWAI conviction can result in license revocation in addition to the criminal penalties imposed by the court. Repeat offenses and CDL status can lead to longer or more serious licensing consequences.
What Defenses Apply to Marijuana DWAI in Suffolk County?
Marijuana DWAI defenses often focus on the evidence used to establish impairment. When a DRE evaluation is part of the case, the defense can examine whether the officer followed the twelve-step protocol, properly documented the findings, and maintained the required training and certification. Missing steps, inconsistent records, or findings that do not support the officer’s conclusion can be used to challenge the DRE opinion.
Toxicology evidence can also be challenged. A positive result does not, by itself, establish when cannabis was consumed or the driver’s level of impairment at the time of driving. The defense can examine the timing of the sample, how it was collected and stored, the qualifications of the person who drew the blood, and any gaps in the chain of custody.
The traffic stop and roadside testing provide additional areas for challenge. If police lacked a lawful basis for the stop, the defense can seek suppression of evidence obtained afterward. Field sobriety test performance can also be affected by fatigue, injuries, medical conditions, footwear, or road conditions rather than cannabis impairment.
Key Takeaway: Marijuana DWAI defenses can challenge the DRE evaluation, toxicology evidence, traffic stop, roadside testing, and handling of chemical samples. The specific defenses available depend on the evidence and circumstances of the case.
Speak With a Suffolk County Marijuana DWI Defense Attorney
A Marijuana DWAI charge can lead to criminal penalties and separate DMV consequences that affect a driver’s license. When a qualifying prior conviction is involved, the charge can also carry felony-level penalties.
Jason Bassett handles DWAI-Drug and DWAI-Combination cases from the first court appearance through motions and trial. He appears in Suffolk County District Court, Suffolk County Court in Riverhead for felony matters, and town and village courts throughout the county. These cases can involve DRE documentation, toxicology evidence, chemical testing, and prior impaired-driving convictions.
The Law Offices of Jason Bassett, P.C. represents drivers in Islip, Brookhaven, Huntington, Babylon, Smithtown, Riverhead, Southampton, East Hampton, Southold, and Shelter Island. If you are facing a Marijuana DWAI charge in Suffolk County, call (631) 259-6060 for a free consultation.
Frequently Asked Questions
Does New York have a legal THC limit for driving?
No. Unlike the .08 BAC threshold for per se alcohol DWI, New York has no numeric THC limit for drivers. Prosecutors rely on evidence such as driving behavior, officer observations, roadside testing, DRE findings, and toxicology to establish cannabis impairment.
Can a driver be charged with Marijuana DWAI without a positive blood test?
Yes. A Marijuana DWAI charge under VTL § 1192(4) does not require a positive blood test. Prosecutors can rely on officer observations, roadside testing, DRE findings, and other evidence, while a chemical-test refusal carries separate DMV consequences and can also be used as evidence when statutory requirements are met.
What is the difference between Marijuana DWAI and DWAI-Combination?
Marijuana DWAI under VTL § 1192(4) involves impairment by a drug, including cannabis. DWAI-Combination under VTL § 1192(4-a) involves impairment from two or more drugs, or from alcohol combined with one or more drugs.
Do CDL holders face different consequences for a Marijuana DWAI conviction?
Yes. A Marijuana DWAI conviction can result in separate CDL consequences even when the offense occurred in a personal vehicle. A second qualifying conviction or chemical-test refusal can result in permanent CDL revocation, with a limited waiver available after 10 years in certain cases; a third qualifying event is not eligible for that waiver.
Can a Marijuana DWAI conviction be sealed in New York?
Yes, if the conviction meets New York’s eligibility requirements. CPL § 160.59 allows an application to seal up to two eligible convictions, including no more than one felony, after the required 10-year period. The Clean Slate Act under CPL § 160.57 also provides automatic sealing for eligible misdemeanors after three years and eligible felonies after eight years, subject to statutory requirements.
Is a Marijuana DWAI a misdemeanor or a felony?
A first Marijuana DWAI offense under VTL § 1192(4) is an unclassified misdemeanor punishable by up to one year in jail. A qualifying prior conviction under VTL § 1192(2), (2-a), (3), (4), or (4-a) within the preceding 10 years can elevate a new Marijuana DWAI charge to a Class E felony, punishable by up to four years in prison.