What 392.22(a) means in plain language
When your commercial motor vehicle is stopped on or near a roadway — whether you've broken down, have a flat, or pulled over for any reason — federal regulations require you to set out specific warning devices to alert other traffic. Those devices are the red reflective triangles most drivers carry in a pouch behind the seat, or in some cases flares or fusees. The rule covers both the failure to carry the devices at all and the failure to actually deploy them when the situation demands it.
The placement requirements matter too. It's not enough to toss a triangle out the door. The devices need to be positioned at specified distances in front of and behind the vehicle, and the exact distances depend on whether you're on a divided highway, a two-lane road, or within a certain distance of a hill or curve that blocks visibility.
In short: if an officer walks up to your stopped CMV and the triangles aren't out, or you can't produce them at all, a 392.22(a) citation is what follows.
What our enforcement data actually shows
Across our database of 13 million-plus inspections, 392.22(a) has generated 5,302 all-time citations. That volume puts it at #328 out of 3,036 FMCSR codes by citation count — meaning it's cited more often than the large majority of codes on the books, but it's far from the most common violation officers write.
Here's the piece that should give you some relief: the out-of-service rate for 392.22(a) is 0.0%. Every single one of those 5,302 citations resulted in the driver continuing down the road, not being parked until the violation was corrected. That stands in sharp contrast to the all-FMCSR average OOS rate of 31.4% across all codes in our database. Getting cited here stings on paper, but it does not shut you down at the roadside.
Looking at recent activity, our inspection records show zero citations in the last 90 days and zero in the last 12 months. Enforcement of this specific sub-section appears to have gone quiet in recent data, though that doesn't mean officers have stopped writing it entirely — patterns can shift.
Who gets cited most
The statistics block for 392.22(a) does not include a state-level breakdown, so our data doesn't support naming specific states for this code. What the data does show is which large fleets appear most frequently in the citation records.
Among carriers, our data shows fleets such as NEW PRIME INC (USDOT 3706) with 53 citations and SWIFT TRANSPORTATION CO OF ARIZONA LLC (USDOT 54283) with 23 citations at the top of the list. The presence of high-volume truckload carriers here makes sense — fleets running millions of miles annually across all road types will accumulate citations on lower-frequency codes simply through exposure. A citation count in a large fleet's record does not indicate a systemic safety failure; it reflects scale.
The vehicle make data adds another layer. Freightliner-platform trucks (logged under both FRHT with 907 citations and FREIGHTLIN with 140 citations) account for the largest share of citations, followed by UTIL trailers at 521 and VOLV at 361. Those numbers track with overall fleet composition — Freightliner is among the most common heavy truck platforms on the road — so the citation distribution likely mirrors the broader population of CMVs rather than any platform-specific problem.
How severe is this compared to similar codes
392.22(a) sits in the Vehicle Maintenance category alongside some of the heaviest-hitting codes in roadside enforcement. Comparing it to a few peers puts it in perspective.
393.9(a) — Inoperable required lamps has been cited 660,737 times in our database — more than 124 times the volume of 392.22(a) — and carries a 15.4% OOS rate. Lamp violations are far more likely to stop your day cold.
396.3(a)(1) — Inspection, repair, and maintenance (general) shows 236,919 citations and a 45.3% OOS rate, making it one of the more consequential codes in the category. A citation there is nearly a coin flip for being placed out of service.
396.17C-PI — No proof of periodic inspection mirrors 392.22(a) in one important way: its OOS rate is also 0.0% across 212,081 citations. Some high-volume codes simply don't trigger OOS orders even though they appear on the inspection report and feed into CSA scoring.
The takeaway for your CSA score: 392.22(a) carries a severity weight of 4 under the BASIC 5 group. It's not the heaviest weight on the scale, but it does count, and it stays in your Unsafe Driving BASIC window for two years before it ages off with reduced impact.
How to avoid it
This violation is almost entirely preventable with habit. The pre-trip inspection is your main line of defense.
- Verify the triangle kit is on the truck before you move. Open the case, confirm all three triangles are present and not cracked or faded beyond recognition. A missing triangle you discover at a breakdown is too late.
- Know your deployment sequence cold. Practice the distances — 10 feet to the rear traffic side, 100 feet behind, 100 feet ahead — so that muscle memory takes over when you're on a shoulder with traffic moving at highway speed.
- Check the kit during every pre-trip, not just at the start of a new assignment. Triangles get borrowed, left at shop bays, or degraded by heat in summer. Build the check into your walk-around the same way you check tire condition.
- If you're in a Freightliner, Volvo, or Kenworth cab, confirm the storage location hasn't shifted. Our data shows FRHT, VOLV, and KW platforms are among the most frequently cited vehicle makes. On some configurations, the triangle kit is stored in a location that isn't immediately obvious to a driver new to that specific truck — confirm the location during orientation.
- When you do stop on the road, deploy immediately. The regulation requires devices to go out within 10 minutes of stopping. Don't wait to assess the situation first. Get the triangles out, then troubleshoot.
- During team driving handoffs or slip-seat operations, both drivers should verify the kit is present. Our data shows large truckload carriers accumulate citations on this code — the most likely scenario is a kit that went missing between drivers without anyone noticing.