The Unsafe Driving score, in plain words

What counts. Speeding at every level, hand-held phone use, following too close, lane restrictions, failure to obey a traffic device, seat belts. Everything an officer can see from a moving patrol car feeds this category — it is the behaviour score.

The line. FMCSA's intervention threshold for this category is the 65th percentile — at or over it, the category is flagged for enforcement attention, and it is the flag brokers' policies key on. (In FMCSA's current public files, the alert on a carrier's own record is the operative signal — your report card reads it straight from the file.)

Why it matters. This score moves fastest, in both directions: violations post within days, and clean months dilute it just as fast. It is also the score that gets drivers stopped again — officers can see a carrier's Unsafe Driving standing before they decide to inspect.

The violations that feed it most

From the current FMCSA violation file, ranked by total severity:

How the measure is built

The measure is built from inspections where an Unsafe Driving violation was written — most come from traffic stops, not scale houses, because the violations are driving behaviour an officer can see from a patrol car. Each violation's severity weight is time-weighted (×3 under 6 months, ×2 to a year, ×1 to 24 months) and divided by the carrier's inspection exposure, so a small carrier feels every stop.

What brokers do with this number

Brokers read Unsafe Driving as the recklessness score. It is the category most likely to be checked against a hard policy line, because insurers price it the same way — a carrier whose drivers speed is a carrier whose claims arrive. A flagged Unsafe Driving score with a clean everything else still loses loads, because the policy doesn't read footnotes.

What a bad month looks like

Three speeding citations in one month — say 6-10 over, 11-14 over, and a following-too-close — can stack enough fresh ×3 weight to push a one-truck carrier's measure from quiet to flagged in a single SMS run. The same carrier then needs months of clean driving just to dilute what one bad week built.

How to lower it

• Speed discipline with real teeth: the points scale with mph over the limit, and 15+ over is among the heaviest common violations in the system.
• A mounted-phone, voice-only rule — hand-held use is a top violation and an easy roadside observation.
• Treat every stop as an inspection trigger: a speeding stop that becomes a level-2 inspection adds Vehicle Maintenance exposure to a driving ticket.

The general math — time weights, the 24-month window, and the dilution effect — is in how to lower your CSA score. Violations that don't belong on your record come off through a DataQs challenge. To see your own Unsafe Driving standing, check your CSA score free.

Questions