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Commercial Driver DWI Defense in Houston, TX
What Makes a Commercial Driver DWI Different?
Texas law holds commercial drivers to stricter standards than non-commercial drivers. Under Texas Penal Code § 49.04, operating any motor vehicle while intoxicated is a DWI. But for commercial drivers, the legal threshold is 0.04 BAC when operating a commercial motor vehicle (CMV), compared to 0.08 BAC for regular drivers.
Because of this lower threshold, even a small amount of alcohol can jeopardize a commercial driver’s freedom, career, and ability to earn a living.
Key Elements the State Must Prove
- Operation of a commercial motor vehicle in a public place;
- Intoxication, defined as 0.04 BAC or loss of normal use of faculties;
- The defendant held a commercial driver’s license (CDL) at the time.
Penalties & CDL Consequences
Criminal Penalties
For a first-offense DWI as a commercial driver:
- Class B misdemeanor (unless enhanced);
- 3 to 180 days in county jail;
- Fine up to $2,000;
- Possible enhancements for BAC ≥ 0.15, child passenger, or accident-related injuries.
CDL-Specific Penalties
The most devastating consequence for commercial drivers is the effect on their CDL. Under federal and state law:
- 1-year disqualification from driving a CMV for a first DWI;
- Lifelong CDL disqualification for a second DWI conviction or refusal;
- Even an ALR suspension (civil license action) can disqualify your CDL.
See Texas DPS CDL Disqualification Rules.
Employment & Insurance Impact
- Loss of commercial driving job
- Difficulty obtaining future CDL employment
- Increased insurance costs or denial of coverage
Defenses to Commercial Driver DWI
Stop & Arrest Challenges
We examine whether law enforcement had probable cause to stop or arrest. Illegal stops can result in evidence suppression.
Breath & Blood Testing Issues
We challenge Intoxilyzer calibration, maintenance, and administration, as well as blood draw procedures and lab analysis. A faulty reading at or near the 0.04 BAC threshold is especially critical.
Field Sobriety Tests (FST) Issues
Standardized field sobriety tests are subjective and prone to error. We scrutinize how tests were given and whether outside factors (fatigue, work conditions, injuries) affected results.
ALR Hearings as Defense Tools
The ALR hearing process is not only about license suspension—it can also lock in officer testimony and uncover evidence that may weaken the criminal case.
Immediate Steps After an Arrest
- Request an ALR hearing within 15 days to contest license suspension.
- Protect your CDL: even one DWI can disqualify you for a year.
- Do not discuss your case with employers or others without legal advice.
- Gather work records, driving logs, medical info, and witness contacts that may help your defense.
Why Choose Cory Roth Law Office
Focused on Commercial Driver Defense
- Fast ALR action to fight license suspensions and CDL disqualifications
- Technical challenges to breath, blood, and field sobriety testing
- Tailored defense strategy for drivers whose livelihood depends on their CDL
Houston Insight
We know Harris County courts, DPS procedures, and how a commercial DWI affects both your criminal record and your professional life.
Related Houston Practice Areas
- Houston DWI Defense Attorney
- Houston Felony DWI Lawyer
- Houston First-Offense DWI Attorney
- Houston DWI With Child Passenger Defense Attorney
- Houston State Jail Felonies Attorney
Speak with Cory Roth Law Office Today
If you are a commercial driver facing a DWI charge, your career, license, and freedom are at stake. We act quickly to protect your CDL, fight the evidence, and defend your future.
Contact Cory Roth Law Office to schedule a confidential consultation.
When your livelihood is on the line, trust a defense built on precision, persistence, and deep knowledge of commercial driver DWI defense. Start your defense today.
A skilled defense attorney can challenge the stop, testing procedures, and evidence; fight the ALR suspension; and build strategies to protect your CDL and future employment opportunities.
Almost always. Employers often terminate drivers after a DWI, and insurance carriers may refuse coverage, making it difficult to find new employment.
No. While non-commercial drivers may qualify for an occupational license, CDL holders cannot use one to operate a commercial vehicle during suspension or disqualification.
Yes. Refusal can trigger an ALR suspension and CDL disqualification under Texas and federal law, even before your criminal case is resolved.
A second conviction can result in a lifetime disqualification of your CDL, making it nearly impossible to continue working in commercial driving.
Yes. A first DWI conviction or ALR suspension typically results in a 1-year CDL disqualification, even if you were not driving a commercial vehicle at the time.
Commercial drivers are held to a stricter standard of 0.04 BAC while operating a commercial motor vehicle, compared to 0.08 BAC for non-commercial drivers.