The Hours of Service score, in plain words
What counts. The driving windows (11-hour driving, 14-hour duty, 70-hour week), rest breaks, record-of-duty truth, and ELD form-and-manner. One violation towers over the rest: the false log. Falsifying a record of duty status carries the heaviest common weight in the system because FMCSA treats it as a honesty violation, not a paperwork slip.
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. Hours of Service is where a single bad week can build a flagged score — violations cluster (a driver over hours usually breaks three rules on one trip), and false-log findings stack. It is also the category where a dismissed citation most often wipes points out: log-related tickets go to court, and court outcomes flow back through DataQs.
The violations that feed it most
From the current FMCSA violation file, ranked by total severity:
| Violation | Avg points | Times in file |
|---|---|---|
| HOS (Property) - Failing to have a record of duty status using the method prescribed (3958A1HOSP) | 6.9 | 63,024 |
| HOS (Property) - No driver may make a false report in connection with a duty status. Explain (3958EHOSPD) | 7.3 | 58,973 |
| HOS (Property) - Driver produces a false record of duty status that concealed an HOS limitation violation after the last rest period. Explain: (3958EHOSPDOOS) | 8.6 | 15,892 |
| HOS (Property) - Driving beyond the 14 hour after coming on duty following 10 consecutive hours off duty during the current 8 consecutive day period. Date and Tim (3953A2HOSPD) | 7.1 | 19,179 |
| HOS (Property) - Driving more than 11 hours following 10 consecutive hours off duty during the current 8 consecutive day period. Date and Time (3953A1HOSPD) | 7.2 | 17,341 |
| HOS - False record of duty status driver improper use of Personal Conveyance - Not OOS (3958E1PC) | 7.1 | 15,900 |
| False report of drivers record of duty status (3958E) | 8 | 12,139 |
| Driving beyond 8 hour driving limit since the end of the last on duty off duty or sleeper period of at least 30 minutes (3953A3II) | 7 | 10,234 |
How the measure is built
The measure counts HOS violations found at inspection and in audits, weighted by severity and time, against the carrier's driver inspections. Form-and-manner violations (missing entries, unsigned logs) weigh light; the driving-window violations weigh more; a false record of duty status — the false log — sits at the top of the common weights because FMCSA reads it as a truth violation.
What brokers do with this number
To a broker, a flagged HOS score says the delivery promises this carrier makes may be built on illegal hours — which makes the broker's own customer a party to the problem when a tired driver is late or worse. Dispatchers feel this one personally: the score follows the carrier into every load board check, and a false-log history is the hardest line in it to explain away.
What a bad month looks like
One driver, one bad week: a 14-hour violation, a missed rest break, and a false entry written to cover them. Three violations from one trip, all at ×3 weight — that is how an HOS score jumps in a single run while the rest of the fleet did nothing wrong.
How to lower it
- Never drive past the window to fix it later — the false-log risk is worse than the late load.
- Audit ELD edits weekly; unexplained edits are what auditors and reviewers look at first.
- Calendar every log-related citation's court date — a dismissal is a DataQs filing waiting to happen.
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 Hours of Service standing, check your CSA score free.
Questions
Do form-and-manner log violations really count?
Yes — lightly. They are the small weights in this category. The damage comes from the window violations and false logs; but a pile of form-and-manner findings also tells an auditor the log system is loose.
My ELD malfunctioned. Can those violations be fought?
If the record is genuinely wrong — the device failed and the paper backup proves the true hours — that is a data-error challenge in DataQs. Attach the ELD malfunction documentation and the reconstructed log.
The Fix Kit — $79, one time
The checker shows the record. The kit is the fix — walkthroughs, templates, and the 90-day plan.
- Your Record, Decoded — every line, in plain words
- The DataQs Challenge Playbook + six fill-in templates
- The Bad-Inspection Cleanup Guide — the 24-month math
- Authority & Insurance Flag Fixes (Motus walkthrough)
- The 90-Day Score-Lowering Plan
- The Broker-Ready One-Pager
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