Protecting Your CDL: Commercial DUI Defense in Kentucky

For commercial driver’s license (CDL) holders, a DUI charge is a career-threatening event. Even a DUI conviction in your personal vehicle can result in disqualification of your CDL, ending your ability to earn a living. Clark + Harris provides specialized DUI defense representation for CDL holders in Lexington, Louisville, and throughout Kentucky. We understand what is at stake for commercial drivers and work to protect their livelihoods.

Lower BAC Threshold for Commercial Drivers

While the general per se DUI limit in Kentucky is .08 BAC, commercial drivers face a stricter standard. Under KRS 189A.010(1)(b), it is unlawful for a person operating a commercial motor vehicle to do so with a BAC of .04 or higher. This lower threshold reflects the greater responsibility placed on commercial drivers and the danger posed by impairment in large vehicles.

Federal regulations under 49 CFR § 392.5 also establish a .04 BAC limit for commercial drivers and prohibit consumption of alcohol within 4 hours before driving a commercial vehicle. These federal regulations apply across state lines and can result in federal enforcement actions in addition to state prosecution.

CDL Disqualification for DUI

Under KRS 281A.210 and federal law, DUI convictions result in mandatory CDL disqualification:

First DUI Offense (in any vehicle): 1-year CDL disqualification
First DUI Offense in a commercial vehicle transporting hazardous materials: 3-year disqualification
Second DUI Offense (in any vehicle, ever): Lifetime disqualification

Critically, these disqualifications apply even for DUI convictions in personal (non-commercial) vehicles. A driver convicted of DUI on the weekend in their personal vehicle will lose their CDL for a year, even though the offense had nothing to do with commercial driving.

The lifetime disqualification for a second DUI is particularly devastating. However, under specific circumstances, CDL holders may apply for reinstatement after 10 years under KRS 281A.210(5). Clark + Harris can advise whether reinstatement may be available in your situation.

Other CDL-Disqualifying Offenses

In addition to DUI, numerous other offenses result in CDL disqualification:

Refusal of chemical testing
Leaving the scene of an accident
Using a commercial vehicle to commit a felony
Driving a commercial vehicle with a suspended, revoked, or canceled CDL
Causing a fatality through negligent operation of a commercial vehicle
Using a commercial vehicle in a felony involving controlled substances

Each of these can result in disqualification of one year, three years, or life, depending on the offense and prior history.

Federal Notification Requirements

Under federal regulations, CDL holders are required to notify their employer within 30 days of any traffic conviction, except for parking violations. This notification requirement applies to out-of-state tickets as well as in-state convictions. Additionally, any driver whose privileges are suspended, revoked, or canceled must notify their employer by the end of the next business day.

Failure to comply with these notification requirements is itself grounds for disqualification and employer discipline.

Defense Strategies for CDL DUI Cases

Given the severe consequences of CDL-related DUI convictions, aggressive defense is critical. Clark + Harris develops comprehensive defense strategies in every CDL DUI case:

Challenging the Stop: Commercial vehicles are subject to various regulatory stops and weigh station inspections. We examine whether the officer had legal basis for the stop or inspection.

Challenging Field Sobriety Tests: We scrutinize the administration of field sobriety tests, which are subjective and require specific protocols. Many commercial drivers have medical conditions, physical limitations, or job-related issues that can affect test performance.

Challenging Breathalyzer Results: The .04 BAC threshold for commercial drivers makes breathalyzer accuracy particularly critical. Calibration issues, machine errors, and physiological factors can result in readings that exceed .04 when actual BAC is lower.

Negotiating Amended Charges: In appropriate cases, we work to negotiate amended charges that preserve CDL privileges. For example, in some jurisdictions, reduction to reckless driving may preserve CDL privileges where DUI conviction would not.

Challenging Disqualification Proceedings: CDL disqualification proceedings may have independent challenges separate from the underlying criminal case.

Off-Duty DUI — Personal Vehicle

A DUI conviction in your personal vehicle has the same disqualifying effect on your CDL as a commercial vehicle DUI. This means that if you are a CDL holder charged with DUI in your personal car, your career is on the line even though the offense had nothing to do with your commercial driving.

This reality makes experienced defense representation essential for CDL holders facing any DUI charge. Clark + Harris approaches every CDL-holder DUI case with full recognition of what is at stake.

Major Traffic Offenses and CDL

Beyond DUI, “serious traffic violations” can affect CDL privileges:

Speeding 15 or more miles over the limit
Reckless driving
Improper or erratic lane changes
Following too closely
Violations related to fatal accidents
Driving a commercial vehicle without a CDL

Two serious traffic violations within three years result in a 60-day disqualification. Three violations within three years result in a 120-day disqualification.

Clark + Harris CDL DUI Defense

We understand how much is at stake when a CDL holder faces DUI charges. Our firm represents truck drivers, delivery drivers, bus drivers, and other commercial drivers throughout Kentucky. We know the federal and state regulations, the CDL disqualification process, and the strategies that can protect our clients’ careers.

Call for an Immediate Consultation

If you are a CDL holder charged with DUI in Kentucky, time is critical. Call Clark + Harris at 859-474-0001 for a confidential consultation. We serve CDL drivers throughout Kentucky from our offices in Lexington and Louisville.

Related Resources

If this information applied to your situation, the following Clark + Harris guides may also be helpful:

Legal Resources

Kentucky DUI laws are codified in KRS Chapter 189A of the Kentucky Revised Statutes. For information about license suspensions and administrative hearings, visit the Kentucky Transportation Cabinet. For court procedures, see the Kentucky Court of Justice. If you are facing DUI charges, contact Clark + Harris PLLC at (859) 474-0001.

Commercial DUI in Kentucky (CDL Holders) — Clark + Harris