What 392.22B-DFPWD means in plain language
When your commercial motor vehicle is stopped on a roadway or the shoulder — whether because of a breakdown, a flat tire, or any other emergency — federal regulations require you to get warning devices out of the truck and onto the road surface within a specific timeframe. The violation captured under 392.22B-DFPWD is straightforward: the driver failed to actually place those warning devices on the road.
This isn't about whether the triangles or flares were in the cab or whether they were the right type. The specific failure here is that they were never deployed to the road surface itself. If an officer arrives and finds your truck stopped without those devices positioned around the vehicle, that's the citation.
The requirement exists entirely around protecting you, other drivers, and anyone else on or near the road. A large commercial vehicle stopped without visible warning devices — especially in low-light conditions or on a curve — is a serious hazard. The regulation forces the deployment step, not just the possession step.
What our enforcement data actually shows
Across our database of 13 million+ inspections, 392.22B-DFPWD has accumulated 7,867 all-time citations. In the last 12 months alone, our inspection records show 6,298 citations — meaning the overwhelming majority of all-time citations are very recent, signaling this code is being enforced more aggressively now than at any prior point in the data.
The 90-day total stands at 1,031 citations, confirming this remains an active enforcement priority right now.
Here's the critical number for your situation: the out-of-service rate for 392.22B-DFPWD is 0.0%. Across all 7,867 recorded citations, not a single driver was placed out of service. That's a sharp contrast to the all-FMCSR average OOS rate of 31.4%. This code is ranked #261 out of 3,036 FMCSR codes by citation volume — it's cited frequently, but it carries zero OOS risk based on everything in our database.
That doesn't mean you should ignore it. Citations accumulate in your inspection history, affect your carrier's SMS scores, and can influence future scrutiny at the roadside.
Looking at the monthly trend data, citations jumped from 103 in April 2025 to a sustained range of 568–670 per month from October 2025 through January 2026, before softening somewhat in early 2026. That spike and plateau pattern suggests a coordinated enforcement push that has not fully unwound.
Who gets cited most
The geographic concentration of this violation is striking. Our inspection records show that in the last 180 days, Louisiana accounted for 2,671 citations — by far the dominant state in this dataset. Pennsylvania came in second at 49 citations, and Nebraska third at 33 citations. The gap between Louisiana and every other state is not a rounding error; Louisiana is driving the enforcement story on this code right now. OOS rates across Louisiana, Pennsylvania, and Nebraska are all 0.0%, so there is no meaningful variation in enforcement severity by state — just a dramatic difference in citation volume.
If you operate lanes that run through Louisiana, this should be on your radar as a high-scrutiny state for warning device deployment compliance.
On the carrier side, our data shows fleets such as NEW PRIME INC (USDOT 3706) with 51 citations and J B HUNT TRANSPORT INC (USDOT 80806) with 32 citations leading the all-time totals. These are large-volume carriers, so their citation counts reflect scale as much as anything else.
The top cited vehicle makes in our database include Freightliner at 3,314 citations, Volvo at 1,088, and Kenworth at 883. These reflects fleet composition across the industry rather than any vehicle-specific defect — warning device deployment is a driver behavior, not a mechanical failure.
How severe is this compared to similar codes
Looking at peer codes in the Unsafe Driving category, 392.22B-DFPWD's enforcement profile is notable for its low OOS rate relative to volume.
Consider 392.2 (Operating a CMV while ill or fatigued), which carries 1,208,164 citations and a 0.8% OOS rate. That code dwarfs 392.22B-DFPWD in volume and carries genuine OOS risk. Similarly, 392.2-SLLEQP (Operating a CMV while ill or fatigued) shows a 2.4% OOS rate across 72,352 citations — meaning drivers cited under that code face real odds of being parked. By contrast, our database shows zero OOS placements for 392.22B-DFPWD across its entire citation history.
392.2-SLLSR (Operating a CMV while ill or fatigued) has 191,232 citations and a 0.1% OOS rate — still higher than this code's 0.0%. The pattern is clear: 392.22B-DFPWD is enforced frequently but treated as a documentation and behavior violation rather than an immediate safety threat serious enough to pull a driver.
How to avoid it
The co-occurrence data tells an important story. In the last 90 days, 392.22A-D (Emergency warning devices not displayed) appeared alongside 392.22B-DFPWD in 927 shared inspections. These two codes almost always travel together — one covers the display requirement, the other the deployment on the road surface. If you're getting one, you're likely getting both.
Also notable: 392.2-SLLUP (Operating a CMV while ill or fatigued) appeared in 154 shared inspections alongside this code. That co-occurrence suggests inspectors are finding stopped vehicles and then examining the driver's condition. A breakdown situation draws scrutiny across multiple violation categories.
Here's what to do before and during any roadside stop:
- Pre-trip, every day: Physically confirm your warning device kit — triangles or fusees — is in the truck and accessible. Don't assume it's there because it was last week. Freightliner, Volvo, and Kenworth cabs are the most cited, so know exactly where the kit is stored in your specific vehicle.
- The moment you stop on a roadway or shoulder: Start your mental clock. Get the devices out and onto the road surface before you do anything else — before you call dispatch, before you look at the tire, before you text. Placement comes first.
- Position devices correctly: Behind the vehicle in the direction of approaching traffic, not just propped against the truck. If you're not placing them on the road surface at the right distances, you're still at risk for the companion code 392.22A-D.
- If you're fatigued or ill: Stopping the truck doesn't end your inspection exposure. Our data shows fatigued-driving codes co-occurring frequently with this violation. When you stop, deploy devices immediately — that's the one action you can take that directly removes this specific citation risk.
- Know your Louisiana exposure: If you run lanes through Louisiana, treat warning device deployment as a zero-exception habit. With 2,671 citations in 180 days, enforcement there is not theoretical.