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.