Louisiana DWI penalties — how first through fourth offenses are sentenced

Louisiana DWI penalties (La. R.S. 14:98): (1) First offense DWI: classified as a misdemeanor. Penalties: fine of $300 to $1,000; imprisonment of 10 days to 6 months (the court may suspend the sentence with 48 hours minimum served in jail, in a work release program, or in a substance abuse program); 90-day driver's license suspension; completion of a substance abuse evaluation and treatment program; participation in a driver improvement program; possible ignition interlock device for 6 months; (2) Second offense DWI (within 10 years): classified as a misdemeanor. Penalties: fine of $750 to $1,000; imprisonment of 30 days to 6 months (15 days mandatory minimum); 1-year driver's license suspension; substance abuse treatment mandatory; ignition interlock device required for a period of 2 years after license restoration; (3) Third offense DWI (within 10 years of a prior): classified as a FELONY. Penalties: fine of $2,000; imprisonment at hard labor of 1 to 5 years (1 year mandatory minimum without suspension, probation, or parole); 2-year license revocation; ignition interlock required; (4) Fourth and subsequent offense DWI: classified as a felony. Imprisonment at hard labor of 10 to 30 years (5 years mandatory minimum without suspension, probation, or parole); (5) Aggravating circumstances: DWI with child under 12 in the vehicle (La. R.S. 14:98.1) — felony with additional penalties; DWI resulting in serious bodily injury (La. R.S. 14:39.2 — vehicular negligent injuring while intoxicated) — felony; DWI causing death (La. R.S. 14:32.1 — vehicular homicide) — 5 to 30 years hard labor; (6) Administrative vs. criminal: the license suspension from a DWI arrest is an ADMINISTRATIVE action by the Office of Motor Vehicles — separate from and in addition to the criminal penalties. A driver arrested for DWI who does not request an administrative hearing within 30 days of notice automatically loses their license for the suspension period even if they are later acquitted in the criminal case.

Louisiana implied consent — refusing the breathalyzer and what happens next

Louisiana implied consent law (La. R.S. 32:661-32:668): (1) The implied consent rule: any person who drives, operates, or is in actual physical control of a motor vehicle in Louisiana is deemed to have given consent to a chemical test (breath, blood, or urine) to determine blood alcohol content or presence of controlled substances, when lawfully arrested for DWI. The officer must advise the suspect of their rights under the implied consent law before administering the test; (2) Refusal consequences: if a driver refuses the chemical test, the arresting officer immediately seizes the driver's license, issues a temporary driving permit, and initiates the administrative suspension procedure. First refusal = 1-year license suspension. Second refusal within 10 years = 2-year license suspension. The refusal is also admissible as evidence in the criminal DWI case — the jury can hear that the defendant refused the test; (3) Administrative hearing request: the driver has 30 days from the date of the suspension notice to request an administrative hearing before the Louisiana Office of Motor Vehicles. If no hearing is timely requested, the suspension becomes effective automatically on day 46 after arrest. At the administrative hearing, the driver can contest whether the stop was lawful, whether the arrest was lawful, and whether the implied consent advisement was properly given; (4) The Intoxilyzer 9000 procedure: when a driver does consent to a breath test, the Intoxilyzer 9000 operator must observe the subject for 15-20 minutes before the test, check the device for errors, administer two breath samples within an acceptable range of each other, and generate a printed test record. Defense challenges target each step — operator certification, observation period violations, device calibration records, and print record discrepancies; (5) Portable breath test (PBT) vs. evidential breath test: the roadside portable breath test (PBT) is used by officers during the traffic stop to establish probable cause for arrest but is NOT the evidential test. The PBT result is not admissible to prove the defendant's BAC at trial. The Intoxilyzer 9000 test administered at the police station or in a certified testing environment is the evidential test that can be used at trial; (6) Blood test option: a driver who refuses a breath test may still be required to submit to a blood draw if authorized by a warrant. In vehicular homicide and serious injury cases, law enforcement routinely obtains warrants for blood draws even when the defendant refuses the breathalyzer.

Louisiana vehicular homicide while DWI — La. R.S. 14:32.1 and the penalties

Louisiana vehicular homicide (La. R.S. 14:32.1): (1) What it covers: vehicular homicide in Louisiana is the killing of a human being caused proximately or caused directly by an offender engaged in the operation of any motor vehicle while under the influence of alcoholic beverages or any controlled dangerous substance, or a combination of both. The statute expressly covers situations where the offender was operating the vehicle in a criminally negligent manner; (2) Penalties: imprisonment at hard labor for 5 to 30 years; fines up to $15,000. If the defendant had a prior DWI conviction, the mandatory minimum is 10 years (without parole, probation, or suspension of sentence); (3) Causation requirement: the prosecution must prove that the defendant's intoxication was a proximate or direct cause of the victim's death — not merely that the defendant was intoxicated and a death occurred. In cases where the victim may also have been negligent (running a red light, for example), the causation issue becomes central to the defense; (4) Multiple victims: if more than one person dies in the same incident, the prosecution can charge separate counts of vehicular homicide for each death, with sentences running consecutively; (5) Passenger victim: vehicular homicide can be charged when the victim is a passenger in the defendant's own vehicle — the social host who drives drunk with passengers faces full vehicular homicide liability if a passenger dies; (6) Split trials: because vehicular homicide involves both the DWI elements (the chemical test and intoxication evidence) and the causation elements (accident reconstruction, decedent's toxicology if applicable), these cases frequently involve complex expert testimony. Louisiana courts allow both prosecution and defense experts on accident reconstruction, human factors (intoxication and driving impairment), and causation.

