What 392.6 means in plain language
FMCSR 392.6 addresses a scheduling violation, not a driving violation. It applies when a motor carrier or dispatcher schedules a run in a way that would require the vehicle to be operated at speeds exceeding legal limits. The violation sits at the planning stage—before the wheels turn.
In practice, this means a carrier dispatches you with a pickup and delivery schedule that is mathematically impossible to meet without speeding. The cited violation belongs to the carrier's operations, not necessarily to you as the driver. However, if you received this citation at roadside, an inspector determined that your assigned route and schedule would have required exceeding the posted speed limit.
The regulation treats dispatch planning as part of safe operations. Even if you drove safely and legally, if your assigned run was impossible to complete within speed limits, the carrier may have violated this rule.
What our enforcement data actually shows
This code is exceptionally rare in enforcement. Across 13 million inspections in our database, we have recorded only 4 all-time citations for 392.6. In the last 12 months, we saw zero citations. In the last 90 days, we saw zero citations.
None of the 4 all-time citations resulted in an out-of-service order. The OOS rate for 392.6 is 0.0%. For context, the all-FMCSR average OOS rate is 31.4%, meaning 392.6 citations almost never escalate to immediate vehicle removal from service. This code ranks #2480 out of 3,036 FMCSR codes by citation frequency, placing it in the lowest tier of enforcement activity.
The rarity of this violation suggests that either carriers rarely schedule impossible runs, or that inspectors rarely document this particular violation in the field. Either way, if you received a 392.6 citation, you are among a very small group.
Who gets cited most
Our inspection records show only 4 citations for 392.6 across the entire dataset, distributed among four carriers: Rich Farms Inc (USDOT 485860) with 1 citation, GP Trans Inc (USDOT 1227505) with 1 citation, AA&F Transport LLC (USDOT 2895182) with 1 citation, and Mahar Trans Inc (USDOT 3566185) with 1 citation.
Because the sample size is so small, no meaningful state or carrier concentration emerges. The four citations involved vehicle makes including Kenworth, Freightliner, and others, but again, the volume is too low to establish patterns that would predict future enforcement.
If you were cited, your carrier was in rare company—and that small sample size also means the violation may reflect unusual dispatch circumstances rather than a systemic problem at your company.
How severe is this compared to similar codes
392.6 sits in the Unsafe Driving category alongside other violations, but its enforcement profile is dramatically different from its peer codes.
392.2 (Operating a CMV while ill or fatigued) has recorded 1,208,164 citations with a 0.8% OOS rate. Even accounting for the large citation volume, the OOS rate is still low. Other variants of 392.2 show similar patterns: 392.2-SLLSR has 191,232 citations at 0.1% OOS, and 392.2-SLLS2 (Speeding 6–10 mph over limit) has 72,337 citations at 0.0% OOS.
392.6's 0.0% OOS rate matches the least severe peer codes, but with a citation count (4) that is orders of magnitude smaller. This suggests that when 392.6 is cited, inspectors treat it as a minor violation and do not impound or ground the vehicle.
The contrast is stark: the most common Unsafe Driving violation in our records (392.2 at over 1.2 million citations) still has a higher OOS rate than 392.6's vanishingly small enforcement volume allows.
How to avoid it
If you receive a 392.6 citation, the corrective action belongs primarily to your carrier's dispatch and planning team. However, you can take steps to prevent future citations:
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Document assigned schedules before dispatch. Before accepting a run, confirm the pickup location, delivery location, distance, and deadline. Use mapping tools to estimate legal travel time at posted speed limits, and flag your dispatcher if the window appears unrealistic. This creates a record that protects both you and the carrier.
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Communicate impossible schedules immediately. If your dispatcher assigns a run that you determine cannot be completed legally, notify them in writing (text, email, or your carrier's app) before you depart. Do not assume your dispatcher knows the math doesn't work. This shifts accountability toward the planning function where it belongs.
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Report systematic pressure. If your carrier regularly assigns runs with tight deadlines that implicitly require speeding, escalate to safety management or corporate compliance. A pattern of impossible schedules is a safety and legal risk for your entire fleet.
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Perform pre-trip planning with time buffers. On every run, add 10–15% extra time for traffic, weather, or inspection delays. If your carrier's expected arrival time does not include this buffer, you have early notice that the schedule is aggressive.
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Keep records of route times. After completing runs, note actual travel time against estimated legal time. Over time, you will build evidence of whether your carrier's baseline assumptions are realistic. If they are not, you have data to present to safety leadership.
The fundamental issue is dispatch planning, not driver behavior. If you were cited for 392.6, focus on communication with your carrier's operations team to ensure future runs are scheduled with realistic timelines.