For most people, a DUI is a serious legal problem. For a commercial driver, it's a threat to the whole career. Your commercial license isn't just a card in your wallet. It's how you feed your family, and a DUI can put it at risk fast, sometimes even when you were driving your own personal car on your own time.

If you hold a CDL and you've been arrested for DUI in San Diego, you're right to be worried, and you're right to take this seriously. But worry doesn't have to turn into panic. There's work to be done, and the sooner it starts, the more room there is to protect your license and your livelihood.

Overview

California holds commercial drivers to a stricter standard than everyone else. While the general adult limit is a blood alcohol concentration of 0.08 percent, a driver operating a commercial vehicle is considered under the influence at just 0.04 percent under Vehicle Code 23152(d). That's half the normal limit. A single strong drink can put a commercial driver over the line while operating a commercial vehicle.

There are really two different scenarios, and it's important to know which one you're in:

  • You were driving a commercial vehicle. The 0.04 limit applies, and a DUI here hits your CDL directly and hard.
  • You were driving your personal vehicle off the clock. You're judged by the standard 0.08 limit like any other driver for the criminal charge, but a DUI conviction, even in your own car, can still trigger a CDL disqualification under federal and state rules. This is the part that surprises drivers most. A DUI on a Saturday night in your own truck's off-duty pickup can still cost you your commercial credential.

Federal regulations govern CDL disqualifications, and California enforces them. A first DUI conviction generally results in a one-year disqualification of the commercial driving privilege. If you were hauling hazardous materials at the time, that jumps to three years. A second DUI-type violation can result in a lifetime disqualification, though there are limited provisions that may allow reinstatement after 10 years in some circumstances. These are heavy consequences, and unlike a regular license suspension, there is no restricted or work-permit CDL that lets you keep driving commercially during a disqualification. That option simply does not exist for the commercial privilege.

And just like every other DUI, there are two separate tracks running at once. The criminal case moves through San Diego County Superior Court. The DMV Administrative Per Se action deals with your license, and you generally have only 10 days from the arrest to request a DMV hearing before an automatic suspension kicks in. For a commercial driver, that DMV side is not a side issue. It's central. Our DMV hearings page goes deeper on how that process works.

Joe's Approach

Joe Crudo takes commercial driver cases seriously because he understands what's actually on the line. This isn't about points on a license. It's about whether you can keep doing the job you've built your life around. When you call Crudo Law, you deal directly with Joe, not a rotating cast of associates. You get an attorney who will learn the specifics of your route, your employer's requirements, and your record, because those details shape strategy.

Joe knows that a commercial driver often has more to lose from the collateral consequences than from the criminal penalties themselves. The fine and the DUI school are real, but the disqualification is what ends careers. So the approach centers on protecting the commercial privilege wherever the facts allow, whether that means fighting the charge, challenging the evidence, or working toward a reduction that keeps a DUI off the record.

That means digging into everything. Where was the arrest, and was the stop lawful? What device measured your BAC, and was it calibrated and maintained? At the 0.04 threshold, the margin between a reading that disqualifies you and one that doesn't can be razor thin, which makes the accuracy of the testing even more important than usual.

Joe also handles the practical realities. Many employers have policies requiring drivers to report an arrest or charge, and the timing of the court and DMV matters for how you communicate with your employer. Cases arising in central San Diego are typically heard at the Central Division downtown, while North County arrests generally go to Vista, though the assigned courthouse can vary by charge and filing. Knowing the local landscape helps set a realistic plan. You can read more about how Joe works on the about page.

Defense Strategies

No lawyer can guarantee a result, and the right strategy always depends on the facts. But there are proven ways to challenge a commercial driver DUI, and Joe evaluates each of them.

Challenging the traffic stop. Police need a lawful basis to pull you over. If the stop wasn't justified, the evidence that followed may be subject to challenge, which can weaken or unravel the case.

Attacking the BAC evidence. Because the commercial limit is 0.04, precision matters enormously. Breath machines and blood draws both have failure points. Calibration and maintenance records, the qualifications of whoever ran the test, chain of custody on a blood sample, and the timing of the test all get scrutinized. A blood split motion can allow independent retesting of a sample. Our page on BAC defense explains these challenges in more detail.

Rising blood alcohol. Alcohol keeps absorbing after your last drink. Your BAC at the time you were actually driving may have been lower than what the machine showed later at the station. At the 0.04 commercial threshold, that timing gap can be decisive.

Mouth alcohol and medical conditions. Acid reflux, certain diets, residual mouth alcohol, and other factors can inflate a breath reading. At low BAC levels, these innocent explanations carry real weight.

Negotiating a reduction. In some cases, depending on the facts and your record, a charge can be reduced to a wet reckless or another lesser offense. Because CDL disqualifications are tied to specific DUI convictions, keeping a DUI off the record can be the difference between keeping your commercial privilege and losing it. Whether a reduction is realistic depends entirely on the evidence and the circumstances.

The strategy for a commercial driver is often shaped as much by the disqualification rules as by the criminal exposure. That's the difference between a lawyer who treats your case like any other DUI and one who understands what a CDL actually means to you.

Potential Outcomes

Every case is different, so read this as a general map of what's possible, not a prediction. On the criminal side, a first DUI conviction in California can involve fines and fees, DUI school, informal probation that commonly runs 3 to 5 years, possible county jail exposure up to 6 months for a first offense though jail is not automatic, and in many cases an ignition interlock device requirement for the personal driving privilege. Our ignition interlock page covers how those devices work.

The bigger issue for a commercial driver is the CDL. A first DUI conviction generally brings a one-year disqualification of the commercial driving privilege, or three years if hazardous materials were involved. A second qualifying violation can result in a lifetime disqualification. During any disqualification period, there is no restricted commercial license, which is why so much of the effort goes into avoiding a disqualifying conviction in the first place.

The personal driving privilege and the commercial privilege are handled differently. In some cases a driver may be able to obtain a restricted license for personal driving even while the commercial privilege is disqualified, but that does not restore the ability to drive commercially. It's a distinction that matters a great deal to how you plan your next steps.

On top of the legal consequences, a DUI can affect employment, insurance, and the ability to be hired by future carriers, many of which screen driving records closely. Some convictions can eventually be expunged after probation, but expungement does not undo a federal disqualification period. That's why the front end of the case, done right, matters so much.