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AhaBulb: Stuff Everyone Should Know · ahabulb.com/cdl-serious-violation-speeding-15

Speeding counts as a serious traffic violation for CDL holders at how many mph over the limit?

15 mph or more over the posted limit.

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  1. 10 mph or more
  2. 15 mph or more ✔
  3. 25 mph or more

Why: Excessive speeding, meaning 15 mph or more over the limit, is a serious traffic violation. So are reckless driving, erratic lane changes and following too closely.

Huh, didn't know that: Texting or holding a phone while driving a CMV is also a serious traffic violation.

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References

Answer: 15 mph or more. Excessive speeding, meaning 15 mph or more over the limit, is a serious traffic violation. So are reckless driving, erratic lane changes and following too closely.

  1. 49 CFR 383.51 Disqualification of drivers (eCFR) www.ecfr.gov/current/title-49/section-383.51
    Speeding excessively, involving any speed of 24.1 kmph (15 mph) or more above the regulated or posted speed limit
    Checked 2026-10-10.

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