What Can Disqualify Your CDL
The offenses and violations that suspend or end a commercial driving career — and how long they last.
Key Facts
- A first major offense (like DUI or leaving the scene of an accident) in any vehicle disqualifies your CDL for at least one year — three years if hauling hazmat.
- A second major offense generally means a lifetime disqualification (with a possible reinstatement path after 10 years).
- 'Serious traffic violations' — like excessive speeding, reckless driving, or texting while driving — stack up: two in three years means a 60-day disqualification, three means 120 days.
- A refused drug or alcohol test is treated the same as a failed one.
Major offenses
Federal rules (49 CFR 383.51) disqualify a CDL for at least one year for a first major offense — including driving under the influence, refusing a required test, leaving the scene of an accident, or using a vehicle to commit a felony. If it happens while hauling placarded hazmat, it's three years. A second major offense is generally a lifetime disqualification.
Serious traffic violations
- Excessive speeding (15+ mph over)
- Reckless or erratic driving
- Improper or erratic lane changes
- Following too closely
- Texting or using a hand-held phone while driving
- Driving a CMV without the proper CDL or endorsement
How they add up
Two serious traffic violations within three years (in a CMV) bring a 60-day disqualification; three within three years bring 120 days. Out-of-service and railroad-crossing violations carry their own escalating penalties. Because these follow your driving record — and your CSA profile — the cheapest strategy is simply clean driving.
Frequently Asked Questions
- Do violations in my personal car count?
- Major offenses like DUI count against your CDL even in a personal vehicle. Many serious traffic violations are counted when they occur in a commercial motor vehicle — but a DUI conviction in any vehicle can disqualify your CDL.
- Can a disqualified CDL be reinstated?
- Short disqualifications end after the set period. A lifetime disqualification from two major offenses may allow reinstatement after 10 years under specific conditions, but this is limited and not guaranteed.