What 392.2-SLLFMH means in plain language
FMCSR 392.2-SLLFMH prohibits you from driving a commercial motor vehicle when your ability or alertness is impaired by fatigue, illness, or any other condition that makes it unsafe to operate. This is a straightforward safety rule: if you're too tired, too sick, or otherwise unable to drive safely, you should not be behind the wheel.
The regulation doesn't require you to have a diagnosed medical condition or to fail a specific test. An officer making a roadside inspection assesses your physical state—your alertness, responsiveness, ability to communicate clearly, and overall fitness to drive—and makes a judgment call about whether you're safe to continue. This is a judgment-based citation, not a checklist violation.
The core issue is your condition at the moment of inspection, not what happened hours earlier or what condition you might develop later. If an officer observes signs of fatigue or illness that suggest you cannot safely operate the vehicle, that observation forms the basis for the citation.
What our enforcement data actually shows
Across our 13 million+ inspection records, 392.2-SLLFMH is rarely cited. We have recorded 1 citation all-time, with 0 citations in the last 12 months and 0 in the last 90 days. The code ranks #2796 out of 3,036 FMCSR codes by citation volume, making it one of the least frequently enforced violations in the database.
Out of service enforcement is also uncommon for this code. Of the 1 citation on record, 0 resulted in out-of-service placement, yielding a 0.0% OOS rate. For comparison, the all-FMCSR average OOS rate is 31.4%, meaning 392.2-SLLFMH is significantly less likely to result in immediate removal from service than the typical violation. This low rate likely reflects that officers have substantial discretion in enforcement and may address fatigue or illness concerns through warnings or corrective action rather than citations.
Who gets cited most
Our records show only one carrier cited for 392.2-SLLFMH all-time: ERC Transport Inc (USDOT 1224041), with 1 citation. With so few citations nationally, patterns across fleets are not statistically meaningful. The data does not support claims that this violation concentrates in particular regions or among specific carrier types.
Vehicle makes cited include Freightliner and Hyundai TR, each with 1 citation. Again, the sample is too small to draw conclusions about which equipment types are more likely to trigger enforcement.
How severe is this compared to similar codes
The broader 392.2 violation—Operating a CMV while ill or fatigued (without the SLLFMH subcode)—shows substantially higher enforcement volume: 1,208,164 citations all-time with a 0.8% OOS rate. This suggests that the generic 392.2 code captures the vast majority of fatigue and illness enforcement.
Other closely related codes in the same family include 392.2-SLLSR (191,232 citations, 0.1% OOS rate), 392.2RG (96,652 citations, 0.1% OOS rate), and 392.2-SLLTCD (85,391 citations, 0.0% OOS rate). All of these variants see far higher citation frequencies than 392.2-SLLFMH, but similarly low OOS rates, indicating that fatigue and illness violations rarely result in immediate removal from service across all coding variants.
How to avoid it
Before your shift:
- Know your limits. If you are ill with fever, body aches, or respiratory symptoms, or if you have not slept adequately, inform your dispatcher and do not accept a load. The safest decision protects you, your cargo, and the public.
- Track your sleep. Log your actual sleep hours over the past 24–48 hours. If you have had fewer than 5–6 hours, you are at higher risk of impaired alertness and should rest before driving.
- Do not attempt to drive while taking new medications, cold medicines, pain relievers, or allergy medications that cause drowsiness. Read labels and ask your pharmacist or doctor about side effects.
During your pre-trip:
- Conduct a brief self-assessment: Are you alert? Can you react quickly? Is your vision clear? Can you concentrate on the road? If the answer to any is no, do not start the engine.
- If you feel fatigue building during a shift, pull over at a safe location and rest. A 15–20 minute nap can restore alertness. This is not lost time; it is accident prevention.
- Communicate with your company. Most carriers have fatigue-reporting policies and dispatch protocols that allow you to report unsafe conditions without penalty. Use them.
On the road:
- Stop every 1.5–2 hours to walk, stretch, and reset your alertness. Sitting motionless for 8+ hours degrades concentration.
- Stay hydrated and avoid heavy meals that promote drowsiness. Eat light snacks and drink water throughout your shift.
- Do not rely on energy drinks, caffeine, or other stimulants as a substitute for rest. They wear off and can mask fatigue while impairing judgment.