Quick answer: Maryland CDL disqualifications are set by federal rule (49 CFR § 383.51) and mirrored in Md. Code, Transp. § 16-812. A major offense — DUI, refusing the test, leaving the scene, using a vehicle in a felony, or driving a CMV while disqualified — costs your CDL for 1 year on a first conviction (3 years if you were hauling placarded hazmat) and for life on a second. A single serious violation (like speeding 15+ over or following too closely) does not disqualify you, but a second within three years brings 60 days and a third brings 120 days. These periods are mandatory, they count even when you were in your personal car, and a Probation Before Judgment does not shield your record.
I’m David Waranch, and I’ve handled thousands of Maryland traffic cases, including many for commercial drivers whose livelihood was on the line. The key thing to understand is that once a qualifying conviction is entered, the MVA has almost no discretion to soften the disqualification. All the leverage is in the charge and the defense, before a conviction lands.
How does Maryland decide a CDL disqualification?
Unlike the point system that governs ordinary drivers, CDL disqualification is largely automatic. Federal law sorts qualifying convictions into tiers, and each tier carries a fixed disqualification period the MVA must impose. There is no hardship license for the commercial privilege and no after-the-fact relief once the conviction is on the record. The Maryland statute, Transp. § 16-812, tracks the federal table almost word for word, so the first job in any commercial case is to identify which tier the charge falls into. That single fact usually decides everything that follows. For the wider picture, our complete Maryland CDL driver’s guide ties these rules together.
What counts as a major offense, and how long is the disqualification?
Major offenses are the career-threatening tier. A single conviction disqualifies the CDL no matter how clean the rest of the record is. The disqualification is 1 year on a first conviction, 3 years if the driver was transporting placarded hazardous materials at the time, and lifetime on a second major conviction from a separate incident. A lifetime ban may be reduced to a minimum of 10 years after the driver completes a state-approved rehabilitation program — with one exception: using a commercial vehicle to commit a felony involving controlled substances is a true lifetime ban with no reduction.
| Major offense | First conviction | First (hauling placarded hazmat) | Second conviction (any combination) |
|---|---|---|---|
| DUI/DWI, or a BAC of 0.04+ in a CMV | 1 year | 3 years | Lifetime |
| Refusing an alcohol or drug test | 1 year | 3 years | Lifetime |
| Leaving the scene of an accident | 1 year | 3 years | Lifetime |
| Using a vehicle to commit a felony | 1 year | 3 years | Lifetime |
| Driving a CMV while your CDL is suspended, revoked, or disqualified | 1 year | 3 years | Lifetime |
| Causing a fatality by negligent operation of a CMV | 1 year | 3 years | Lifetime |
| Using a CMV in a felony involving making, distributing, or dispensing a controlled substance | Lifetime — no 10-year reduction | Lifetime — no 10-year reduction | Lifetime — no 10-year reduction |
Two details trip drivers up. The commercial alcohol threshold is 0.04, half the 0.08 limit that applies to a personal license, so a commercial driver can be over the line at a blood alcohol level that would be legal in a car. And a DUI counts as a major offense even when it happened in your personal vehicle — the disqualification reaches your CDL regardless. Because DUI ends more commercial careers than any other charge, we cover it in depth on our Maryland DUI and CDLs page.
Does one serious violation disqualify a CDL?
No. A single serious traffic violation does not disqualify a CDL. The catch is that it goes on the commercial record and counts toward the next one. Get a second serious violation from a separate incident within three years and you lose the CDL for 60 days; a third within the same window costs 120 days. The three-year clock runs between incident dates, not conviction dates, and convictions from your personal vehicle count too.
| Serious violations within 3 years | Disqualification |
|---|---|
| One | None — but it stays on your record |
| Two (separate incidents) | 60 days |
| Three or more (separate incidents) | 120 days |
The offenses that count as serious violations are: speeding 15 mph or more over the limit; reckless driving; improper or erratic lane changes; following too closely; a traffic-control violation tied to a fatal crash; driving a CMV without the proper class of CDL, endorsement, or the license in your possession; and texting or using a hand-held phone while driving a CMV. Because the first one is “free” of disqualification but arms the trap, the first serious conviction is exactly when a commercial driver should fight hardest. Keeping it off the record stops a future minor mistake from triggering a 60- or 120-day loss. Two of the most common are following too closely and speeding — see how many points a Maryland speeding ticket carries. For how everyday tickets interact with the CDL more broadly, read how traffic tickets affect a Maryland CDL.