New Orleans DWI enforcement — Mardi Gras, French Quarter, and go-cup culture vs. driving laws

New Orleans DWI enforcement and the open container distinction: (1) Louisiana's unique open container landscape: New Orleans is one of the only cities in the United States that legally allows drinking on public sidewalks and pedestrian areas. The New Orleans Municipal Code allows persons to carry and consume alcoholic beverages in open containers (go-cups) on most public streets and sidewalks in the French Quarter and many other parts of the city. This culture of public drinking is integral to Mardi Gras, Jazz Fest, and the year-round French Quarter tourism economy; (2) The crucial distinction — walking vs. driving: open container laws that permit walking with a drink have absolutely no application to driving. A person walking down Bourbon Street with a rum and Coke is legal. That same person getting into their car and driving is subject to full Louisiana DWI laws — blood alcohol concentration, implied consent, Intoxilyzer 9000 testing, and all criminal penalties. New Orleans tourists who confuse the open sidewalk culture with permissive driving standards are a significant source of DWI arrests in the French Quarter and surrounding areas; (3) Mardi Gras DWI enforcement: Louisiana State Police, New Orleans Police Department, and Jefferson Parish Sheriff's Office maintain heightened DWI enforcement during Mardi Gras season (typically February-March). Sobriety checkpoints are established on major egress routes from New Orleans to Jefferson Parish, St. Tammany Parish, and St. Charles Parish. Uber and Lyft usage in New Orleans during Mardi Gras has significantly reduced drunk driving incidents since 2014; (4) Open container in vehicles: while walking with a drink is legal, an open container of alcohol in a motor vehicle (in the passenger compartment) is illegal in Louisiana under La. R.S. 32:1, even if the driver has not been drinking. The go-cup left in the cupholder from the night before creates probable cause for law enforcement; (5) Baton Rouge I-10 corridor: the I-10 corridor between Baton Rouge and New Orleans is a significant DWI enforcement area — Louisiana State Police Tiger Unit patrols this corridor, and the combination of heavy truck traffic, speeding, and impaired driving makes it a consistent source of felony DWI and vehicular homicide prosecutions; (6) Sobriety checkpoints: Louisiana courts have upheld sobriety checkpoints as constitutional under the Fourth Amendment, applying the federal balancing test from Michigan Dept. of State Police v. Sitz 496 U.S. 444 (1990). Louisiana State Police conduct checkpoints on established guidelines and must follow documentation requirements to ensure admissibility of checkpoint-generated arrests.

Louisiana DWI and CDL — commercial driver license consequences

Louisiana DWI and commercial driver licenses (CDL): (1) Lower BAC threshold for CDL holders: while the standard Louisiana DWI threshold is 0.08% BAC, a CDL holder operating a commercial motor vehicle (CMV) in Louisiana faces a DWI arrest and administrative suspension for a BAC of 0.04% — one-half the standard threshold. This lower threshold applies only when the CDL holder is operating a CMV — not their personal vehicle; (2) Out-of-service provision: a CDL holder found to have a BAC between 0.04% and 0.08% while operating a CMV is placed out of service for 24 hours, even without a DWI arrest. This administrative action does not automatically trigger a license suspension but creates an employment record that trucking companies track; (3) CDL disqualification: a Louisiana DWI conviction (in a CMV or a personal vehicle) results in a 1-year CDL disqualification for a first offense. If the CMV was carrying hazardous materials at the time of the DWI, the CDL disqualification is 3 years. A second DWI conviction results in lifetime CDL disqualification — the CDL holder permanently loses their commercial driving privileges; (4) Louisiana trucking industry impact: Louisiana's petrochemical and construction industries rely heavily on CDL holders for oversize/overweight transport, tanker trucks, and heavy equipment. A single DWI conviction can permanently end a trucking career in Louisiana, making CDL-related DWI defense among the highest-stakes representation a Louisiana criminal defense attorney handles; (5) Federal Motor Carrier Safety Administration (FMCSA): the CDL disqualification is reported by Louisiana to the FMCSA's Commercial Driver License Information System (CDLIS), making the disqualification effective in all 50 states. A Louisiana CDL holder who receives a DWI disqualification cannot simply move to Texas and get a Texas CDL — the disqualification follows them nationally; (6) Drug testing in Louisiana transportation: CDL holders in Louisiana are subject to DOT drug and alcohol testing requirements — pre-employment, random, post-accident, and reasonable suspicion testing. A CDL holder who tests positive for drugs (not alcohol) during a DOT test is removed from safety-sensitive transportation functions and must complete the Return-to-Duty process, independent of any criminal DWI charges.

