Picture this: It's a Saturday night, and one of your drivers is off-duty, driving their personal vehicle. The driver picks up a DUI. Then, they show up to your workplace on Monday morning and go about their safety-sensitive duties like usual. You're running annual-only MVR reviews, and that conviction isn't in your last pull. This is a major violation in the eyes of the FMCSA.
Under regulation §383.37, it's also a violation if you knowingly put a disqualified driver behind the wheel.
First major offense: one year minimum. Second major offense: lifetime.
| Offense | First Offense | First Offense (Hazmat) | Second Offense |
|---|---|---|---|
| DUI, alcohol or controlled substance (any vehicle) | 1 year | 3 years | Lifetime |
| BAC of 0.04% or above while operating a CMV | 1 year | 3 years | Lifetime |
| Leaving the scene of an accident involving a CMV | 1 year | 3 years | Lifetime |
| Using a CMV to commit a felony | 1 year | 3 years | Lifetime |
| Causing a fatality through negligent operation of a CMV | 1 year | 3 years | Lifetime |
| Refusing a drug or alcohol test | 1 year | 3 years | Lifetime |
| Driving a CMV while CDL is revoked, suspended, or cancelled | 1 year | 3 years | Lifetime |
| Operating a CMV while disqualified | 1 year | 3 years | Lifetime |
A few things catch fleet managers off guard here. A DUI in a personal vehicle counts. Off-duty status doesn't matter — a conviction is a conviction. Refusing a test carries the same disqualification as a positive result. Your driver doesn't get credit for walking away from the test.
Drug trafficking with a commercial vehicle is a lifetime ban.
| Felony Type | First Offense |
|---|---|
| Any felony committed using a CMV | 1 year |
| Drug trafficking using a CMV | Lifetime |
These don't carry the immediate weight of a major offense. But they compound. Two within three years triggers a 60-day disqualification; three get you 120 days.
Offenses classified as "serious" under federal law:
| Number of Serious Violations (within 3 years) | Disqualification Period |
|---|---|
| 2 serious violations | 60 days |
| 3 or more serious violations | 120 days |
“Fleet managers sometimes overlook the accumulation rule. A single speeding ticket 16 mph over the limit is a serious violation, but it does not disqualify by itself. A second one within 3 years does, 60-day disqualification, no exceptions. If you are not tracking violation dates, you will miss the trigger.”
Foley Compliance Team, FMCSA-Registered C/TPA
You need violation dates, not just violation counts. A driver with two speeding tickets three years and two days apart has no disqualification problem. Same driver with two tickets 14 months apart does. Pull the full history.
These carry a separate schedule from the serious violation rules. Carriers often forget these exist.
| Offense | First Offense | Second Offense (within 3 years) | Third Offense (within 3 years) |
|---|---|---|---|
| Failing to stop before a railroad crossing when required | 60 days | 120 days | 1 year |
| Failing to slow down and check for an approaching train | 60 days | 120 days | 1 year |
| Failing to have sufficient space to clear the crossing | 60 days | 120 days | 1 year |
| Failing to obey a traffic control device at a crossing | 60 days | 120 days | 1 year |
| Failing to negotiate a crossing because of insufficient undercarriage clearance | 60 days | 120 days | 1 year |
A driver with one of these needs retraining before they go back on the road, disqualification period or not.
Driving through an OOS order is its own escalating penalty structure. First offense: 90 days to a year. Third offense within 10 years: 3 to 5 years.
| Violation | Disqualification Period |
|---|---|
| First violation of OOS order | 90 days to 1 year |
| Second violation of OOS order (within 10 years) | 1 to 5 years |
| Third or subsequent violation (within 10 years) | 3 to 5 years |
| First OOS violation while transporting hazmat or 16+ passengers | 180 days to 2 years |
| Subsequent OOS violation with hazmat/passengers (within 10 years) | 3 to 5 years |
Section 383.51 defines CDL disqualifications. Section 391.15 defines your obligation to remove a driver from safety-sensitive duties. They're not the same thing, and both apply.
Under §391.15, you must remove a driver when they lose driving privileges, commit criminal or immoral conduct involving a CMV, violate OOS orders, or trigger Part 382 drug and alcohol violations. A single incident can trip both regulations simultaneously.
The key point: your §391.15 obligation doesn't wait for state paperwork. If you know about the offense — from an MVR alert, from the driver's own disclosure, or from a supervisor report — you remove them. Don't wait for the state to formally process the disqualification.
Remove the driver from safety-sensitive duties immediately. Document it in the driver's qualification file — the date, specific offense, MVR entry, and action taken.
Then figure out how long the disqualification lasts. Use the tables in §383.51. Prior violations escalate the penalty, so you need the full history, not just the most recent entry. Most carriers check the violation but forget to count priors.
When the disqualification period ends, verify reinstatement before putting the driver back on the road. Pull a fresh MVR. Confirm with the issuing state that the CDL has been reinstated. Don't take the driver's word for it — they don't always know the full picture of what the state requires.
A disqualification ending doesn't obligate you to rehire or reassign the driver. Most insurance carriers won't cover drivers with major violations anyway. Factor that in.
Before a disqualified driver can return:
Lifetime disqualification isn't always permanent — after 10 years, drivers can petition for reinstatement. States rarely approve these. Don't plan around it.
Major disqualifying offenses under 49 CFR 383.51 include DUI (any vehicle), leaving the scene of an accident, using a CMV to commit a felony, causing a fatality through negligent driving, and refusing a drug or alcohol test. A first major offense results in a 1-year disqualification (3 years if transporting hazmat). A second major offense is a lifetime disqualification.
A first major offense carries a 1-year disqualification (3 years if transporting hazmat). A second major offense results in lifetime disqualification with no reinstatement path. Serious traffic violations result in a 60-day disqualification for 2 offenses in 3 years, or 120 days for 3 offenses in 3 years.
No. Under 49 CFR 383.37, knowingly allowing a disqualified driver to operate a CMV is a federal violation. The driver must be removed from safety-sensitive duties immediately upon discovery. Allowing a disqualified driver to operate exposes the carrier to federal penalties and catastrophic negligent entrustment liability.
Serious traffic violations under 49 CFR 383.51 include excessive speeding (15+ mph over the limit), reckless driving, improper or erratic lane changes, following too closely, driving a CMV without a CDL, and driving without proper class or endorsements. Two serious violations within 3 years trigger a 60-day CDL disqualification.
Yes. A DUI conviction disqualifies a CDL driver for 1 year regardless of whether the driver was operating a CMV or a personal vehicle. If the driver was transporting hazmat at the time, the disqualification is 3 years. A second DUI offense results in lifetime disqualification.