What 390.6 means in plain language
FMCSR 390.6 is a general administrative requirement under Part 390. While the specific provision addresses motor carrier compliance obligations, the regulation focuses on ensuring that carriers and drivers maintain proper documentation and meet foundational operational standards required by federal transportation law.
This is a housekeeping-type violation—the kind of citation that typically doesn't result in immediate roadside enforcement action but rather reflects a gap in your carrier's administrative practices or record-keeping. It's rarely the flashpoint in a roadside inspection; instead, it often surfaces during carrier compliance audits or when inspectors notice systemic documentation issues.
The key takeaway: this citation is not about your vehicle's mechanical condition or your driving behavior. It's about whether the company and driver meet baseline paperwork and organizational requirements.
What our enforcement data actually shows
Across our 13 million+ inspection records, 390.6 is exceptionally uncommon. All-time, we have recorded only 2 citations for this code. In the last 12 months, there were 0 citations, and in the last 90 days, there were 0 citations.
Because so few drivers have been cited, 390.6 ranks #2651 out of 3,036 FMCSR codes by enforcement volume. Of the 2 all-time citations, none resulted in an out-of-service order—an OOS rate of 0.0%. For context, the all-FMCSR average OOS rate is 31.4%, meaning this code is almost never treated as a safety-critical violation severe enough to pull a vehicle off the road immediately.
The rarity of this citation is the most important fact: if you've been cited for 390.6, you're in an extremely small group. This suggests either a very specific compliance gap at your carrier or an unusual circumstance in your case.
Who gets cited most
Given that only 2 citations exist in our entire database, state-level patterns are not meaningful. However, our data does show that USA TRUCK LLC (USDOT 213754) and ADVANCED AUTO RECYCLING LLC (USDOT 4040841) each received 1 citation for 390.6. The citation vehicles included a Dodge, a Freightliner, and a Great Dane—no pattern emerges from a sample this small.
The lack of geographic or carrier concentration underscores how rare this violation is in actual roadside enforcement.
How severe is this compared to similar codes
Within the General/Admin category, 390.6 is far less frequently cited than its peer codes. For comparison:
- 390.21TB2-DOT has 74,663 all-time citations with a 0.0% OOS rate.
- 390.21T(b) has 61,097 all-time citations with a 0.0% OOS rate.
- 390.21TB1-MC has 59,189 all-time citations with a 0.0% OOS rate.
- 390.21(a) (Vehicle marking requirements) has 25,872 all-time citations with a 0.0% OOS rate.
All of these codes represent much more frequent violations—often related to vehicle marking, USDOT number display, and biennial inspection documentation. Like 390.6, none of them carry a meaningful OOS rate, confirming that administrative violations in Part 390 are typically resolved through corrective action rather than roadside removal.
390.6 is significantly rarer than even the lowest-volume peer codes shown, which suggests inspectors do not commonly look for it or that carriers routinely meet its requirements.
How to avoid it
Because 390.6 is an administrative code and citations are extremely rare, prevention is straightforward:
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Verify your carrier maintains complete motor carrier registration and authority documentation. Before you start a shift, confirm your company's DOT authority and insurance are current. Your dispatcher or safety manager should have this posted or readily accessible.
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Check that your vehicle displays the required carrier markings and USDOT number. Walk around your rig during your pre-trip inspection. Inspect door panels, cab sides, and trailers for faded, missing, or illegible USDOT lettering. If you can't read it from a safe distance, neither can an inspector.
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Keep your driver qualification file up to date. Ensure your carrier has your current medical certificate, driving record, employment history, and any required training records on file. Ask your safety manager to confirm these are current before you hit the road.
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Understand your carrier's procedures for regulatory compliance. If your company has undergone recent ownership changes, undergone an audit, or reorganized dispatch operations, ask your fleet manager about any process changes. Administrative violations sometimes emerge during transitions.
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Report missing or outdated documentation immediately. If you notice your USDOT marking is damaged, your vehicle lacks required placards, or you suspect your qualification file is incomplete, notify your carrier's safety or compliance team at once. Proactive correction prevents citations.
The rarity of 390.6 enforcement means your citation likely reflects a specific, localized issue rather than a widespread pattern. Work with your carrier to identify and correct it, and you should not expect ongoing enforcement attention on this code.