DUI & Traffic Laws in Louisiana (2026)

Starting a dui & traffic violations issue in Louisiana: suspension pressure, booking timeline, and before a quick answer becomes an expensive one

A cleaner dui & traffic violations page for Louisiana built around suspension pressure, body-cam timing, realistic expectations, and decisions worth slowing down for.

Reviewed January 2026 2 min read Official-source grounded Ver en Espanol En Español

Key Takeaways

Louisiana uses DWI (Driving While Intoxicated) NOT DUI — verify terminology on all documents; La. R.S. 14:98; BAC 0.08% standard; 0.04% for CDL holders operating CMV; 0.02% for under-21 (zero tolerance); Intoxilyzer 9000 = Louisiana's evidential breath test device; portable roadside PBT = probable cause only, NOT admissible at trial
DWI penalties: 1st offense = misdemeanor, 10 days-6 months jail (48hr minimum if suspended), $300-$1,000 fine, 90-day license suspension; 2nd = misdemeanor, 15 days mandatory, $750-$1,000, 1-yr suspension; 3rd = FELONY, 1-5yr hard labor (1yr mandatory), 2-yr revocation; 4th = felony, 10-30yr hard labor (5yr mandatory); vehicular homicide § 14:32.1 = 5-30yr hard labor
New Orleans unique: open container on PUBLIC SIDEWALKS legal (go-cup culture, Mardi Gras); open container in VEHICLE = illegal § 32:1; DRIVING while intoxicated = full DWI liability regardless of sidewalk culture; Mardi Gras = heightened sobriety checkpoints on I-10, US-90, Jeff Parish egress routes; LSP Tiger Unit = I-10 Baton Rouge-New Orleans corridor DWI enforcement
Implied consent § 32:661: refuse test = 1-yr license suspension (2yr for 2nd refusal within 10yr); refusal admissible at trial; 30-day window to request administrative hearing or suspension automatic on day 46; Intoxilyzer 9000 challenge grounds: operator certification, 15-20min observation period, calibration records, print record discrepancies
CDL consequences: BAC 0.04% threshold for CMV operation; 1st DWI = 1-yr CDL disqualification (3yr if hauling hazmat); 2nd DWI = LIFETIME CDL disqualification; reported to federal FMCSA CDLIS (nationwide); petrochemical/construction CDL holders face career-ending consequences; DOT drug/alcohol testing separate from criminal charges

Key Numbers — Louisiana All 50 states →

Filing Deadline 1 year

Fault Rule Pure Comparative

Insurance System At-Fault

Key Statute La. Civ. Code art. 3492

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Louisiana's relationship with alcohol is unlike that of any other American state. New Orleans is one of the few American cities where it is legal to carry an open container of alcohol on a public sidewalk — a tradition born of the French Quarter's centuries-old culture of outdoor entertainment, Mardi Gras revelry, and the 24-hour rhythm of Bourbon Street. The city famously hands out go-cups at bar exits so patrons can continue drinking as they walk. Yet a driver sitting in a vehicle on that same Bourbon Street — even parked — can face a Driving While Intoxicated charge under La. R.S. 14:98 if law enforcement determines they were in actual physical control of the vehicle while intoxicated. Louisiana's criminal code uses the term DWI (Driving While Intoxicated), not DUI — a distinction that matters when searching prior records, reviewing court documents, or filling out licensing applications. The blood alcohol concentration threshold is 0.08 percent for adults, 0.04 percent for commercial driver's license holders operating commercial vehicles, and 0.02 percent for drivers under the age of twenty-one under Louisiana's zero tolerance law at La. R.S. 32:661.

The Intoxilyzer 9000 is Louisiana's state-approved breath alcohol testing device, used by Louisiana State Police and parish law enforcement agencies for evidential breath testing in DWI arrests. Louisiana law requires that the Intoxilyzer 9000 be operated by a certified operator, that the device be calibrated and maintained according to the Louisiana Department of Health protocols, and that the testing procedure follow specific steps. Defense attorneys in Louisiana frequently challenge Intoxilyzer 9000 results on the grounds of operator certification lapses, device calibration records, or deviation from the testing protocol. Blood tests are also used in Louisiana DWI cases — particularly for vehicular homicide and serious injury cases under La. R.S. 14:32.1 — and challenge of blood draw procedures, chain of custody, and laboratory analysis are important defense avenues. Louisiana's implied consent law (La. R.S. 32:661-32:668) provides that any person who drives on Louisiana's public roads is deemed to have consented to a chemical test of their blood, breath, or urine. Refusal of the test results in an automatic license suspension of 1 year for a first refusal and 2 years for a second refusal within 10 years.

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