What 392.2T means in plain language
FMCSR 392.2T prohibits you from operating a commercial motor vehicle when your ability or alertness is impaired through fatigue, illness, or any other cause that makes it unsafe to drive. This isn't about a single sneeze or a moment of drowsiness—it's about a condition serious enough that a roadside inspector believes your judgment or physical capability to operate the vehicle safely is compromised.
The regulation focuses on your state when you begin or continue operating. If you're already behind the wheel and an officer observes signs of impairment—slurred speech, bloodshot eyes, nodding off at stops, swerving—or if you self-report illness or fatigue, you're vulnerable to this citation. The standard is whether the condition makes it "unsafe" for you to drive, not whether you've already caused an accident.
What our enforcement data actually shows
Across our 13 million+ inspection records, 392.2T ranks #896 out of 3,036 FMCSR codes by citation volume. All-time citations total 528, with 228 citations in the last 12 months and 36 in the last 90 days. That means this code is cited steadily but infrequently compared to the universe of violations.
The out-of-service (OOS) rate for 392.2T is 0.6%—meaning only 3 drivers were placed out of service across all 528 citations in our database. This is substantially lower than the all-FMCSR average OOS rate of 31.4%. In other words, when 392.2T is cited, it almost never results in an immediate roadside removal, suggesting that most citations reflect marginal judgment calls or conditions the driver was able to manage during the inspection itself.
Looking at the last 12 months, citations peaked in June 2025 (37 citations) and July 2025 (34 citations), then moderated. This seasonal pattern may reflect summer heat stress and increased drowsiness during peak freight season.
Who gets cited most
Texas leads by a wide margin in the last 180 days with 56 citations and a 0.0% OOS rate. Iowa follows with 15 citations (0.0% OOS), and Illinois with 8 citations (0.0% OOS). Across all three states, no driver was pulled out of service for 392.2T, reinforcing the pattern that this violation rarely triggers immediate removal.
Our data shows fleets such as Schneider National Carriers Inc, New Prime Inc, and Western Express Inc each with 4 all-time citations for this code. Larger carriers predictably appear more often because they operate more vehicles; raw citation count alone does not indicate fleet-wide performance or culture.
How severe is this compared to similar codes
392.2T is one variant within a broader family of fatigue and illness codes. The parent code 392.2 (Operating a CMV while ill or fatigued) accounts for 1,208,164 citations across all our records, with an OOS rate of 0.8%—very close to 392.2T's 0.6%. Other variants like 392.2-SLLSR show 191,232 citations at a 0.1% OOS rate, and 392.2-SLLEQP shows 72,352 citations but a higher 2.4% OOS rate, suggesting that different factual circumstances or combinations of violations can shift enforcement severity.
Compare this to vehicle inspection codes like 393.9 (Inoperable Required Lamp), which shares inspections with 392.2T in 6 instances over the last 90 days. 393.9 is cited far more frequently and carries mechanical rather than behavioral implications. The key distinction: 392.2T is about your condition, not the truck's condition.
How to avoid it
Before you start your shift:
- Get adequate sleep. Plan your schedule so you're not fighting fatigue at the start of your drive. If you're running a fever, have severe allergies, or feel unwell, notify dispatch and wait for clearance or swap.
- Check your own physical baseline. Are you on a new medication that causes drowsiness? Notify your carrier and your medical examiner. Adjust your start time or seek a short, documented rest.
- Stay hydrated and eat properly. Dehydration and low blood sugar amplify fatigue perception and impair judgment.
During your shift:
- Take breaks before you feel yourself nodding off. Our data shows 393.9 (Inoperable Required Lamp) frequently appears in the same inspections as 392.2T, suggesting that fatigued drivers may miss vehicle maintenance checks. Stop every 2 hours to stretch and verify your lights and brakes are working.
- If you're on a long haul, build in a 10-minute nap or rest at a safe location rather than fighting drowsiness on the road. The objective is never to reach a checkpoint in a state where an officer feels you're unsafe.
- Don't rely on energy drinks or stimulants to push through fatigue. Officers are trained to recognize artificial wakefulness, and it doesn't change your actual impairment.
At the roadside:
- If you're stopped and an officer asks how you're feeling, be honest but brief. "I'm good" is better than "I've been driving for 18 hours straight." Volunteering that you're tired is an invitation for a 392.2T citation.
- If you do feel unwell, tell the officer directly and ask to rest in a safe location rather than drive away. This demonstrates good judgment and may prevent escalation.
The bottom line: 392.2T enforcement is rare (228 citations in 12 months) and rarely results in OOS status (0.6% rate), but the citation itself carries an 8-point CSA severity weight. A single citation impacts your safety profile. The best defense is honest self-assessment before you leave the yard.