What about out-of-service and railroad-crossing violations?
These two categories carry their own separate periods. Out-of-service violations are among the most heavily punished things a commercial driver can do, and they add substantial federal civil penalties on top of the disqualification. Railroad-grade-crossing violations are punished severely given the catastrophic potential of a truck-train collision.
| Violation | First | Second | Third or more |
|---|---|---|---|
| Out-of-service order (nonhazardous cargo) | 180 days to 1 year | 2 to 5 years (within 10 years) | 3 to 5 years (within 10 years) |
| Out-of-service order (hazmat, or 16+ passengers) | 180 days to 2 years | 3 to 5 years (within 10 years) | 3 to 5 years (within 10 years) |
| Railroad-grade-crossing violation | At least 60 days | At least 120 days (within 3 years) | At least 1 year (within 3 years) |
Will a PBJ keep the conviction off my CDL?
No, and this is the most expensive misunderstanding a commercial driver can have. In an ordinary case, a Probation Before Judgment can keep a conviction off your record. For a CDL holder it does not work that way. Federal anti-masking rules (49 CFR § 384.226) bar any state from masking, deferring, or diverting a CDL holder’s conviction, so a Maryland PBJ still reaches the commercial record and the disqualification still attaches. Commercial drivers also cannot use diversion programs for a qualifying CMV violation.
Paying the ticket or taking a quick PBJ can end your career. Paying a Maryland citation is a guilty plea and creates a conviction, and a PBJ does not shield a CDL from disqualification. Requesting a trial or a waiver hearing costs nothing extra to ask for and keeps a non-conviction result in play. For a commercial driver, the time to act is before a disqualifying conviction is entered — after that, no effort can undo it.
The same rule cuts both ways on what does not count. Parking, vehicle-weight, and equipment-defect violations are not subject to the masking prohibition, and overweight tickets in particular are not disqualifying offenses at all — see our Maryland CDL overweight violation page. If your question is whether a past record bars you from holding the license in the first place, that is a different analysis covered on what disqualifies you from getting a CDL in Maryland.
Can a disqualified CDL be reinstated?
Yes, after the disqualification period is fully served. For a period under one year you apply to restore the CDL and pay the required fees; for a period of a year or more you must apply for a new CDL and pass the skills and knowledge tests again. A lifetime disqualification can be cut to a minimum of 10 years only through a state-approved rehabilitation program, and that path is closed for a controlled-substance CMV felony. You cannot drive a commercial vehicle during the disqualification — doing so is itself a major offense that stacks another period on top. The step-by-step process is on our how to reinstate a disqualified CDL in Maryland page.
Why the charge and the defense decide everything
Because disqualification is mandatory once a qualifying conviction is entered, the whole fight happens at the charging and trial stage. The realistic goals are to beat the charge outright, reduce it to a non-disqualifying offense, or — with serious violations — keep that first conviction off the record so it can never combine with a later one. Points still apply on top of all this, so protecting the underlying driving record matters too; our summary of Maryland’s point system explains that side. There is no PBJ shortcut and no hardship relief, so a commercial driver who simply pays a ticket may trigger a loss that nothing can reverse. A lawyer who knows the federal CDL framework can identify the tier and fight for the result that keeps you working.
Yes. A DUI is a major offense that disqualifies your CDL even when it happens in your personal vehicle. A first conviction costs the CDL for 1 year, and a second major conviction is a lifetime disqualification.
A single serious violation does not disqualify you. A second serious violation from a separate incident within three years brings a 60-day disqualification, and a third within three years brings 120 days.
No. Federal anti-masking rules bar Maryland from masking a CDL holder’s conviction, so a PBJ does not keep a qualifying offense off your commercial record and the disqualification still applies.
Law Offices of David R. Waranch — 301-563-9575 · toll-free 1-877-566-2408. Hablamos Español.
Last updated: September 2026. Statutory references: Md. Code, Transp. § 16-812; 49 CFR §§ 383.51 and 384.226. This page is general information about Maryland law, not legal advice, and reading it does not create an attorney-client relationship.