Vol. L · No. I FOL. XLIXArticles
Avery & Avery, Esqs. Ridgefield, NJ John S. Avery, Esq.
DUI Versus DWI — A Lawyer's State-by-State Walkthrough
By John S. Avery, Esq.
The labels “DUI” and “DWI” cause more confusion than almost any other piece of legal terminology. They mean different things in different states. Some states use only one. Some states use both, with different meanings. New Jersey uses “DWI” — driving while intoxicated — under N.J.S.A. 39:4-50. But you’ll hear “DUI” used colloquially even in NJ, and it shows up in radio advertisements and TV slogans for defense attorneys. This post walks through the actual state-by-state usage and explains why the NJ practitioner uses “DWI” in formal practice.
General-information walkthrough. Not legal advice. Free consultation: (201) 943-2445.
What the Labels Actually Mean
DUI — Driving Under the Influence
“Driving Under the Influence” is the older formulation. It typically refers to operation of a motor vehicle under the influence of alcohol or a controlled substance. Most states that use “DUI” encompass both alcohol and drug impairment under the same label.
DWI — Driving While Intoxicated (or Impaired)
“Driving While Intoxicated” is the formulation used in NJ and several other states. The “intoxicated” terminology emphasizes the impairment standard — you don’t have to be drunk in a colloquial sense; you only need to be impaired by alcohol or drugs.
Some states use “Driving While Impaired” — same acronym, slightly different wording, similar meaning.
OUI / OWI — Operating Under the Influence / While Intoxicated
A handful of states (Maine, Massachusetts) use “OUI.” Wisconsin uses “OWI.” Same general concept; different terminology.
State-by-State Usage Snapshot
A non-exhaustive snapshot:
- NJ, NY, TX: DWI is the formal term
- CA, FL, GA, PA: DUI is the formal term
- AZ, IL, OH: DUI is formal; some sub-categories
- MA, ME: OUI
- WI: OWI
- MN, NM: DWI
Some states use both labels for different sub-offenses. In NJ, “DWI” is the only statutory term. N.J.S.A. 39:4-50 uses “under the influence of intoxicating liquor, narcotic, hallucinogenic or habit-producing drug” — there is no separate “DUI” offense.
Why It Matters
For NJ practice, the label matters in three contexts:
1. Slug and Search
People search for “DUI lawyer NJ” much more than “DWI lawyer NJ” even though the formal NJ term is DWI. NJ defense attorneys commonly use both terms in marketing for that reason. Practice URLs in this firm’s site use “dwi” structurally with “dui” appearing in content where search vocabulary requires it.
2. Out-of-State Conviction Translation
A NJ resident convicted of DUI in another state may face NJ MVC consequences via the Driver License Compact (N.J.S.A. 39:5D-1 et seq.) and the Interstate Driver License Compact processing of out-of-state convictions. A FL DUI is treated as a NJ DWI for license-action purposes; the conviction carries similar surcharges.
3. Sentencing Math on Out-of-State Priors
For NJ sentencing on a current DWI matter, an out-of-state DUI prior may count as a prior for stepping up the present sentence. N.J.S.A. 39:4-50(a)(3) specifies the substantial-equivalence analysis for prior-conviction status.
NJ DWI in 200 Words
NJ’s DWI statute, N.J.S.A. 39:4-50, prohibits operation of a motor vehicle (a) while under the influence of intoxicating liquor, narcotic, hallucinogenic or habit-producing drug, or (b) with a blood alcohol concentration of 0.08% or more. The two prongs are independent — the State can prove either to convict.
Penalties depend on prior-conviction status, BAC level, and date of offense. A first-offense conviction with BAC 0.08-0.10% carries a fine of $250-$400, up to 30 days in county jail, and an ignition interlock for 3 months. A first-offense conviction with BAC at 0.10% or above adds a license forfeiture or extended interlock period. A first-offense conviction with BAC at 0.15% or above triggers mandatory ignition interlock during license forfeiture (4-6 months) plus 9-15 months post-restoration.
Surcharges of $1,000 per year for three years apply on conviction.
Frequently Asked Questions
Is DUI the same as DWI in NJ?
NJ does not have a separate “DUI” offense. The statutory offense is “DWI” under N.J.S.A. 39:4-50. In casual usage, the terms are sometimes used interchangeably.
What about drug DWI in NJ?
The same statute, N.J.S.A. 39:4-50, covers drug-impairment. Practitioners sometimes call this “drugged driving” or “drug DWI.” There is no separate “DUI for drugs” offense.
If I’m convicted of DUI in another state, will it count in NJ?
Yes, generally. The Driver License Compact handles license action on out-of-state convictions. NJ sentencing courts will treat a substantially-equivalent out-of-state DUI as a prior for stepping up the present matter.
Does the label affect my insurance?
No. Insurance carriers look at the underlying conviction, not the label. A DWI in NJ and a DUI in NJ would carry identical insurance consequences (since they refer to the same offense).
Free Consultation
For NJ DWI defense:
- Call: (201) 943-2445
- Office: 559 Bergen Boulevard, 2nd Floor, Ridgefield, NJ 07657
- Online: Free consultation request